How many gallons of a 80% antifreeze solution must be mixed with 60 gallons of 30% antifreeze to get a mixture that is 70% antifreeze?

3x+6y=12 x + 5y=10 x = 10 - 5y 3 (10 - 5y) + 6y=12 30-15y+6y=12 30-9y = 12 -9y=-18 y=2 Joey has to solve the system of equations using substitution. He had completed the work shown. What should be his next step

Carlos has 38 apples. he puts 8 apples into each bag. if he fills as many bags as possible. how many apples are left?

Write an equation with the solution x = 20

Is 7/15 in simplest form?

Explain how to use equivalent ratios to find 125% of 200.

For which equation would x = 12 be a solution? x + 4 = 12 48 : x = 12 12 - x = 4 12x = 144

The rectangle below has an area of x^2-9 square meters and a width of x-3 meters. What expression represents the length of the rectangle?

Mr. Haney has 11 coins in dimes and quarters. The value of his coins is $2.15. how many dimes does he have?

Different varieties of field daisies have numbers of petals that follow a fibonacci sequence. Three varieties have 13,21, and 347 petals. How many petals do the next two varieties of field daisy have? a. 42, 55 b. 47,60 c. 42,50 d. 55,89

A certain hybrid car can travel 1 4/11 times as far as a similar non hybrid car can, each on one gallon of gasoline. If the non hybrid car can travel 33 miles per gallon of gasoline how far can the hybrid travel on 4/5 gallon of gasoline?