Mathematics College

(3х — у = 2
(x+2y = 3
if someone can help me with solving with system of elimination please that would be amazing​

Answers

Answer 1

Answer:

x=1 y=1

Step-by-step explanation:

You want to chose either x or y to cancel out of both equations. I chose y, so I multiplied the entire equation of 3x-y=2 by 2 to get 6x-2y=4

6x-2y=4

x+2y=3

The -2y and 2y cancel each other out, the 6x and x can be added, and the 4 and 3 can be added.

7x=7

x=1

Now that we know x=1, plug in x to one of the original equation.

1+2y=3

2y=2

y=1

Related Questions

find the total surface area of the prism. geometry hw. plz help me

Answers

Answer:

152

Step-by-step explanation:

Hello there!

The prism shown is a triangular prism

There are many different formulas for solving for the surface area of a triangular prism but I am going to use the most simple one

Formula: SA = bh + L(s1 + s2 + s3) (found in the image)

b = base length

h = height

L = length

s1 = (same thing as the base length)

s2 and s2 = other triangle side lengths ( the base is an isosceles triangle so they are equal to each other.)

The triangular prism has the following dimensions

b = 6

h = 4

L = 8

s2 and s3 = 5

Now that we have identified each dimension we plug in the values into the formula

SA = 6*4 + 8(6+5+5)

6*4=24

8*6=48

8*5=40

40*2=80

80+48=128

128 + 24 = 152 so the surface area of the triangular prism is 152 cm²

A 15-g sample of radioactive iodine decays in such a way that the mass remaining after t days is given by
m(t) = 15e−0.055t,
where
m(t)
is measured in grams. After how many days is there only 1 g remaining? (Round your answer to the nearest whole number.)

Answers

Answer:

Step-by-step explanation:

SHUIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIT

The following is a list of a student's scores on his Spanish test. 71,69, 65, 84, 82, 95 Which box plot represents this data?

Answers

The box which represents this data is Minimum: 65

Q1: 69

Median: 82

Q3: 110

Maximum: 95

We are given that;

71,69, 65, 84, 82, 95

Now,

A box plot is a type of chart that shows the five-number summary of a set of data: the minimum, first quartile, median, third quartile, and maximum. To make a box plot, you need to follow these steps 1:

Arrange the data from smallest to largest.

Find the minimum and maximum of the data. These will be the endpoints of the whiskers.

Find the median of the data. This will be the vertical line inside the box.

Find the first quartile (Q1) and the third quartile (Q3) of the data. These will be the lower and upper edges of the box.

Find the interquartile range (IQR) by subtracting Q1 from Q3. This is the length of the box.

Find the lower and upper limits by subtracting 1.5 times IQR from Q1 and adding 1.5 times IQR to Q3. These are the boundaries for detecting outliers.

Draw a box from Q1 to Q3 with a vertical line at the median. Draw whiskers from the box to the minimum and maximum values that are within the lower and upper limits. Mark any outliers with dots or asterisks.

Therefore, by algebra the answer will be

Minimum: 65

Q1: 69

Median: 82

Q3: 110

Maximum: 95

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Solve the equation used to find the area of trapezoid for h A=1/2h(x+y)

Answers

A=1/2*h(x+y)
Make h subject of formula
2A=h(x+y)
h=2A/(x+y)

A. using substitution find the value of the remaining unknown in each of the following formulas.

1.t=rs (s + 1) if r=4 and s=5
2.k=6-5q/2g if q=3 and g=8
3.p=a+b-2c if a=2, b=-1 and c=5
4.l=1/x - 2/y + z if x=4, y=6, and z=2/3

Answers

Answer:

Substitution means that we need to replace some of the variables by the given values.

1)  t = rs*(s + 1)      (if r=4 and s=5)

So we just need to replace r by 4 and s by 5 in the equation.

t = 4*5*(5 + 1) = 20*6 = 120

t = 120

2)  k = 6 - 5q/2g     (if q=3 and g=8)

We need to replace q by 3, and g by 8.

k = 6 - (5*3)/(2*8) = 6 - 15/16 = 5.167

k = 5.167

3) p = a + b - 2c   (if a = 2, b = -1, c = 5)

Replacing the variables we get:

p = 2 + (-1) - 2*(5)

p = 2 - 1 - 10 = -9

p = -9

4) I = 1/x - 2/y + z   (if x = 4, y = 6, and z = 2/3)

Replacing the variables we get:

I = 1/(4) - 2/(6) + (2/3)

I = 1/4 - 2/6 + 2/3 =  1/4 - 1/3 + 2/3

I = 1/4 + 1/3 = 3/12 + 4/12 = 7/12

I = 7/12 = 0.583

Find the volume of the sphere. Round to the nearest tenth.

