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andriy [413]
2 years ago
14

Please help me its about Solving by substitution

Mathematics
1 answer:
Vera_Pavlovna [14]2 years ago
3 0

Answer:

x=-2 y=3

Step-by-step explanation:

The substitution is basically given to you. Exchange x from the second equation with y-5

Once that is done and you combine the parentheses you get:

2y-10+y=-1

Add 10 on both sides of the equal sign

You get:

3y=9

Divide both sides by 3

You get:

y=3

To check your work you can substitute y in the second equation with 3 and solve it that way to get x=-2 (x equals negative two)

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gavmur [86]
If she starts with $8000, she has only $7000 to go.This is reduced by $850 per month.
$7000 - $850x
8 0
3 years ago
Two mechanics worked on a car. the first mechanic worked for 10 hours, and the second mechanic worked for 15 hours. together the
Yuliya22 [10]
Let x and y be the rate per hour for Mechanic 1 and 2 respectively.

Then,
x+y=205 ---------- (1)
Additionally,
10x+15y = 2500 ------ (2)

Solving equations 1 and 2;
Multiply (1) by 10 and subtract two from the result,
10x+10y = 2050
10x +15 y =2500
----------------------
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3 0
3 years ago
PLEASE HELP!!!!!!!!!<br> Make sure you show all your work for full points. What is o?
Pie

Answer:

  o = 54

Step-by-step explanation:

The angle sum theorem tells you the sum of angles in a triangle is 180°. The definition of a linear pair tells you the two angles of a linear pair total 180°. Together, these relations tell you that an exterior angle of a triangle is equal to the sum of the remote interior angles.

In this geometry, the angle marked 78° is exterior to the left-side triangle. That means ...

  78° = o° +24°

  o° = 78° -24° = 54°

The value of 'o' is 54.

__

<em>Additional comment</em>

n° is the supplement of 78°, so is 102°.

m° is the difference between 102° and 22°, so is 80°.

6 0
2 years ago
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An art supply store buys paintbrush sets for $2 and sells them at a markup of 240%. One day, they decide to put the sets on sale
pav-90 [236]

Answer:

A. <em>6.12</em>

Step-by-step explanation:

if you mark up 2.00$ with 240% you get 6.80 $

then, 0.68 is 10% of 6.80%

if you subtract 0.68 your answer will be 6.12$

So your answer is A. 6.12$

5 0
1 year ago
Read 2 more answers
PLEASE HELP ME
irina [24]
Answer: pt 2 HOPE THIS HELPS!
7 0
2 years ago
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