What is the value of x and y if 21x+7y=42 and - 5x+5y=10 are equal

Approximate 12lb 13oz to the nearest stone

What is the product of x2+10x+28

The cylinder shown has a lateral surface area of about 400 square inches. Which answer is closest to the measure of the cylinder's radius? Use 3.14 to approximate pi

Calculate s_75 for the arithmetic sequence defined by {a_n}={67-2n}

17.2=h+4 what does h equal

Trignometric ratios

Simplify | 4-9 | A) 13 B) 5 C) - 5 D) - 13

Plastic cups come in packages of twenty-four and straws come in packages of twenty. What's the smallest number of each that could be bought so that you had the same amount of cups and straws?

What is 12+2-8=6-12 = - 6 + 18

A ramp leading into a building makes a 15 degree angle with the ground. The end of the ramp is 10 feet from the base of the building. Approximately how long is the ramp? Round to the nearest tenth.