Question

1. X=7 and y=3

A. X+Y=

B. X+X+Y=

C. 2X+5Y=

D. 8(X+Y)=

E. 15(2X+Y+Y)=

Answer 1

A. 10

B. 17

C. 29

D. 80

E. 300

Explanation:

A.

x + y

7 + 3

10

B.

x + x + y

7 + 7 + 3

14 + 3

17

C.

2x + 5y

2(7) + 5(3)

14 + 15

29

D.

8(x + y)
8(7 + 3)

8(10)

80

E.

15(2x + y + y)

15(2(7) + 3 + 3)

15(14 + 3 + 3)

15(17 + 3)

15(20)

300