Which expression should be used to estimate the answer to this story problem?

Marcus is reading a long novel. For 5 nights, he read 83 pages each night. How many pages did Marcus read?

A. 90 * 5

B. 90 : 5

C. 80 : 5

D. 80 * 5

Which answer describes the simpler problems that could be used to solve this story problem? Wendy's sister had $12 and Wendy had twice as much money as her sister. Wendy spent $4 at the market and $3 at the newspaper store.

Convert the following equation to standard form: f (x) = 4 (2x-3) (5x+7)

Of the 30 students in Mrs. Smith's math class, 13 are athletes and 9 are in band. Three of the athletes are also in band.

4 to the fourth negative power multiplied by four to the fifth power

Can someone explain integers for me? I dont really get it like why do 2 negatives equal a postitive?

What is a rational number that is between 9.5 and 9.7? What is an irrational number between 9.5 and 9.7?

There are approximately 2.5 million births in a country each year. Find the birth rate in units of births per minute

Find the simple interest at the 3% annual rate for 10 years

A triangle has sides measuring 5 inches and 8 inches. If x represents the length in inches of the third side, which inequality gives the range of possible values for x?

If pq = 23 and uv = 1/23, find the value of u x q x v x p. Explain which properties you used.