Brian counted 15 red cars and 20 blue cars in the parking lot. If the number of red cars stays the same, how many more blue cars would need to be added so the ratio of red cars to blue cars is 1 to 2?

Find the slope and intercepts for each line.

Ruth contributes 18% of the total cost of her individual health care. This is $67.50 deduction from each of her biweekly paychecks. What is the total value of her individual coverage for the year?

Suppose that 9% of the general population has a disease and that the test for the disease is accurate 70% of the time. What is the probability of testing positive for the disease? A. 33.6% B. 33.2% C. 32.4% D. 32.8%

How do you subtract 7 and one fourth and 4 and 11 twelves

Start solving #2 with the substitution method 2. a + b + c = 9 a - 8b - C = - 27 2a - b + c = 6

Simplify the expression below. -5 (2x - 1) + 3x

Are all cubes congruent

Find the normal form of the equation of the plane that passes through p = (0, - 4, 5) and is parallel to the plane with general equation 3x - y + 5z = 3.

Five times a number x minus 9 is two thirds of a number y. What is the equation?

The maximum weight an airline allows for a suitcase is 50 pounds. Ella's suitcase weighs 8 pounds empty. If Ella meets the requirements, what could be the weight of the contents of her suitcase?