Answer:2x^2+3x-2
Step-by-step explanation:
2x-1*x+2=2x^2+3x-2
Answer:
2x+3
Step-by-step explanation:
so first you plug in g(x) in for x in f(x). this is how it will look like
2(x+2)-1
then you distribute the 2 in both terms in the parenthesis.
2(x)+2(2)-1
after that, you multiply them and you will get this
2x+4-1
subtract 4 and 1 and this is your answer
2x+3
Mang Efren is now 5 times as old as his son. Four years ago, the product of their ages was 52. Find Mang Efren's present age in years. (Just type in the numerical value of your answer)
Mang Efren's present age is 30 years.
Let's assume the present age of Mang Efren's son is x years.
Mang Efren is presently 5 times as old as his son.
So, Mang Efren's present age = 5x years
Four years ago,
Mang Efren's son's age = x - 4 years.
Mang Efren's age = 5x - 4 years
According to the question, four years ago, the product of their ages was 52.
From this information, we will create an equation.
(x - 4)(5x - 4) = 52
5x² - 4x - 20x + 16 = 52
5x² - 24x + 16 - 52 = 0
5x² - 24x - 36 = 0
Solving the quadratic equation to obtain the value of x,
5x² - 30x + 6x - 36 = 0
5x(x -6) + 6(x - 6) = 0
(5x - 6)(x - 6) = 0
x = 6
So, Mang Efren's present age is 5 × 6 = 30 years.
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The price of a math textbook can be modeled by the equation:
y = 2x + 76, where x is time in years and y is the price of
the textbook. This equation tells us that the textbook originally
cost $76 and each year the cost went up $2. How many years
will it take for the textbook to cost $100?
what two numbers multiply to 2400 and add up to -16?
Based on the fact that the two numbers multiply to 2,400 and add up to -16, the numbers are undefined.
How to find the numbers?Assume that one of the numbers is x and the other number is y, the system of equations to represent this is given that the two numbers add up to -16 and multiplying to 2,400:
x + y = -16
xy = 2,400
Expressing y in terms of x :
xy = 2,400
y = 2,400 / x
Solving for x gives:
x + y = -16
x + (2,400 / x) = -16
x = 0
y = 0
The problem given in the question is wrong because the results of x and y are undefined.
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Solve 7x − 2(x + 1) = 6x + 14
A. x = −12
B. x = 12
C. x = −16
D. x = 16
I don't know what to do here.
Answer: C, x = -16
Step-by-step explanation:
1. Distribute
7x-2(x+1)=6x+14
7x-2x-2=6x+14
2. Combine like terms
7x-2x-2=6x+14
5x-2=6x+14
3. Add 2 to both sides
5x-2+2=6x+14+2
4. Simplify
Add the numbers
5x=6x+16
5. Subtract 6x from both sides
5x-6x=6x+16-6x
6. Simplify
Combine like terms
-x=16
7. Divide both sides by the same factor
-x/-1=16/-1
8. Simplify
Cancel terms that are in both the numerator and denominator
Divide the numbers
Evaluate the expression for x=-1,0, 1, 2
-3x + 4
X=0
X=-1
x = 1
X=2
Answer:
-3(-1) + 4 = 3 + 4 = 7
-3(0) + 4 = 0 + 4 = 4
-3(1) + 4 = -3 + 4 = 1
-3(2) + 4 = -6 + 4 = -2
find the value of x when y=10 and 2y+y=x
x = 30
Step-by-step explanation:
Given,
y = 10, x = ?
2y+y = x → Equation no. (1)
Substitute the value of y in Equation no. (1) then,
2(10)+10 = x
20+10 = x
30 = x (OR) x = 30.
12. Adam didn't sleep well the night before a big trip. He only slept 4 ½ hours. This is 3/5
of what he usually sleeps. How many hours does he usually sleep?
Answer:
seven and a half hours
Step-by-step explanation:
aa
Which of the following is equivalent to 2.76?
2.76%
27.6%
two and nineteen twenty fifths
twenty five over nineteen
The equivalent number to 2.76 is the mixed number 2 + 19/25.
