Mathematics College

Use the elimination method by subtraction to solve for x and then y.
Equation 1 > 2x - 7y = -74
Equation 2 > 3x - 7y = -83
Solve for x and y.
Please and thank you!​

Answers

Answer 1

Answer:

Step-by-step explanation:

Both equations have -7y. You can eliminate them by subtracting one equation from the other:

Multiply equation 1 by -1, then add it to equation 2:

-2x + 7y = 74

3x - 7y = -83

———————

x = -9

2x - 7y = -74

2(-9) - 7y = -74

-7y = -56

Y = 8

(x,y) = (-9, 8)

Related Questions

A rectangular prism has a length of 11 centimeters, a height of 13 centimeters, and a width of 2 centimeters. What is its volume, in cubic centimeters?

Answers

Answer:

286 cm

Step-by-step explanation:

Answer:

286 centimeters³

Step-by-step explanation:

identify variable:   L=11    W=2      H=13

use volume of a rectangular prism formula:   V=LWH

substitute variables into formula:         V=(11)(2)(3)

V=286 cm³

james jogged around the track 0.68 hours at an average speed 28.9 miles per hour how far did he jog?

Answers

Answer:

Step-by-step explanation:

0.68hr(28.9mi/hr)=19.652mi

PRETTY MUCH A FREE BRAINLIEST IF UR RIGHT, GOOD LUCK :D. Value of x is greater than or equal to 14

Options:

x>14

x<14

x≥14

x≤14

Answers

Answer:

3rd choice down. . . . . . .

x≥14  plz give me brainlyest

ramu and ravi borrowed rs 8000​

Answers

Answer: Rs. 11,520

Step-by-step explanation:

As the method of compounding is not stated, the default of simple interest will be used.

Simple interest is a fixed amount that is paid over the course of the loan and is based on the original amount borrowed.

Formula is:

Amount owed = Amount borrowed * ( 1 + rate * time)

= 8,000 * ( 1 + 8% * 5.5 years)

= 8,000 * 1.44

= rs 11,520

. Use 3.14

plss help ​

Answers

Answer:

A≈494.13

R = 12.54

D = 25.08

Step-by-step explanation:

Here is all the answers.

PLZZZZ give me brainliest!!!

Need answers right away due tonight please. Geometry composite shapes.

Answers

3x32=96
96x6=576
I think it says 32 if not the just change it to what it does say

HELPP!! I report wrong answers!!

Answers

A : 12+1.5x=26 :))))

PLSSS hurry this is on my EXAM



A family installs and fills an aboveground pool. The swimming pool costs $850 to install, and it costs $75 per thousand gallons of water to fill.
Which function represents the total cost, C, of installing and filling a pool with 2 thousands of gallons of water?

Answers

Wouldnt that just be 75x2? bc if so then

The answer is:

75x2=150+ 850=1000

Find the value of −12 + 8 −(−9). Question 20 options: −13 −5 13 5

Answers

Answer:

D) 5

Step-by-step explanation:

-12 + 8 + 9 = 5

Nathan bought 4 pounds of chicken for $8. How many pounds can he buy for $20? *

Answers

Answer:

The correct answer is 10 pounds of chicken

Step-by-step explanation:

First you do 8 divided by 4 to equal the unit price of 1 pound of chicken for 2 dollars then you do 20 divided by 2 to equal 10 pounds of chicken for 20 dollars

HAVE A GOOD DAY!

For which value of k does the system has no solutions?
Equation:
3x + y = 4
kx + y = −2
Answers:
A: -3
B: -2
C: 3
D: 4

Answers

Answer:

The answer to this question is 4

Step-by-step explanation:

.
-2x-6y= 36-4x
2(3x - 3y) =36
4x-6y + 36 = -2x

Answers

Answer:

a67y.....................

Select all the statements that are true about the triangles

Answers

Answer: yeah sry i need point

Step-by-step explanation:

a triangle has angles that measure 50 degrees and 50 degrees what is the measure lf the third angle?​

Answers

Answer:

80

Step-by-step explanation:

the combined angles of any triangle equal 180 degrees. take the known angles ( 50 and 50) and subtract their sum from 180. 180-100=80

Tamar surveyed six friends, asking each how many times he or she had ridden in a helicopter. The numbers of times she recorded were 0, 0, 0, 1, 3, and 8.

What is the mean absolute deviation of the number of times?

Round to the nearest tenth, if needed.


a. 0

b. 2

c. 2.3

d. 2.5

Answers

well, to do this we first need to find the mean of all values.

we need to find the distance of each value from that mean (subtract the mean from each value, ignore minus signs)

Then find the mean of those distances.

so, after we do all of that with the given numbers, our final result would be 2.333333333..... (It goes on) we round it up to 2.3, and viola! the answer is C.

Answer: the answer is c

Step-by-step explanation: i took the test

Simplify the following expression.

Answers

Answer:

x^(4/21)

Step-by-step explanation:

What’s the answer to 7x when x=8 I need help please

Answers

Answer:

56

Step-by-step explanation:

7x8=56

Step-by-step explanation:

7(8)

= 56

use tye substitution property

During a competition, numismatist Aditi has been given Rs. 200 in Rs.1 denominations. The judge asks Aditi to allocate the Rs. 1 denominations into a number of pouches such that any amount required between Rs.1 & Rs. 200 can be given by giving out a certain number of pouches without opening them. Aditi thinks and asks the judge to give her 'x' number of pouches to keep the money, where 'x' is the minimum number of bags required to keep the total money. Can you guess the value of 'x'?

