The solution of the given system of equations is (-1, -2).
Explain the method of substitution?Three steps make up the substitution technique: For each of the variables, solve one equation. Put this expression (or plug it in) into the other equation, then solve it. To identify the corresponding variable, rewrite the value's original equation.We are aware that a linear system of equations can be solved using a substitution method.
The intersection of the two lines represents the system's solution.
The given equations are-
y = 3x+1 ...eq 1
y = -2x-4 ...eq 2
Put the value of eq 1 in eq2 .
3x+1 = -2x-4
3x + 2x = -4 - 1
5x = -5
x = -5/5
x = -1
Put the x in eq 1.
y = 3(-1)+1
y = -2
Thus, the solution of the given system of equations is (-1, -2).
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The complete question is-
What is the solution to the system of equations-
y=3x+1 ;
y=-2x-4
Round your answer to the nearest whole number. Do not include any decimals of % signs in your answer.
In a video game, to cause damage to the final boss, you must attack him with back to back critical hits. Based on your current gear in the game, you only have a 33% chance of attacking with a critical hit.
What is the probability that your first strike will be a critical hit?
What is the probability that your first strike was not a critical hit?
What is the probability that your first strike was a critical hit but not your second strike?
What is the probability that you are able to cause damage?
What is the probability that your strike was not critical but your next 2 attacks were?
The probabilities in this problem are given as follows:
First strike is a critical hit: 33%.First strike is not a critical hit: 67%.First strike is critical and the second is not: 22%.Cause damage: 11%Not critical followed by two criticals: 7%.What are the probabilities?The probabilities for each strike are given as follows:
Critical hit: 33%.Not a critical hit: 67%, as 100 - 33 = 67.The probabilities are independent, meaning that for each trial they are the same.
Thus the probability that your first strike was a critical hit but not your second strike is obtained as follows:
P = 0.33 x 0.67 = 0.2211 = 22%. (rounded).
Damage is caused with two consecutive critical hits, hence:
p = 0.33 x 0.33 = 0.11 = 11%.
The final probability, that your strike was not critical but your next 2 attacks were, is obtained as follows:
p = 0.67 x 0.33 x 0.33 = 0.07 = 7%.
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A bag contains 8 red marbles, 9 yellow marbles, and 7 green marbles. How many additional red marbles must be added to the 24 marbles already in the bag so that
the probability of randomly drawing a red marble is
3/5?
A. 11
B. 16
C. 20
D. 24
E 32
The number of additional red marbles to be added to the total 24 marbles present in the bag is 16 marbles.
What is Probability?
Probability is the ability to happen. The subject of this area of mathematics is the occurrence of random events. From 0 to 1 is used to express the value. To forecast how probable occurrences are to occur, probability has been introduced in mathematics. The degree to which something is likely to happen is essentially the definition of probability. This is the fundamental theory of probability, which is also applied to the probability distribution, and from which you will discover the likelihood of results for a random experiment. We must first determine the total number of outcomes in order to calculate the probability that a single event will occur.So, Probability of Event, P(E) = Number of Favourable Outcomes/ Total Number of OutcomesFrom the question, it is given that the,
Number of Red marbles = 8
Number of Yellow marbles = 9
Number of Green marbles = 7
So, the total number of marbles = 8 + 9 + 7 = 24
Let [tex]x[/tex] be the additional number of red marbles added to the bag.
The total number of red marbles after the addition of [tex]x[/tex] red marbles into the bag = [tex]8+x[/tex]
The total number of all marbles after the addition of [tex]x[/tex] red marbles into the bag = [tex]24+x[/tex]
The probability of randomly drawing a red marble is given as equal to [tex]\frac{3}{5}[/tex]
We know that, the probability of randomly drawing a red marble is equal to the ratio of the total number of red marbles to the total number of all marbles.
---> P(R) = n(R)/n(T)
Substituting the given values, we get
3/5 = 8+x / 24+x
---> 5(8+x) = 3(24+x)
---> 40 + 5x = 72+3x
Solving, we get
5x - 3x = 72 - 40
---> 2x = 32
---> x = 16
Therefore, the additional number of red marbles to be added to obtain the required probability is equal to 16.
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A spinner contains the numbers 1 through 75. What is the probability that the spinner will land on a number that is not between 16 and 25, inclusive?
The probability that the spinner would land on a number that is not between 16 and 25 as required in the task content is; 13 / 15.
What is the probability that the spinner would land on a number that is not between 16 and 25?It follows from the task content that the probability that the spinner would land on a number that is not between 16 and 25, inclusive be determined.