Which of the following is equivalent to 2.76?
Here we need to see which option is equivalent to the given number, which is 2.76.
We can rewrite this as a mixed number.
2 + a/b
Such that:
a/b = 0.76
By looking at the options, we can see:
19/25 = 0.76
Then the correct option is:
2 + 19/25
So the third option is the correct one.
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Hi, I am taking PSAT and I am working on the math section. I need help with answering this math type of question. Please give the best explanation.
By using the concept of uniform rectilinear motion, the distance surplus of the average race car is equal to 3 / 4 miles. (Right choice: A)
How many more distance does the average race car travels than the average consumer car?
In accordance with the statement, both the average consumer car and the average race car travel at constant speed (v), in miles per hour. The distance traveled by the vehicle (s), in miles, is equal to the product of the speed and time (t), in hours. The distance surplus (s'), in miles, done by the average race car is determined by the following expression:
s' = (v' - v) · t
Where:
v' - Speed of the average race car, in miles per hour.v - Speed of the average consumer car, in miles per hour.t - Time, in hours.Please notice that a hour equal 3600 seconds. If we know that v' = 210 mi / h, v = 120 mi / h and t = 30 / 3600 h, then the distance surplus of the average race car is:
s' = (210 - 120) · (30 / 3600)
s' = 3 / 4 mi
The distance surplus of the average race car is equal to 3 / 4 miles.
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the associative property holds true for multiplication because -3 x4 x-2 = -3 x 4 x-2 does the associative property hold true for divison of integers
Answer:
Step-by-step explanation:
No it does not hold for division nor subtraction. An example would be 8÷(4÷2)≠(8÷4)÷2. You would get two complete different answers. For the first equation you would get 4 where as for the second equation you would get 1.
Please help. I would appreciate it! Will mark brainlyest if you remind me and if someone replies just remind me!
In the picture there is a prism with measures. The surface area of prism is 156.
Given that,
In the picture there is a prism with measures.
We have to find the surface area of prism.
The surface area of prism=(2×base area)+(Base perimeter×height)
The base is trapezoid
So, the area of trapezoid is (a+b)/2×h
=(6+12)/2×4
=18/2×4
=9×4
=36
Here base area we got is 36.
Now, we find the perimeter of trapezoid is a+b+c+d
=6+12+5+5
=18+10
=28
Here, base perimeter we got is 28.
Now surface area of prism is
=(2×36)+(28×3)
=72+84
=156
Therefore, the surface area of prism is 156.
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Melissa rented a Segway, a stand up scooter, in downtown Austin, Tx. The store charges a $3.25 initial charge plus $2.50 per mile. Which equation can be used to find y, the total cost of the rental, if x represents the number of miles Melissa rode on the Segway?
pls it has to be like "y=mx+b"
Answer:
y = x(2.50)+3.25
Step-by-step explanation:
y (total cost )= x (miles rode) * 2.50 (cost per mile) + 3.25 (initial cost)
URGENT!! ILL GIVE
BRAINLIEST! AND 100 POINTS
The answer is not D
Answer:
b
Step-by-step explanation:
I need help with this assignment
Answer:
8800000 or 88x 10^5
Step-by-step explanation:
4x2200000=8800000
Clay is flying a helicopter at an altitude of 400 feet in the air. Jason is diving 200 feet below the surface.
How far apart are Clay and Jason?
Explain how to show the distance between Clay and Jason using absolute value.
Clay and Jason are 600 feet far apart.
When an object goes above the surface, the altitude is measured as +ve and when an object goes below the surface, the altitude is measured as -ve.
Since Clay is flying a helicopter at an altitude of 400 feet in the air,
The Value of altitude of Clay = +400
Since, Jason is diving 200 feet below the surface,
The Value of altitude of Jason = -200
The the distance between Clay and Jason = (The Value of altitude of Clay) - (The Value of altitude of Jason)
= +400 - (-200)
= 400 + 200
= 600 feet
Therefore, the distance between Clay and Jason is 600 feet.
