Answer:

The number is 8 because 
And if you add 4, you get 20
Hence, the number is 8
Answer:
Can you show a picture of the diagram?
Answer:
Step-by-step explanation:
t=(-2.74 + sqrt(2.74^(2)-4*-4.9*(-10))) / -2*-4.9
t=(-2.74 + sqrt(7.5076-4*+49))/9.8
t=(-2.74 + sqrt(7.5076+45))/9.8
t=(-2.74 + sqrt(52.5076))/9.8
t=(-2.74/9.8)+(sqrt(52.5076))/9.8
this is simplest form, next will be rounded answers
t=0.45981763305
F(x)=3x+18
That is the awnser they I got
33 is composite
49 is composite
21 is composite