Which is an equation?
A.) 17 + x
B.) 45 ÷ x
C.)20x = 200
D.) x - 90

What expression is equivalent to 1/2(2+3x-6)

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4