Answer:
C, if someone else gets the same answer as me then its right
Step-by-step explanation:
The given expression is

49 is the square of 7 and 64 is the square of 8.
So we can write the given expression as


Answer:
x+y=5a
5a is added to b which is the sum of x and y multiplied by 3. That is, b=x+y×3=5a×3=15a
Since, 5a is added to b= 5a+15a=20a,
Answer: 
Step-by-step explanation:
Given expression: 
The law of exponents are given by :_

Using PEDMAS, first we solve division, we get

Now, using product law of exponent we get
