Commutative Property is used here
My work and the answer is shown up in the picture.
I used the substitution method to check my answers by using x and y into the two equations.
Answer:
Question one is b or 5. Because if you divide 64 by 4, you get 16. When you divide 80 by 16, you get 5.
Question two is d and e.
Seems to me like the question is: What are the two numbers ?
They have to multiply to 2,800 .
It's fairly easy to find two numbers that do that, BUT ...
they're not supposed to be multiples of 10 .
1 x 2,800 = 2,800 . . . . . No good. 2,800 is a multiple of 10 .
2 x 1,400 = 2,800 . . . . . No good. 1,400 is a multiple of 10 .
4 x 700 = 2,800 . . . . . No good. 700 is a multiple of 10 .
5 x 560 = 2,800 . . . . . No good. 560 is a multiple of 10 .
7 x 400 = 2,800 . . . . . No good. 400 is a multiple of 10 .
8 x 350 = 2,800 . . . . . No good. 350 is a multiple of 10 .
10 x 280 = 2,800 . . . . . No good. 280 is a multiple of 10 .
14 x 200 = 2,800 . . . . . No good. 200 is a multiple of 10 .
16 x 175 = 2,800 . . . . . Finally ! Neither one is a multiple of 10 .
Answer:
11.2x
Step-by-step explanation:
