So I think the rule is that you divide two exponents with the same base, you keep the base and subtract the powers.
Answer:
7x + 15x= 21x
Step-by-step explanation:
7x + 15x
= (7 + 15)x
= 22x
13x - 11y = -12
-13x -13x
___________
-11y = -13x - 12
___ ______
-11 -11
-13x -12
y = _______
-11
Answer:
210
Step-by-step explanation:
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7.8=rational because rational numbers are numbers that can be in a fraction decimal whole etc.