Y=-3x+2x, 3x+y=1 solve using substitution

A passenger jet can fly 804 miles in 2 hours with tailwind but only 776 miles in 2 hours into a headwind. Find the speed of the jet in still air and the speed of the wind

20. Seventy is 60% of what number?

A chemistry teacher needs to mix a 30% salt solution with a 70% salt solution to make 20 qt of a 40% salt solution. How many quarts of each solution should the teacher mix to get the desired result?

How to solve for x was crying out and she

A swimming pool holds 480,000 liters of water. The pool has two drainage pipes. When the pool is completely full, the first pipe alone can empty it in 160 minutes, and the second pipe alone can empty it in 240 minutes.

The product of my number and twice my number is 128. what is half my number? Explain how to solve the problem.

What is the rule that describes this pattern of numbers? 2, 3, 5, 7, 11, 13, 17, 19, 23, 29

Jim spent $13 to park for 5 hours. The parking garage charges a base rate of $4 for the first two 2 hours, and then an hourly rate for each additional hour, h. The equation 3h + 4 = 13 models Jim's parking cost.

four fifths of senior class went to prom. if 324 seniors went to prom, how many are there in the senior class

Use the gcf and distrubutive property to express the sum as a product for 18+24