Question

Evaluate the expression without using a calculator.



71 • 9



A.
549


B.
639


C.
719


D.
720

Answer 1

first multiply 1 by 9
then multiply 70 by 9

and add the 2 results

Answer 2

so ummm what is the answer

Answer 3

the answer is 630 right :D

Answer 4

71*9=(70+1)*9=70*9+1*9=630+9=?

Answer 5

well 1*9 = 9 and 70 * 9 = 630

Answer 6

639???????

Answer 7

yeah 639

Answer 8

360+9=639

Answer 9

Yes it's "b" 639

Answer 10

What is the solution to the equation?

7(5 + 9) = 7 · x + 7 · 9



A.


x = 1


B.


x = 5


C.


x = 7


D.


x = 9

Answer 11

a(b+c)=ab+ac