I dont believe you typed the whole equation, if you can clarify I might be able to help! but 3×27 = 81 if that's what you were looking for.
Answer:
25
Step-by-step explanation:
2x+2+5x+3=180
7x=175
x=24
Answer:
There is a significant linear correlation between the two variables.
Step-by-step explanation:
Given that part time weekly earnings are
x y
10 93
15 171
20 204
20 156
35 261
Correlation 0.9199
H0: r=correlatin =0
Ha: r ≠0
(two tailed test)
r difference = 0.9199
t = 
p value < 0.0001
Since p <0.05 we reject null hypothesis
There is a significant linear correlation between the two variables.
2.5+105sin40 t -16 t^2 = 0
t = (-105sin(40) + sqrt(105^2sin^2(40)-4(-16)(2.5))) /2(2.5)
t = .235 seconds if i entered those right