Find the surface area of the figure below.

a. 261.34 ft2

b. 95.03 ft2

c. 23.76 ft2

d. 32.67 ft2

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.