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Find all values for x that will make this expression equal to 0.
3x(x+6)
Answer:
3x(x+6)
=(3x)(x+6)
=(3x)(x)+(3x)(6)
=3x2+18x
Step-by-step explanation:
Graph this.
y=2/3x-4
Answer:
Step-by-step explanation:
Put the left dot on negative 4, and then put the right dot on positive 6.
what is the value of n?
Answer: Sorry for the late answer, I was already answering it by the time someone else answered
Step-by-step explanation:
Since two angles on a straight line add up to 180, I used the angles given to find the adjacent angles to it by subtracting those angles from 180. Then, since the angles of a triangle add up to 180, I used the angles I just solved for to find the angle that is adjacent to n. I did the same thing I did to the first two angles by subtracting it from 180 to find n, which was 69 degrees
Help! I don’t know if this is correct
Answer:
can you turn it to the carma I can see it that good
How do you write 6% as a fraction or mixed number?
Answer:
As a fraction: 3/50
It cannot be turned into a mixed number
your pulse reflects the rate at which your heart beats. a healthy resting pulse rate in adults is between 60 and 100 beats per minute. in which of these two settings is a binomial distribution more likely to be at least approximately correct? explain your answer. (a) you select at random 10 times in the next 24-hour period to take your pulse. you then go about your usual activities, including exercising and sleep. the random variable ???? is the number of measurements that are less than 100 beats per minute. (b) a nurse instructs an adult patient to take his resting pulse 10 times over the next few days. a resting pulse requires resting for at least 10 minutes before taking the pulse. the random variable ???? is the number of measurements that are less than 100 beats per minute.
The situation in which the binomial distribution can be approximated to the normal distribution is given by:
(b) a nurse instructs an adult patient to take his resting pulse 10 times over the next few days. a resting pulse requires resting for at least 10 minutes before taking the pulse. the random variable ???? is the number of measurements that are less than 100 beats per minute.
What is the binomial distribution formula?The formula for the probability of x successes is:
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
The parameters are given by:
n is the number of trials of the experiment.p is the probability of a success on a single trial of the experiment.The binomial distribution can be approximated to the normal distribution if there are at least 10 failures and 10 successes on the experiment, that is:
np ≥ 10, n(1 - p) ≥ 10.
Meaning that a large number of trials is usually required for the approximation.
In the context of this problem, to achieve the large number of trials needed for the approximation, multiple days are needed to take the observations, hence option b is correct.
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HELP I’LL MARK BRAINLIEST AND ITS 100 POINTS
p: a month begins with the letter M; q: it has 31 days
match the statements
1) conditional
2) converse
3) inverse
4) contrapositive
if a month does not begin with the letter M then it does not have 31 days
if a month does not have 31 days then it does not begin with the letter
if a month begins with the letter M then it has 31 days if a month has 31 days then it begins with the letter M
Answer:
1) Conditional
If a month begins with letter M, then it has 31 days.
2) Converse
If a month has 31 days, then it begins with letter M.
3) Inverse
If a month does not begin with the letter M, then it does not have 31 days.
4) Contrapositive
If a month does not have 31 days, then it does not begin with the letter M.
Step-by-step explanation:
1) Conditional
If a month begins with letter M, then it has 31 days.
2) Converse
If a month has 31 days, then it begins with letter M.
3) Inverse
If a month does not begin with the letter M, then it does not have 31 days.
4) Contrapositive
If a month does not have 31 days, then it does not begin with the letter M.
Conditional statement states the original statement. If 'p' , then 'q'
Converse statement switch positions in the original if --then statement. If 'q', then 'p'
Inverse statement states the opposite of the original statement. If not 'p', then not 'q'.
Contrapositive if not 'q' , then not 'q'.
Please answer all questions. I really need help! Thank you
For the quadratic equation:
x^2 + 7x = 8x + 12
The two solutions are:
x = 4
x = -3
How to find the zeros of the quadratic equation?I'm only solving the first question, as it is how the guidelines say.
