System of equations have one solution

A always

B sometimes

C never

If the average (arithmetic mean) of t and t+2 is x and the average of t and t-2 is y, what is the average of x and y?

Montel spends $0.75 every time he plays his favorite video game. If you have $10, write and resolve an inequality to calculate how many video games you can play

The measurement of the supplement of an angle is 39 degrees more than half the angle find the measurement of the angle

36 cups equal how many ounces

One hundred volunteers who suffer from severe depression are available for a study. Fifty are selected at random and are given a new drug that is thought to be particularly effective in treating severe depression.

Which of the following has a solution set of x? (x + 1 < - 1) ∩ (x + 1 < 1) (x + 1 ≤ 1) ∩ (x + 1 ≥ 1) (x + 1 1)

Jemma keeps a log of the books read during a summer reading program. She creates the line plot. Each dot represents the number of books read in one week. How can you determine how many weeks long the summer reading program was?

A glacier is a giant mass of rocks and ice that flows downhill like a river. a certain glacier moves at a rate of 22 inches a day. Find the distance in feet the glacier moves in a year. (assume 365 days a year)

Evaluate 1/3 divided by 1/3

Is it possible to have an expression that uses brackets without using any parentheses?