2 years ago

-x+2y=9 -7x-2y=-1 Solve each system by elimination

1 answer:

5 0

X - 2y = - 9
7x + 2y = 1

x - 2y = - 9
(+)
7x + 2y = 1
___________
8x = - 8

x = - 1

- 1 - 2y = - 9
2y = 8
y = 4

i am a mathematics teacher. if anything to ask please pm me

You might be interested in

Plzzzz help asap lost ten u gain it asap

faltersainse [42]

Your unit cost will be $0.11 :)

7 0

2 years ago

Darryl earns $10 per hour tutoring students. if Darryl tutored for 25 hours this month, how much money did he earn this month

Ksju [112]

Answer:

danny makes 250 per month

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers

U= 2a - 2. solve for a

Sonja [21]

Answer: a = $\frac{u+2}{2}$

We want to isolate a. Add both sides by 2. Then we get u + 2 = 2a. To get just a, we can divide by 2 to get (u+2)/2.

Hope that helped,

-sirswagger21

8 0

3 years ago

Read 2 more answers

I need help with this assignment. This is the last one for the year so I can get my geometry credit! Thank you to anyone who cho

kirill [66]

Answer:

i can help u just give me the work

Step-by-step explanation:

5 0

2 years ago

Rebecca is making bracelets to sell at a charity event. Each bracelet takes 1 1/4 of a foot of embroidery floss to make.If Rebec

Ivan

Answer:

Step-by-step explanation:

She has 15 feet of floss. 15/1.25 is 12.

Hope this helps!!

4 0

2 years ago

Read 2 more answers