Negative fractions on the number line

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°

What is the perimeter of an equilateral triangle if each side is (x+3)?