Which customary unit of measure would you use to estimate the perimeter of your classroom doorway?

feet

inches

miles

centimeters

Six less than double a number x

Jackie is selling smoothies at a school fair. She starts the day with $15 in her cash box to provide change to her customers. If each smoothie costs $3.75, which graph represents the balance of the cash box, y, after Jackie sells x smoothies?

I found a rock that contains 1g of radioactive Radium (half-life = 1600 years). I measure that 15g is no longer radioactive. How old is my rock?

How do I find the missing side or hypotenuse in a 45 45 90 triangle

Express 8 as a product of prime factors in index form

a triangle has an area of 38.4cm. the height of the triangle is 12.8cm. what is the length of the base of the triangle

Terry had $6.20. He then paid for his lunch with 3 quarters, 6 dimes and 9 nickels. How much money does he have now?

Find the unit rate for 50 miles on 2 1/2 gallons

What function has real zeros at x = 3 and x = 7?

A map has a scale of 6 inches which is equal to 26 miles in real life. If Clayton and Clinton are 52 miles apart, then they are how far apart on the map?