23,710 23,751,23,715

On a recent trip, mary drove 50 miles. what was the average speed at which she drove the 50 miles? (1) she drove 30 miles at an average speed of 60 miles per hour and then drove the remaining 20 miles at an average speed of 50 miles per hour.

X-2y=4 x-2y=5 how many solutions does these equations have

What is the solution to the linear equation? d - 10 - 2d + 7 = 8 + d - 10 - 3d. a. d = - 5 b. d = - 1 c. d = 1 d. d = 5

Josiah and his friends are going to the movies. Each ticket costs $10, and popcorn is $5 a bag. There is a $3 service fee for the entire purchase. He has $75. If he buys 4 tickets, what is the maximum number of bags of popcorn he can buy

Factor the Polynomial. 3a^2+9

What is 100/2,670 simplified?

2. Find the product (11x2 + 7x - 3) (-5x + 1). -55x3 - 24x2 + 22x - 3

What is 5 (x+1) = 68-2x-2x

What is 6 x blank = 36

There was a sample of 600 milligrams of a radioactive substance to start a study. Since then, the sample has decayed by 7.9% each year. Let t be the number of years since the start of the study. Let y be the mass of the sample in milligrams.