Since the spinner contains 1 through 75, the number of event in the sample space is; 75 events.
Also, the number of events between 16 and 25, inclusive is; 10.
Therefore, the number of events outside 16 through 25 is; 75 - 10 = 65.
Therefore, the required probability that the spinner would land on a number that is not between 16 and 25 is;
= 65 / 75
= 13 / 15.
Therefore, the required probability is; 13 / 15.
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Answer:
Step-by-step explanation:
Calculate the area of this triangle.
5 cml
13 cm
12 cm•
Answer: Area of triangle=30 cm²
Step-by-step explanation:
Let's name the triangle ABC.
Assuming these are the 3 sides of the triangle, and naming them a,b,c.
a=5 cm
b=13 cm
c=12 cm
Semi perimeter of the triangle ABC= s = (a+b+c)/2
s=(5+13+12)/2 =30/2=15.
Area of triangle ABC= √(s * (s-a)*(s-b)*(s-c)
= √(15*(15-5)*(15-13)*(15-12)
= √15*10*2*3
= √150*6
=√900
=30 cm²
Area of triangle ABC = 30 cm².
A line with a slope of -7/16 passes through the point (-16, 7). What is its equation in
slope-intercept form?
A equation of line with a slope of -7/16 passes through the point (-16, 7) is y = (-7/16)x
We know that the formula for the slope-point form of equation of line:
(y - y1) = m(x - x1)
Let (x1, y1) = (-16, 7)
and slope m = -7/16
Using above formula,
(y - 7) = (-7/16)(x - (-16))
y - 7 = (-7/16)(x + 16)
y = -7/16x - 7 + 7
y = (-7/16)x
This equation is slope-intercept form (y = mx + c) with slope -7/16 and y-intercept 0.
Therefore, a equation of line with a slope of -7/16 passes through the point (-16, 7) is y = (-7/16)x
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Hi everybody, I'm having trouble with this problem. What is 2,456.75 plus 4.75 x 32
(Please show work) Thank you!
Answer:
Step-by-step explanation:
4.75 x 32=152
2,456.75+152=2608.75
Answer:
2608.75
Step-by-step explanation:
4.75 x 32 = 152
2456.75 + 152 = 2608.75
Evaluate this expression: (7 ⋅ 2) + 4^2 - 12 ÷ 4
I don't know how to figure this out
Is it possible for a number to be a product of 2, a product of 5,
and a product of 10? Explain.
The possible number is 10 which is a product of 2, 5, 10
LCM stands for "Least Common Multiple." The smallest multiple that two or more numbers share is defined as the least common multiple. It is also known as the Least Common Divisor (LCD). For example, LCM (4, 5) = 20. In this case, the LCM 20 is divisible by both 4 and 5, so 4 and 5 are referred to as the divisors of 20.
Given numbers 2, 5, 10
We have to find the number which is produced by the given numbers
Now we have to find the LCM of these numbers
LCM of 2, 5, 10
2 = 2 x 1
5= 5 x 1
10 = 2 x 5
= 1x 2 x 5
= 10
The LCM of 2,5,10 is 10
Therefore 10 is the required number which is a product of 2, 5, 10
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Phil shot a 73 on the golf course on Wednesday. He shot a 62 on Thursday. What is the percent of change for his scores?
Answer: 13500%
Step-by-step explanation:
73+62=135
135 to make a percentage you would multiply 135 times 100=13500%
I think thats right
calculate the area (ignore the scribble)
Jenni wrote a conditional statement an it’s converse conditional if the angles are right angles then the angles have the same measure
Jenni wrote the converse statement properly, however the statement is false, hence the correct option with a counter example is:
Yes; two angles that each measure 41°.
What are conditional and converse statements?A conditional statement is written as follows:
p -> q.
In which the terms of the conditional statement are listed as follows:
p is the hypothesis.q is the conclusion.In this problem, the statement is:
If angles are right angles, then the angles have the same measure.
Hence the terms is:
p: right angles.q: same measure.For the converse statement, the hypothesis and the conclusion are exchanged, hence:
q -> p.
Thus the converse of Jenni's statement is:
If two angles have the same measure, then they are right angles.
Which means that she wrote the converse statement properly.
However, the angles do not necessarily need to measure 90º, they only need to have the same measure, hence the correct option is:
Yes; two angles that each measure 41°.
