a contractor is mixing concrete and mixed 3 parts concrete and 9 parts water. How much water is needed for 12 parts concrete?

Dimitri deposited 60% of his paycheck into a savings account be deposited $41.67 what was the total of his check

Cho and Jeff each bought a used bike. Jeff's bike was not on sale and cost the same amount as the original price of Cho's bike. Cho's bike was on sale for $20 less than the original price, and her total cost was half of what Jeff paid.

Dana can rent a van for either $80 with unlimited mileage or $45 plus 40 cents per mile. For what numbers of miles traveled would the unlimited mileage plan save Dani money?

Use the formula to evaluate the series 3-9 + 27 - 81 + ... - as.

A red car and a blue car are traveling at the same speed x. The red car travels for 3 hours. The blue car travels for 3.5 hours and goes 25 miles farther. Write an equation that can be solved to find how fast the cars are going.

Reagan surveyed a number of her classmates about what time they usually go to bed. Of the fifteen classmates she asked, three said 9 p. m. What percent of the students is this?

Do 8:14 and 20:35 form a proportion

You make a large bowl of salad to share with your friends. Your brother eats 1/3 of it before they come over. a. You want to divide the leftover salad evenly among 6 friends. What expression describes the situation? b.

How many times does 7 go into 48

She has 4 pink bracelets. One third of all her bracelets are pink. How many bracelets does she have?