Find the acute angle betwen the lines

(a) 2x - y=3, 3x+4y=7

(b) x+2y=7, 5x-y=2

What number would you add to both sides of x2 + 7x = 4 to complete the square?

How do you simplify 55/20

15.763 to the nearest tenth.

Which expression is not equivalent to this expression of 11y-5? is it 88y-40 or 5y-11 or 19y-3 or 22y-10?

Suppose you work in a clothing store. Each week you earn $250 plus a commission equal to 2.5% of your sales. This week your goal is to earn no less than $350. Write and solve an inequality to find the amount of sales you must have to reach your goal.

The Great Pyramid of Giza is a square pyramid located by El Giza, Egypt. The height of the pyramid is currently 455.4 feet. The base is a square with side length of 755.9 feet. Find the volume of the Great Pyramid of Giza. Explain your reasoning.

What is the perimiter, in feet, of a square whose area is 121 square feet

Shelly ran 21/4 miles. Lynne ran 31/8 miles. Who ran farther and by how much?

Brian is ordering tickets online for a concert. the price of each ticket for the concert is t dollars. for online orders there is an additional charge of $11 per ticket and a service charge of $14 for the entire order.

A pack of cinnamon scented pencils sells for $ 4.00 is the sale tax rate if the total cost of the pencils is $4.28 so the sale tax rate is what percent