The volume is about _____ cubic meters.

Answers

Could You explain more I cannot Under stand Or see the Picture

Simplify 4^3 • 4^5
a 4^8
b 16•15
c 4^15
d 16^8

Answers

Answer:

4^8

Step-by-step explanation:

keep base (which is 4) and add exponents when multiplying

40 POINTS !! 40 POINTS !!

PLEASE HELP , DONT SKIP !

NO LINKS OR FILES.

Answers

Answer:

Its only 5 point but ok

its $3.44 per quart

Step-by-step explanation:

Identify all the two-dimensional figures that are cross-sections for each of the three-dimensional solids.
Cube

pentagon
square
triangle
rectangle
octogon
hexagon
trapezoid

Answers

Answer:

square, triangle, trapezoid,rectangle

The Two-dimensional figures are square, triangle, rectangle, and trapezoid.

What are two-dimensional figures?

Two-dimensional shapes do not have any thickness and can be measured on only two faces. These can be drawn on a sheet of paper with the constitution of two axises only.

The Two-dimensional figures that are cross-sections for each of the three-dimensional solids are:

squaretrianglerectangletrapezoid

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A jar contains 40 balls numbered 1 through 40. Three balls are removed without being returned to the jar, and the numbers are written down in order. How many sequences of numbers are possible?

Answers

Answer:59280

Step-by-step explanation: Perumtaion of (40,3)

The required possible number of sequences is given as 59280.

Given that,
A jar contains 40 balls numbered 1 through 40. Three balls are removed without being returned to the jar, and the numbers are written down in order.

What are permutation and combination?

In arithmetic, combination and permutation are two different ways of grouping elements of a set into subsets. In combination, the components of the subset can be recorded in any order. In a permutation, the components of the subset are listed in a distinctive order.

Here,
Total number of balls = 40
Number of balls selected = 3
Combination of sequence = 40P3
Combination of sequence = 59280

Thus, the required possible number of sequences is given as 59280.

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3. ELLIPSE
CENTER = (-1,2)
MAJOR AUIS IS HORIZONTAL
AND HAS LENGTH OF 10
PASSS THROUGH (-1,5)


4. HYPERBOLA
VERTICES : (-2,-4)
(-2,6)
FOU:(-2,-5)
(-2,7)

Answers

Answer:

FFFFFFFFFFFFFFFFFFFFFFFF

What is the length of ab?

Answers

Answer:

Step-by-step explanation:

I need help. This is due later today.

Answers

Answer:

D is one of them

Step-by-step explanation:

I need some help! I would really appreciate it!

Answers

Answer:

answer is A

Step-by-step explanation:

slope goes up positive 4 and it crosses the y intercept at 3 so yeg there ya go ig

which angles are congruent to each other​

Answers

Answer:

Angles that are vertical or across from each other are congruent or equal.

PLSSS If you spin the spinner 10 times, what is the best prediction possible for the number of times it will land on pink? ​

Answers

Answer:

3 times

Step-by-step explanation:

Probability of landing on pink:

P(pink) = number of pink / total number = 3/10

If spun 10 times then possible outcomes with pink:

3/10*10 = 3 times

Answer:

3 times, or [tex]\frac{3}{10}[/tex]

Step-by-step explanation:

There are 3 out of 10.

Which of the following is a true statement?
1/3 > 3/8
4/8< 8/24
4/8<9/16
4/16>3/8

Answers

We'll need to convert all the fractions to common denominators.

1/3 = 8/24

3/8= 9/24

4/8 = 12/24

8/24 stays the same.

4/8 = 8/16

9/16 stays the same.

4/16 stays the same.

3/8 = 6/16

Now we compare.

8/24 > 9/24 X

12/24 < 8/24 X

8/16 < 9/16 √

4/16 > 6/16

So the answer is C) 4/8<9/16

---

hope it helps

solve by addition -8x+2y=14 -4x+y=4​

Answers

Answer:Add the equations in order to solve for the first variable. Plug this value into the other equations in order to solve for the remaining variables.

No solution

Step-by-step explanation:

Answer:

Im not sure how to solve by addition but if you solve its it is no solution

Step-by-step explanation:

Hope this helps

HELP HELP GEOMETRY 15 points

Answers

Answer:

BC

_______________________________

A is wrong because radians really refers to the arc with respect to the angle. The opposite is true with A.

D is wrong because the arc is actually bigger than the radius given 1.5 radians.