Answers

9514 1404 393

Answer:

  8

Step-by-step explanation:

If the bags can either be given or not, each bag can assume one of two states. In order for there to be 200 possible combinations of items in one of two states, there must be at least log2(200) = 7.64 items. The minimum number of bags is x = 8.

_____

The contents of the 8 bags will be Rs. 1, 2, 4, 8, 16, 32, 64, 73.

Please help, will give brainliest! Which is NOT equivalent to this expression? 4(3x^2+6x)

Answers

12x^2+6x is not equivalent

Help for brainiest
please explain how you got it :D it would help so I can understand how to do the rest

Answers

Answer:

Option D

Step-by-step explanation:

Formula to use: V=[tex]\frac{1}{2}(b*a)*h\\[/tex]

b=base of triangle   a=altitude of triangle  h=height of prism

Doing [tex]\frac{1}{2}(b*a)[/tex] is essentially finding the area of the triangle and after multiplying by h will give you the volume of the triangular prism.

Solve: V = [tex]\frac{1}{2}(3*3)*7[/tex]  or option D

Ps. Altitude is perpendicular or 90 degrees to the side I used for the base, so it wouldn't be option C.

The owner of a restaurant is concerned about customers who ask for a water cup when placing an order but fill the cup with a drink from the beverage fountain instead of filling the cup with water. The owner randomly selected 90 people who order a water cup and found that 21 of those customers filled the cup with a soft drink.a. Construct and interpret a 95 percent confidence interval for the proportion of all customers who, having asked for a water cup when placing an order, will fill the cup with a soft drink from the beverage fountain. b. The owner estimates that each customer who asks for a water cup but fills it with a soft drink costs the restaurant $0.35. Suppose that in the month of June 2,500 customers ask for a water cup when placing an order. Use the confidence interval constructed in part (a) to give an interval estimate for the cost to the restaurant for the month of June from the customers who ask for a water cup but fill the cup with a soft drink.

Answers

Answer:

This is very confusing.

Can you try and make this a shorter question for me to answer?

Step-by-step explanation:

I need the answer for this one please

Answers

Answer:

Step-by-step explanation:

65

What is the value of x in the figure below?

Answers

Answer:

x = 25°

Step-by-step explanation:

The sum of interior angles in a triangle is equal to 180°

The given triangle is a right triangle which means one of its angle has a measure of 90°

since thd other angle is given as 65 to calculate x we just add the given measures and subtract it from 180

90° + 65 + x = 180

155 + x = 180 subtract 155 from both sides

x = 25°

Find the measure of the arc.
D
А
146°E
B
mĒDF = [?]°
Enter

Answers

Answer: 214

hope this helped.

The measure of the arc is 214 degrees

What is Circle?

A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre.

The measure of the arc FE is 146 degrees.

Measure ED is 90 degrees.

To find the measure of the arc EDF we have to find the measure of DF.

146+90+x=360

236+x=360

Subtract 236 from both sides

x=360-236

x=124

Now let us find the arc measure EDF =Measure of ED + Measure of DF

=90+124

=214 degrees

Hence, the measure of the arc is 214 degrees

To learn more on Circles click:

https://brainly.com/question/11833983

#SPJ7

19.214÷13
pls someone help me

Answers

Answer:

1.478

Step-by-step explanation:

If you are given the diameter, how can you calculate the radius

Answers

Answer:

divide the diameter by 2

AY
1500-
1400
1300
Optional: How much compound
interest is earned at 35 years?
(looks to be in the middle)
compound interest
Total amount (dollars)
1200
1100
1000
900
800
700
600
500
400
300
200
100
Optional: How much simple
interest is earned at 35 years?
(looks close to the whole number)
simple interest
(a) How much more compound
interest than simple interest is
earned after 35 years?
0
5 10 15 20 25 30 35 40 45 50
Number of years

Answers

ok but ok 56 years middle age kid

Answer:

How much compound interest is earned at 35 years? 850

How much simple interest is earned at 35 years? 600

How much more compound interest than simple interest is earned after 35 years? 250

Step-by-step explanation:

A cheerleading team practices each week for 375 minutes. The team practiced for 26 weeks during the year. How many minutes did the team practice during the year?

Answers

Answer:

9750 min or 162.5 hours

Step-by-step explanation:

375 times 26 = 9750

Answer:

C) 24 cheerleaders

Step-by-step explanation:

20 last year

subtract 3 for those who decided not to join

20 -3 = 17

add 7 for those who joined

17 + 7 = 24

there are 24 cheer leaders

hope it help

Miguel is a boxer. He had to decrease his weight by 4%
to 160 pounds in order to fight in this weight class.
What was his starting weight? Round his weight to the
nearest hundredth. Show your work.

Answers

Answer:

166.66 pounds

Step-by-step explanation:

160/0.96=166.66667

This is how I remember doing these questions

-3/4 ( 8y - 12 ) + 1/5 ( 15y - 30 )

Answers

I think it is......
-3(y-1)
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