Here we have the quadratic equation:
x^2 + 7x = 8x + 12
First, we can rewrite this equation as:
x^2 + 7x - 8x - 12 = 0
x^2 - x - 12 = 0.
Using Quadratic formula we can see that the solutions (or zeros of the quadratic) are:
x = (1 ± √( (-1)^2 - 4*1*-12))/(2*1)
x = (1 ± 7)/2
Then the two solutions are:
x = (1 + 7)/2 = 4
x = (1 - 7)/2 = -3
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If Maggie corrected her mistake, what would be the correct answer for x?
correct value of x will 9 if Maggie corrected her mistake.
WHAT IS LINEAR EQUATION ?When the greatest power of the variable is consistently 1, an equation is considered to be linear. A one-degree equation is another name for it. The typical form of a linear equation with one variable is Ax + B = 0. The variables x and A in this situation are variables, whereas B is a constant.
CALCULATIONApplying the parallel line theorem
alternate angles are always equal -
therefore ,
4x + 2 = 7x - 25
27 = 3x
x = 9
so , the correct value of x will be 9 if maggie corrected her mistake
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(Laws of Exponents with Integer Exponents LC) Simplify (34)−1. one over three raised to the fourth power one over three raised to the power of negative four −34 33
The simplified value of (3⁴)⁻¹ is 1/(3⁴) , which means one over three raised to the fourth power , the correct option is (a) .
In the question ,
the expression is given as (3⁴)⁻¹ ,
the rule of law of exponents states that a⁻ⁿ = 1/aⁿ .
Using the above mentioned law of indices , the expression (3⁴)⁻¹ can be written as ,
(3⁴)⁻¹ = 3⁻⁴ = 1/3⁴
which can be expressed in words as one over three raised to the fourth power .
Therefore , the simplified value of (3⁴)⁻¹ is 1/(3⁴) , which means one over three raised to the fourth power , the correct option is (a) .
The given question is incomplete , the complete question is
The Simplified value of (3⁴)⁻¹ is
(a) one over three raised to the fourth power
(b) one over three raised to the power of negative four
(c) −3 to the power of 4
(d) 3 to the power of 3
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The Jules Server Scholarship Fund gives a graduation award of
$250.00 to a graduating senior at North End High School. Currently the
fund has a balance of $8300.00 in an account that pays 2.2% interest
compounded annually. Will the amount earned in annual interest be enough
to pay for the award?
The compound interest of $182.60 will not be enough to pay for the award.
What is compounding?Compounding is the process by which interest is added to both the principal balance already in place and the interest that has already been paid. Thus, compounding can be thought of as interest on interest, with the result that returns to interest are magnified over time, or the so-called "miracle of compounding." For instance, if you deposit $1,000 in an account that offers 1% yearly interest, after a year you would have received $10 in interest.So, annual interest will be sufficient to serve the award:
Compound interest of $83020.00 at the annual interest of 2.2% for 1 year will be $182.60.The total amount after 1 year will be $8482.60.(Refer to the compound chart given below)
Interest will be $182.6 and the graduation award is $250.00, so the interest will not be enough to pay for the award.Therefore, the compound interest of $182.60 will not be enough to pay for the award.
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Growing linearly, the balance owed on your credit card triples from $500 to $1500 in 9 months. If the balance were growing according to the exponential function f(x)=500(1+0.13)x where x represents the number of months, what would the balance be after 9 months? Round your answer to the nearest cent.
If the balance were growing according to the exponential function, the balance owed on your credit card after 9 months is equal to $1,502.02.
What is an exponential function?In Mathematics, an exponential function simply refers to a mathematical function whose values are generated by a constant that is raised to the power of an argument.
From the information provided, an exponential function that models or represents the rate at which the balance owed on your credit card triples is given by:
f(x) = 500(1 + 0.13)^x
Where:
f(x) represents the balance owed on your credit card.x represents the number of months.After 9 months, the balance owed on your credit card would be calculated by substituting the value of x with 9 as follows:
Balance owed, f(x) = 500(1 + 0.13)^9
Balance owed, f(x) = 500(1.13)^9
Balance owed, f(x) = 500 × 3.0040419380
Balance owed, f(x) = $1,502.02.