E is wrong because the area of the whole circle is defined as 2π radians, 1.5 rad × 1.5 = 2.25 rad is (405/π)° and 2π radians is 360° (2π × 180 / π)°.

F is wrong because the circumference of a circle is 2πr.

THe halloween haunt estimated they would make $125,450 this year. They expect to make 23,700 more than last year by the time they close this year. How much money did they make last Year? help due at 11.59

Answers

Answer:

it is at least $300000 good luck

Geologists recorded the duration (in seconds) of over 500 recent eruptions of the Old Faithful geyser in
Yellowstone National Park. Here's a histogram showing the distribution of their data:
= 210
0.26
0.22
0.18
0.15
Relative frequency
0.11
0.07
0.04
0.00
75
300
150 225
Duration (seconds)
Suppose that we were to take random samples of 30 eruptions from this population and calculate į as the
sample mean duration of the eruptions in each sample.
Which graph shows the most reasonable approximation of the sampling distribution of ?

Answers

Answer: C (A unimodal histogram, and the dotted line lands at 210)

Step-by-step explanation:

Khan Academy - “The sample size is reasonably large (n = 30 _> 30), so the sampling distribution of x will be approximately normal even though the population isn’t.”

Will mark brainliest. Question is below.
A trash can is in the shape of a cylinder. It has a radius of 2 feet and a height of 5 feet. What is the volume of the trash can? Round to the nearest tenth. Use 3.14 for π or pi.

Answers

Answer:

62.8 cubic feet

Step-by-step explanation:

V = πr^2h

r is radius

h is height

Radius = 2ft

Height = 5ft

V = (3.14)(2)^2(5)

V = 62.8 cubic feet

Amar and his friends went to a movie at 3:55 P.M. The movie ended at 5:30 P.M.
How long was the movie?
The movie was
hour(s) and
minutes.
Amar got home 45 minutes after the movie ended.
What time did Amar get home?
Complete the explanation for how you found your answer.
You need to find
minutes after 5:30 P.M.
5:30 to 6:00 is
minutes, so 15 minutes more is
:15.

Answers

Answer: the movie was 1 hour and 35 minutes and Amar got home at 6:15 P.M.

Step-by-step explanation:

to find out how long the movie was you have to find the distance between the time frames 3:55 and 5:30.

3:55+1 hour= 4:55

4:55+5 minutes= 5:00

5:00+30 minutes= 5:30

Add the times to find how long the movie was.

This is how I found how long the movie was.

To find out when Amar got home you have to do the same thing as well.

5:30+30 minutes= 6:00

6:00+15 minutes= 6:15

Hope this helps!

How much more popcorn does the bigger box hold than the smaller box? cm^3

Answers

9514 1404 393

Answer:

  70 cm³

Step-by-step explanation:

Amanda's container holds ...

  V = LWH = (10 cm)(10 cm)(13.5 cm) = 1350 cm³

Mary's container holds ...

  (8 cm)(8 cm)(20 cm) = 1280 cm³

The larger box holds 1350 -1280 = 70 cm³ more popcorn.

help me solve this queston

Answers

TJohn's age is approximately 23.33 years, and Sharon's age is approximately 93.33 years.

And the correct graph is D.

To represent the given problem as a system of equations, we can use the following information:

John is 70 years younger than Sharon: j = s - 70

Sharon is 4 times as old as John: s = 4j

Let's plot the graph for this system of equations:

First, let's solve equation (2) for s:

s = 4j

Now substitute this value of s in equation (1):

j = s - 70

j = 4j - 70

3j = 70

j = 70/3

Substitute the value of j back into equation (2) to find s:

s = 4j

s = 4(70/3)

s = 280/3

The solution to the system of equations is j = 70/3 and s = 280/3

In the graph d, the solution to the system of equations is represented by the point (70/3, 280/3), which is approximately (23.33, 93.33) on the graph.

Therefore, John's age is approximately 23.33 years, and Sharon's age is approximately 93.33 years.

And the correct graph is D.

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WILL CHOOSE BRAINLY WHAT IS THE MEAN

Answers

Answer:

the mean is you need to make the photo bigger somehow so that people can see it

Step-by-step explanation:

Select the correct answer.
Tim works for a cell phone company and is testing their new biometric security feature.
He conducted a test in which 4,000 attempts were made to unlock the phone. Of the attempts to unlock the phone, 25% were made by someone other than the phone's
owner. The results of the test are shown in the table.
Total
Unlocked
2,418
232
Owner
Not the Owner
Total
Did Not
Unlock
582
768
3,000
1,000
4,000
2,650
1,350
What is the probability that someone who is able to unlock the phone using the biometric security feature is not the owner?

