How many solutions does this system have?

x-y=-4 and 3x+y=8

2 + 3 = 1/2 (6 + 4c)

At the party 4⁄5 of a watermelon was eaten and 3⁄4 of a second watermelon was eaten. What is the total amount of watermelon eaten?

Ryder shot a model rocket over an area that consists of two grassy areas, shown in green, and an area with no grass, shown in white. What is the probability that his model rocket has landed in a grassy area?

Mary spent a total of $322.73 for a party. She spent $200.21 on food, plus an additional $30.63 for each hour of the party. How long was the party? A. 4 hours B. 5 hours C. 6 hours D. 3 hours

9cm is equal to what in mm

Why is it important to include both a number and a unit when describing a measure?

The integers between 2 and 6

What integer is 25 less than - 25?

Two cars got an oil change at the same auto shop. The shop charges customers for each quart of oil plus a flat fee for labor. The oil change for one car required 5 quarts of oil and cost $20.30.

Vivi is a drummer for a band. She burns 756 calories while drumming for 3 hours. She burns the same number of calories each hour. How many calories does Vivi burn per hour?