3)21 = m + 6 4) 4 = x − 9 4) 4) 4 = x − 9

5) b − 17 = −16 6) −4 = x − 17

Plz help

Explanation:

Switch sides:

m + 6 = 21

Subtract 6 from both sides:

m + 6 - 6 = 21 - 6

Simplify:

Switch sides

x - 9 = 4

Add 9 to each side:

x - 9 + 9 = 4 + 9

Simplify:

Add 17 to each side:

b - 17 + 17 = -16 + 17

Simplify:

Switch sides:

x - 17 = -4

Add 17 to each side:

x - 17 + 17 = -4 + 17

Simplify:

- PNW

b. 13

step-by-step explanation:

as there are 13 students in bowling class therefore the most reasonable answer is b as only 13 students are in the bowling class.

answer: .64

step-by-step explanation

set up the formula for standard deviation for this set of numbers, then simplify