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Complete Question:
Growing linearly, the balance owed on your credit card triples from $500 to $1500 in 9 months. If the balance were growing according to the exponential function f(x) = 500(1 + 0.13)^x, where x represents the number of months, what would the balance be after 9 months? Round your answer to the nearest cent.
Answer:
$1502.02
Step-by-step explanation:
f(x)=500(1+0.13)^x
f(9) = 500(1.13)^9
f(9) = 500(3.004041938)
f(9) = 1502.02
Answer: $1502.02
I honestly forgot about this lol please revive my brain
Given:
[tex]y=4x[/tex]To draw the graph:
Let us find the slope as the ratio.
Comparing the given equation with y=mx+c
So, the slope m=4.
In ratio,
[tex]\frac{\text{Change in y}}{\text{change in x}}=\frac{4}{1}\Rightarrow4\colon1[/tex]Let us take two points, (0,0) and (1,4).
So, the graph is,
The square root of a number is between seven and eight .which could be the number?
Answer: 51
Step-by-step explanation:
an elementary school is offering 3 language classes: one in spanish, one in french, and one in german. the classes are open to any of the 100 students in the school. there are 28 students in the spanish class, 26 in the french class, and 16 in the german class. there are 12 students that are in both spanish and french, 4 that are in both spanish and german, and 6 that are in both french and german. in addition, there are 2 students taking all 3 classes.
Using Venn diagram, if a student is chosen randomly, (a) the probability that he or she is not in any of the language classes is 0.5, (b) the probability that he or she is taking exactly one language class is 0.32, and (c) if 2 students are chosen randomly, the probability that at least 1 is taking a language class is 0.753.
Venn diagram is a diagram used to present the relationship between sets in a logical form. (See attached image)
Let A = students in the Spanish class = 28
B = students in the French class = 26
C = students in the German class = 16
Hence, the probability of each class is:
P(A) = 28/100 = 0.28
P(B) = 26/100 = 0.26
P(C) = 16/100 = 0.16
P(A ∩ B) = 12/100 = 0.12
P(B ∩ C) = 6/100 = 0.06
P(A ∩ C) = 4/100 = 0.04
P(A ∩ B ∩ C) = 2/100 = 0.02
(a) P(not A, B, C) = 1 - P(A ∪ B ∪ C)
P(not A, B, C) = 1 - [P(A) + P(B) + P(C) - P(A ∩ B) - P(B ∩ C) - P(A ∩ C) + P(A ∩ B ∩ C)]
P(not A, B, C) = 1 - (0.28 + 0.26 + 0.16 - 0.12 - 0.06 - 0.04 + 0.02)
P(not A, B, C) = 1 - 0.5
P(not A, B, C) = 0.5
(b) P(A, B, C only) = P(A only) + P(B only) + P(c only)
P(A, B, C only) = [P(A) - P(A ∩ B) - P(A ∩ C) + P(A ∩ B ∩ C)] + [P(B) - P(A ∩ B) - P(B ∩ C) + P(A ∩ B ∩ C)] + [P(C) - P(B ∩ C) - P(A ∩ C) + P(A ∩ B ∩ C)]
P(A, B, C only) = (0.28 - 0.12 - 0.04 + 0.02) + (0.26 - 0.12 - 0.06 + 0.02) + (0.16 - 0.06 - 0.04 + 0.02)
P(A, B, C only) = 0.14 + 0.10 + 0.08
P(A, B, C only) = 0.32
(c) P = 1 - (50/100 x 49/99)
P = 1 - (49/198)
P = 149/198
P = 0.753
To complete the problem, here are the questions:
(a) If a student is chosen randomly, what is the probability that he or she is not in any of the language classes?
(b) If a student is chosen randomly, what is the probability that he or she is taking exactly one language class?
(c) If 2 students are chosen randomly, what is the probability that at least 1 is taking a language class?
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