45 plus what equals 90

Two trains left the station at the same time. One headed north at 55 mph and the other headed south at 70 mph. How many miles apart were the trains at the end of 3 hours?

Use factoring to solve the following quadratic: 6x2 + 23x - 18 = 0

two dice are rolled, find the probability that an even number appears on the first and the number 5 appears on the second die

Rosario and Enrqiue are in the same mathematics class. On the first five tests, Rosario received scores of 78, 77, 64, 86, and 70. Enrique received scores of 90, 61, 79, 73, and 87.

the state where you live has a 6% sales tax. If you purchase a car for 9800 what will you pay including tax this is two step problem

You roll a standard number cube once. Find p (number lass than 7).

Convert 55 f to degrees Celsius

Determine which consecutive integers do not have a real zero of f (x) = x^3+5x^2 - x - 6 between them. (-6,-5) (-2,-1) (-5,-4) (1,2)

8 ⅔ - ⅓ + (⅔) ² + 56 : 7=

The male elephant weighs 8,000 pounds wich is the is th same as 4 tons the female weighs 7,000 pounds how many tons does the female weighs