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gtnhenbr [62]
4 years ago
6

Use substitution to solve the system of equation. 2x+2y=8 x+y=-2

Mathematics
1 answer:
eimsori [14]4 years ago
5 0

Answer:

Step-by-step explanation:

find the value of y in the second equation

x + y = -2,

but y = -2-x as well

so take the value that we have found for (x) into the first equation

2x + 2(-2-x)= 8

-2x + -4-2x = 8

-4x-4=8

-4x = 12

x=-3,

now just substitute x value into either equation

x + y =-2

-3 + y = -2

y =1

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100 kilometers you solve with a proportion 2/20=10/x
2x=200 so x=100
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3 years ago
An object of mass 600 kg is released from rest 1000 m above the ground and allowed to fall under the influence of gravity. Assum
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15 sec

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let m = 600 kg

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The length of a rectangle is twice its width. if the area of the rectangle is 200 yd2 , find its perimeter.
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7 0
3 years ago
Read 2 more answers
Solve for x. will give brailiest<br><br> 2x + 5 = 27<br><br> 8.5<br><br> 11<br><br> 16<br><br> 64
Rama09 [41]
<span>2x + 5 = 27
subtract 5 to both sides
2x + 5 - 5 = 27 - 5
simplify
2x = 22
divide both sides by 2
2x/2 = 22/2
simplify
x = 11

answer is </span><span>11 (second choice)
</span>
hope that  helps
4 0
3 years ago
Dana and Monique are dog groomers. Dana’s workday is 10 hours and Monique’s workday is 8 hours. Dana and Monique each work 40 ho
Lana71 [14]

Answer:

$127.50

Step-by-step explanation:

To answer this you will need to figure out how many days each person is working each week based on their number of hours and how many hours they work.  Use this to determine the number of dogs groomed and then multiply by the hourly rate.

Dana works 4 days (40/10) and Monique works 5 days (40/8).

Dana:  15 dogs per day x 4 days a week x $12.75 per dog = $765 a week.

Monique: 10 dogs per day x 5 days a week x $12.75 per dog = $637.50 a week.

765 - 637.50 = $127.50.

The difference is $127.50.

3 0
2 years ago
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