Select all the numbers that are exactly divisible by 9 b. 56
c. 72
d. 93
e. 146
f. 198

c, f

Step-by-step explanation:

c. 72/9=8

f. 198/9=22

C.72

Step-by-step explanation:

9*6=54 so b No

9*8=72 so c Yes

9*10= 90 so d No

9*16=144 so e NO

9*22=198 so f Yes its divisible but not exactly because exactly means under 100

21

step-by-step explanation:

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a