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blagie [28]
2 years ago
8

Simplify the following expression. show your work. (-y + 5.3) + (7.2y - 9)

Mathematics
1 answer:
Kitty [74]2 years ago
6 0

Answer:

6.2y - 3.7

Step-by-step explanation:

−y+5.3+7.2y−9

Subtract 9 from 5.3 to get −3.7.

−y−3.7+7.2y

Combine −y and 7.2y to get 6.2y.

6.2y−3.7

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D=[-1,1]

a. D=[-1,1] or from -1 to 1 is domain


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A. domain is from -1 to 1
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Write and solve a system of equations. Be sure to label the variables. The sum of two numbers is twelve. Two times the first num
adoni [48]

The solution to the system of equations is x = 8, y = 4.

<h3>How to write the system of equations?</h3>

First, let's define our variables as x and y.

"the sum of two numbers is twelve" is written as:

x + y = 12

"two times the first number minus three times the second number is four" is written as:

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Then the system of equations is:

x + y  = 12

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<h3>How to solve it?</h3>

First, we isolate one of the variables in one equation, I will isolate x on the first one to get:

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Now we replace this on the other equation, so we get:

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If you want to learn more about systems of equations, you can read:

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