Missing InformationThe complete problem is:
Jenni wrote a conditional statement and its converse.Conditional: If angles are right angles, then the angles have the same measure.Converse: If angles have the same measurement, then they are right angles.Did Jenni write the converse statement properly? Give a counterexample to dispute the validity of the converse statement.No; two angles that each measure 45°Yes; two angles that each measure 90°Yes; two angles that each measure 41°No; two angles that each measure 82°.
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Find the quotient. 5 divided by 1/4
Answer:
5 : (1/4) = 201 = 20
Step-by-step explanation:
y is directly proportional to x3 When x = 10, y = 250
(a) Find a formula for y in terms of x.
Answer:
y = 0.25x³
Step-by-step explanation:
Since y is directly proportional to x³, then y = kx³, where k is a constant.
When x = 10, y = 250,
250 = k(10)³
1000k = 250
∴ k = 0.25
∴ y = 0.25x³
Rearrange g
=
fr to make f the subject.
Answer:
f=g/rStep-by-step explanation:
divide by R
Which ordered pair in the form (a, b) is a solution of this equation?
4a - 5b = 24
L
Answer: (6, 0)
Step-by-step explanation:
Plug each coordinate in and see if the equation holds true.
At (6,0), [tex]4(6)-5(0)=24[/tex].
So (6, 0) is a solution of the equation.
Earn 100 points if you give right answer.
Answer:
Conveyor belt 1 is fasterStep-by-step explanation:
GivenConveyor belt1: m(x) = 157.1xFind the equation of p(x) using table.
We see it is a proportional relationship, therefore:
p(x) = kx125.6 = 2kk = 125.6/2k = 62.8Conveyor belt2: p(x) = 62.8x
As we see 157.1 > 62.8 which means conveyor 1 belt is faster.
Answer:
The conveyor belt 1 is faster.
Step-by-step explanation:
Speed of conveyor belt 1,
→ m(x) = 157.1x
Now the speed of conveyor belt 2,
→ p(x) = x
→ p(125.6) = 2x || p(188.4) = 3x
→ x = 125.6/2 || x = 188.4/3
→ [ p(x) = 62.8 ] || [ p(x) = 62.8 ]
Then the fastest conveyor is,
→ m(x) = 157.1x > p(x) = 62.8
→ 157.1x > 62.8
→ Conveyor 1 > Conveyor 2
Hence, the conveyor belt 1 is faster.
What is the answer to: 5/23 ÷ 23/24:
Willl mark brainliest
Answer:
It is 120/529
Step-by-step explanation:
The steps are:
Step 1: When we divided, we change the dividing fraction into mutiplying fraction at the last fraction: 5/23 x 24/23
Step 2: We mutiply it on each row like 5 x 24 & 23 x 23
Step 3: When we finished with the answer, we put it like the order of the fraction: 120 & 529 so we get 120/529
Thats all the step by step explaination!
Please mark me brainliestttttttttttttttttttttttttttttttttttttttttttttttt !!!!!!!!!!!!!!!!!!!!!!!!11
ILL GIVE BRAINLIEST IF CORRECT
Answer:
(-6,4)
Step-by-step explanation:
add the equations together to equal
2y=8
y=4
now solve for x
3x+10(4)=22
3x+40=22
3x=-18
x=-6
Answer:
(-6,4)
Step-by-step explanation:
add the equations together to equal
2y=8
y=4
now solve for x
3x+10(4)=22
3x+40=22
3x=-18
x=-6
someone help pls tysm
The mean of the number of plants (d) increases by 5.5
How to compare the mean of the number of plants?From the question, we have the table of values that can be used in our computation:
In the table, we have the following rows
Plants and Number of tomatoes
The mean of the number of plants is calculated as
Mean plant = Total number of tomatoes/Total number of plants
For the four plants, we have
Total number of tomatoes = 31 + 25 + 6 + 28 = 90
Total number of plants = 4
Substitute the known values in the above equation So, we have the following equation
Mean plant = 90/4
Mean plant = 22.5
For the three plants, we have
Total number of tomatoes = 31 + 25 + 28 = 84
Total number of plants = 3
Substitute the known values in the above equation So, we have the following equation
Mean plant = 84/3
Mean plant = 28
See that the difference is an increment of
Increment = 28 - 22.5
Evaluate
Increment = 5.5
Hence, the mean increases by 5.5
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A researcher is interested in determining the average number of years employees of a company stay with the company.
If past information shows a standard deviation of 7 months, what size sample should be taken so that at 95% confidence the margin of error will be 2 months or less?
