Evaluate 3x when x=4

The circumference of the rear wheel of a unusual bicycle is 3 feet more than the circumference of the front wheel. The rear wheel makes 100 fewer rotations than the front wheel in traveling 6000 feet. Find the circumference of the rear wheel

A sphere with a radius of 15 cm has the same volume as a cylinder with a radius of 5 cm. What is the height of the cylinder?

A and B takes 6 days to finish the work. If A take s6 days less than Bto finish the work. How many days B alone can do the work

Emily knits 4 centimeters of scarf each night. How many nights will Emily have to spend knitting in order to knit a total of 16 centimeters of scarf?

What equation is equivalent to 5x-2 (7x+1) = 14

Factor the following. X^2+22x+40

12 r - 18 = 13 r + 18

Grandpa Bill is shrinking by 1/4 of a centimeter each year. How much will he shrink over the next three years? Write an equation using integers and solve the word problem.

what angle measures can the regular octagon be rotated so it maps onto itself? Select each correct answer. 45° 60° 90° 135° 180° 240°

What best decribes the area of polygon