Answer:
7a+2a=9a
Step-by-step explanation:
You distribute the a to each of the numbers in the parenthesis. Which means that you multiply. You should be left with a 7a+2a. Then since 7+2=9, your answer is 9a. So answer 1 is correct because they do these exact steps.
Answer:
6
Step-by-step explanation:
You have to multiply the two numbers.
2*4=6
4^21/5^6
Multiply the the powers through the parentheses.
Answer:
i jke it way fi naby qheisghb hjnssg ubg. jgb
5-(-4)
5 + 4 = 9
exceeds by 9