Distribute the negative sign

Combine like terms
-9x^2 + 7x^2 = -2x^2
9x - 3x = 6x
13 - 6 = 7

<u>Answer</u>

Answer:
6.5
Step-by-step explanation:
you take the sides all added up (which was 13in) and divided it by two
Answer:
Rule= Y × 10
or
X ÷ 10
Step-by-step explanation:
Answer:
Step-by-step explanation:
The pH of solution a decreases, as the pH of solution B decreases as well.