The size sample that should be taken so that at 95% confidence the margin of error will be 2 months or less is:47.0596.
How to find the sample size?Using this formula to find the sample size
n = z² × σ² / e²
Where,
n = sample size =?
z = z-score = 1.96
σ = Standard deviation = 7 months
e = Margin of error = 2 months or less
Let plug in the formula
n = (1.96²× 7²) /2²
n = 3.8416 × 49 / 4
n =47.0596
Therefore the sample size is 47.0596.
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Need help again filling in the table?
Answer:
1.y=-16
2.y=-10
3.y=-4
4.y=2
hope ut helps!
have a nice night
18. Vocabulary Use Distributive or Commutative to complete the definition.
According to the __________ Property of Multiplication, factors can be multiplied in any order and the product remains the same.
The correct vocabulary for the definition is Commutative.
Commutative property states that the result remains the same even if the order of the numbers are changed during operation.
For multiplication,
[tex]a*b=b*a[/tex]
Thus, the correct vocabulary for the definition is Commutative.
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increase 24in the ratio 2:3
Answer: 16
Step-by-step explanation:
To *increase* 24 in the ratio 2:3
To *increase* a quantity in given ratio consider new quantity and old quantity.
Formula: New quantity:old quantity=given ratio solution: let us take the new quantity as x, old quantity as 24(given) and given ratio=2:3(given)
-> x:24=2:3
-> x/24=2/3
-> Multiply with 24 on both sides to get x
-> 24*x/24=2/3*24
-> x=16
So, the *increase* of 24 in the ratio 2:3 is 16
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markus makes $65,500 annually. assuming markus is paid on the 1st and the 15th of every month, calculate his earnings
Markus' biweekly earnings (gross pay every two weeks) are $2,727.16.
How is the biweekly earnings determined?The annual gross pay can be divided by 26 to get the biweekly earnings.
Another way to compute the biweekly earnings is by adding up the withholding taxes, deductions, and net earnings.
In practice, the net earnings are equal to the gross pay less withholding taxes and deductions.
Annual gross pay = $65,500
Payment period = biweekly (1st and 15th every month)
Withholding taxes:Social Security = $156.19
Medicare = 36.53
Federal tax = 445.96
Total withholding = $636.68
Deductions:Retirement = $45
Health Insurance = $200
Total deductions = $245
Net Earnings = $1,845.48
Biweekly ross pay (earnings) = $2,727.16 ($636.68 + $245 + $1,845.48)
Thus, Markus earns $2,727.16 every two weeks.
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8. ALGEBRA Diego's Subs is offering $0.75 off its foot-long meatball sub. If this represents a 20% markdown, what is the sub's regular selling price?
A $3.25
в $4.25
C $2.75
D $3.75
The sub's regular selling price, if it represents a 20% markdown is $3.75
option D.
What is meant by cost price and selling price?The precise value that corresponds to the unit price paid is represented by the cost price. In some stock market theories, this value is utilized to establish the value of stock holdings and is used as a key determinant of profitability. The precise value that corresponds to the unit price paid is represented by the cost price.
The amount a buyer pays for a good or service is known as the selling price. Depending on the price that consumers are prepared to pay, the seller is willing to take, and how competitive the price is in relation to other companies in the market, it may change.
Given,
ALGEBRA Diego's Subs is offering $0.75 off its foot-long meatball sub.
Then, C.P-S.P= 0.75
S.P-C.P= 0.75
And also given that it represents 20% mark down.
Then,
((C.P-S.P)/C.P)×100=% mark down
((C.P-S.P)/C.P)×100=20%
(0.75×100)/C.P=20
C.P=75/20
C.P=$3.75
Therefore, the sub's regular selling price is $3.75
So, the answer is option D
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PLEASE HELP
The access code for a car's security system consists of four digits. The first digit cannot be zero and the last digit must be odd. How many different codes are available? (Note that 0 is considered an even number.)
The number of different codes available is ___
(Type a whole number.)
The number of different codes available is 4500 unique codes
What is digit?
A positional numeral system uses a single symbol, such as "2," or a combination of symbols, such as "25," to represent numbers. This single symbol is known as a numerical digit. The word "digit" derives from the fact that ten fingers (Latin: digiti) on each hand correspond to the ten numeral symbols used in the base-10 system, or decimal digits (Old Latin: decem, meaning "ten"). The absolute value of the base determines how many different digits are necessary for a given numeral system with just an integer base. For instance, the binary system (base 2) only needs two digits, whereas the decimal system (base 10) necessitates ten digits (0 through 9). (0 and 1).