Answers

The probability that someone who is able to unlock the phone who is not the owner will be 5.8%. Then the correct option is D.

What is probability?

Its basic premise is that something will almost certainly happen. The percentage of favorable events to the total number of occurrences.

Tim works for a cell phone company and is testing their new biometric security feature.

He conducted a test in which 4,000 attempts were made to unlock the phone. Of the attempts to unlock the phone, 25% were made by someone other than the phone's owner.

The results of the test are shown in the table.

                             Unlocked               Did Not Unlock               Total

Owner                     2418                            582                           3000

Not the Owner        232                             768                            1000

Total                       2650                            1350                          4000

Then the probability that someone who is able to unlock the phone using the biometric security feature is not the owner will be

P = 232 / 4000

P = 0.058

The probability in percentage will be

P = 0.058 x 100

P = 5.8%

Then the correct option is D.

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Answer:

8.8%

Step-by-step explanation:

I did the test.

is negative 1 4/5 greater than negative 1 7/10

Answers

Answer:

no

Step-by-step explanation:

1 4/5 = 1 8/5 if you make a common denominator

The outlier has the greatest affect on the ___________.

Answers

Answer:

mean

Step-by-step explanation:

Write down an irrational number with a value between 6 and 7.​

Answers

Answer:

Three irrational numbers between 6 and 7 are

i )6.2020020002...

ii) 6.5010010001....

iii)6.9010010001.... etc.

•••♪

[tex] \huge\boxed{\mathfrak{Answer}}[/tex]

3 irrational numbers with a value between 6 & 7 can be :-

6.101001000....6.533533353333....6.122122212222...

Other Questions
Part B - Newton's Laws of Motion and Universal Gravitation The constellation Canis Minor has a binary star system consisting of Procyon A and Procyon B. Procyon A, at 3 x 1030 kg, has 2.5 times the mass of Procyon B; and they are roughly 2 x 1012 m apart. How does the force on Procyon A from Procyon B compare to the force on Procyon B from Procyon A? O 6.3FB on A O 2.5FB on A FA on B = O 1.3FB on A O FB on A O 0.4FB on A Submit Request Answer Part C - Newton's Laws of Motion and Universal Gravitation Considering the same stars as described in Part B, how does the acceleration of Procyon A compare to the acceleration of Procyon B as they orbit each other? O 6.3a3 O 2.5ap DA= O 1.3aR O 0.4ar Submit Request Answer Part D - Falling on other planets An astronaut is on the surface of a new planet that has a radius of 6.1 x 106 m (similar to Venus) and a mass of 6.4 x 1023 kg (similar to Mars). If she dropped her cell phone, what would be the free-fall acceleration of the phone? Recall that G=6.67 x 10-11 Nm/kg? Express vour answer to two sianificant figures and indicate the appropriate units The graph for a linear regression crosses the y axis in negative values. Where would the y-intercept of the regression line be located on the y-axis?a) Above 0b) Below 0c) To the right of 0d) To the left of 0 Which of the following statement is true for a 0.10 M solution of a weak acid HA at 25C?A. pH of solution = 1.00B. [HA] >> [A ]C. [HA] = [A ]D. [HA] = [H+ ]E. [A ] >> [OH ] A horizontal demand curve represents: a. Perfectly inelastic demand .b. Perfectly elastic demand. c. Unit elastic demand d. None of the above Suppose that a binary message-either 0 or 1-must be transmitted by wire from location A to location B. However, the data sent over the wire are subject to a channel noise disturbance, so, to reduce the possibility of error, the value 2 is sent over the wire when the message is 1 and the value -2 is sent when the message is 0. 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An increase in the quantity of labour and a corresponding decrease in leisure hours will have no effect on real GDP The regession model output of an autoregressive (AR2) model are shown below: Constant Coefficients 0.006503139 1.089593514 -0.09525277 Lag 1 Lag 2 Assume Lag 1 and Lag 2 are 1.0920 and 1.0910, respectively. The predicted value of the y-variable is closest to 1.0895 .0065 1.08927 O 1.09242 QUESTION 28 In a simple exponential smoothing (SES) model, the parameter a or Alpha is called the smoothing or decay factor. An Alpha of 0.95 means that more recent observations in a time series are given more weight than earlier observations. True O False Coronado Industries Equipment has actual sales of $800000 and a break-even point of $560000. How much is its margin of safety ratio? A. 43% B. 30% C. 70% D. 57% what is the equation of a line that is parallel to y=35x7 and passes through (15, 8)? enter your answer in the box. 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