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3 years ago

use the elimination method to slove the system of equations.choose the correct ordered pair.6x+2y=8 12x+y=22

Mathematics

2 answers:

snow_tiger [21]3 years ago

8 0

Answer:

( 2, -2 )

Step-by-step explanation:

6x + 2y = 8 divide everything by -2

-3x - y = -4

12x + y = 22 Add the two equations together

9x + 0 = 18 divide by 9

x = 2

plug the x value into either equation to find y

12(2) + y = 22

24 + y = 22

y = -2

verify your result with the other equation

6(2) + 2(-2) = 8

12 - 4 = 8

8 = 8 verified.

Gelneren [198K]3 years ago

4 0

Answer: use photo. math

Step-by-step explanation:

boom

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A rectangle has a length that is 9 feet less than four times its width. Its area is 90 square feet

kramer

Answer:

The length of rectangle is $15\ ft$

The width of rectangle is $6\ ft$

Step-by-step explanation:

Let

x-----> the length of rectangle

y----> the width of rectangle

we know that

The area of rectangle is equal to

$A=xy$

$A=90\ ft^{2}$

$90=xy$ -----> equation A

$x=4y-9$ -----> equation B

substitute equation B in equation A and solve for y

$90=(4y-9)y$

$4y^{2}-9y-90=0$

using a graphing calculator

The solution is

$y=6\ ft$

Find the value of x

$x=4y-9$ -----> $x=4(6)-9=15\ ft$

5 0

4 years ago

Trying to do this question.

Naily [24]

The algorithm is tripping! It won't let me post a legit explanation. Sorry!

8 0

2 years ago

A graph passes through the points (0, 2), (2, 6), and (3, 12). Does this graph represent a linear function or a non-linear funct

pychu [463]

A linear function is <span>the answer</span>

5 0

3 years ago

Solve the equation. <br><br> 6x+7=8x−15

katen-ka-za [31]

You need to change around the values so that the letters are on one side whereas numbers on the other:

15 +7 = 8x - 6x
22 = 2x
x = 11.

Hope This Helps!

4 0

3 years ago

Read 2 more answers

P^2+13p+40/p-1 * 1/p+8

Ostrovityanka [42]

p3 + 13p2 + 8p + 39
———————————————————
p

6 0

3 years ago