Find the circumference of a circle with radius 63mm

The area (A) of a circle with a radius of r is given by the formula and its diameter (d) is given by d = 2r. What is the correct 5 step sequence of equations to rewrite the formula for diameter in terms of the area of the circle?

Solve for y. x a = yb

Which graph is the solution to the system y > 2x - 3 and y < 2x + 4?

Roberto's toy car travels at 40 centimeters per second (cm/sec) at high speed and 15 cm/sec at low speed. If the car travels for 15 seconds at high speed and then 30 seconds at low speed, what distance would the car have traveled?

At the snack bar, 7 hot dogs are sold for every 10 hamburgers sold. At this rate, how many hamburgers will be sold if 63 hot dogs are sold?

There are 30 oatmeal cookies and 48 chocolate chip cookies to package in plastic containers for her teacher friends at school.

Hooke's Law says that the force exerted by the spring in a spring scale varies directly with the distance that the spring is stretched.

Adam has dimes and quarters in his pocket. there are 28 coins in all, and they are worth $4.60 altogether. how many quarters does adam have?

A television costs $150 you have two coupons - one for 20% off and one for $35 off. which coupon will save you the most money

Square root n+5 - square root n-10 = 1