Answer:
f=54
Step-by-step explanation:
ma is m times a 3x18= 54
F = -54
You plug in the numbers that you can
so.. F = ma -ma= m * a
M= 3
a = -18
F = 3* (-18)
because there is one (-) number and you are multiplying your answer is going to be (-)
F= -54