The digits are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
There are nine options because the first digit cannot be 0. (assuming 1 can be the first digit as well as all others)
There are 10 options for the second digit, third digit, fourth digit, and fifth digit.
4 digits must be odd, giving you 5 options (1,3,5,7,9)
9*10*10*5=4500 unique codes
Hence, there are 4500 unique codes available
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I need assistance with this math assignment
Answer:
t=1.33333 seconds
Step-by-step explanation:
1. We are give the the position function, s(t). We must differentiate s(t) twice in order to find the acceleration function, a(t).
s(t) = t⁶-2t⁵
Taking the power rule to differentiate s(t), we find the velocity function, v(t).
v(t) = d/dt (t⁶-2t⁵)
v(t) = 6t⁵-10t⁴
Differentiate v(t) using the power rule again to find the acceleration function, a(t).
a(t) = d/dt (6t⁵-10t⁴)
a(t) = 30t⁴-40t³
2. To find the other t value where acceleration is equal to zero, we must set a(t) to zero.
a(t) = 30t⁴-40t³ = 0
3. Algebraically solve for t. Factoring out 10t³ from a(t), we have:
10t³(3t-4)=0
Our solutions are t=0 and t=4/3.
The other value of t when acceleration is equal to zero is 4/3, or 1.33333 seconds.
Triangle ABC is similar to Triangle MPN. Find x and y. AB=15. BC=18. AC=9. I need this answer ASAP
The value of x and y in the similar triangles are 10 and 12 respectively.
What are similar triangles?Two triangles are similar if they have the same ratio of corresponding sides and equal pair of corresponding angles.
In other words, similar triangles are the triangles that have corresponding sides in proportion to each other and corresponding angles equal to each other
The triangles ABC and MPN are similar triangles.
Therefore,
∠A = ∠M
∠B = ∠P
∠C = ∠N
Hence, let's find x and y using the proportion as follows:
[tex]\frac{AB}{MP}=\frac{BC}{PN}=\frac{AC}{MN}[/tex]
Hence,
PN = y
MP = x
Therefore, let's find x
[tex]\frac{9}{6}=\frac{15}{x}[/tex]
cross multiply
9x = 90
x = 90 / 9
x = 10
Let's find y
[tex]\frac{9}{6}=\frac{18}{y}[/tex]
cross multiply
9y = 108
y = 108 / 9
y = 12
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The graph of a quadratic function with vertex (2, 0) is shown in the figure below.
Find the range and the domain.
Write the range and domain using Interval notation.
Answer:
Domain: (-∞, +∞)
Range: [2, +∞)
Step-by-step explanation:
Domain is the "allowable x-values/inputs"
Range is the "possible y-values/outputs when the x-values in the domain are inputted".
From the graph, notice how each end of it extends infinitely to the left and to the right. This means that the domain is infinite and there are no restrictions. Writing it in interval location would look like this:
(-∞, +∞)
Also, notice how the y-values increase from the vertex but do not go below it. That suggests that the range is "lower-bounded" to the vertex, and increases infinitely. Writing it in interval location would look like this:
[2, +∞)
(Multiplying and Dividing with Scientific Notation MC)
3.185x10¹7
9.1x108
Divide
Write the final answer in scientific notation.
The correct answer or scientific notation when 3.185× 10¹⁷ is divided by 9.1×10⁸ is 3.46×10⁸ and multiplying 3.185× 10¹⁷ with 9.1×10⁸ is 2.9×10²⁶.
It is given in the question that 3.185× 10¹⁷ is divided by 9.1×10⁸
we can write 3.185×10×10¹⁶ which equals 31.5×10¹⁶.
Now dividing 31.5×10¹⁶ by 9.1×10⁸ we get 3.46×10⁸.
Now multiplying 3.185× 10¹⁷ with 9.1×10⁸ we get 28.98×10²⁵
Converting 28.98×10²⁵ in scientific notation we get 2.9×10²⁶.
Numbers that are either too large or too little to be conveniently stated in decimal form can be expressed using scientific notation and known as standard form in the UK .
In scientific notation, a representation of a number that is a power of ten can also be written with equal ease. Additionally, you'll see that the amount of zeros in a regular decimal expression is exactly equal to the power to which 10 is raised.
Any time a number is expressed in words, it must first be written down as a regular decimal number before being converted. "Ten million" becomes "10,000,000" and vice versa.Ten million is written in powers of ten notation because there are seven zeros in all.
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