36, because the square root of 4 is 2 and the square root of 81 is 9. You multiply those and then double it to get 36.
Answer:
18.50 = total
4.07 = tip
Step-by-step explanation:
18.50 + 4.07 = 22.57
Answer:
y=1/10x+9
Step-by-step explanation:
i think, sorry if its wrong
Answer:
The product is the difference of squares is 
Step-by-step explanation:
Explanation
- The given expression is (5-3 x)(5+3x).
- We have to multiply the given expression.
- Square the first term 5. Square the last term 3x.

Answer:
B
Step-by-step explanation:
The answer is b, because if 5 and 10 are in the middle, you add them (15) then divide by 2, to get 7.5