14. Ten years ago.
A 10-X
B. 10+x
C. X-10
D. x+10y

15. A number decreased by seven.
A. 74%
B. 7-X
C. x-7
D. 10X-3x

16 8 subtracted from b.
A. 8-b
B. b+8
C. 10b-4b
D. 6-8

17. One-fourth of m.
A. 4m
B. 1/4m
C. m/4
D. 4m/4

18. r inceased by six.
A. r⁶
В. 3r + 3r
C. r + 6
D. 6ʳ

19. The ratio of 8 and d.
A. 8/d
B. d/8
C. 8d: d
D. 8d/4

20 The square of thrice a number y.
B. 3x²
A. 3²x
C. (3x)²
D. 3+x²​