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PLEASE HELP ME!?!?!?!?!​

PLEASE HELP ME!?!?!?!?!​-example-1

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Part 1:

A. Like terms must have the same variable and exponent.

B. Give an example of two terms that cannot be combined: 7c and 4b

C. Write one complete sentence to explain why the two terms you wrote cannot be combined: 7c and 4b cannot be combined because they have different variables, and are therefore not like terms.

D. Use distributive property: 2(-4 + 6.1) + 3(5 - x)

2 * -4 = -8

2 * 6.1 = 12.2

-8 + 12.2 + 3(5 - x)

3 * 5 = 15

3 * x = 3x

-8 + 12.2 + 15 -3x

-8 + 12.2 = 4.2

4.2 + 15 = 19.2

19.2 - 3x is the simplest version.

Part 2:

A. Thor is wrong because, in step 4, he subtracted to isolate the variable when he should have divided.

B. 4x + 9 = 6

Step 1: 4x + 9 - 9 = 6 - 9

Step 2: 4x = -3

Step 3: 4x/4 = -3/4

Step 4: x = -0.75

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