If x = 4cm, find the area of this triangle. (pic)

a. 896cm^2
b. 16cm^2
c. 240cm^2
d 448cm^2

Which of the following is an equation of a line parallel to the equation y=4x+1?

Tom drove 206 miles in 3.9 hours. estimate his average speed.

Which of the following functions corresponds to the above sinusoid? a. 10 cos πx - 5 b. -5 sin x - 5 c. -10 cos πx/2 - 0.5 d. 10 sin πx - 5