Solve the system equation below

3x + y = - 7

-2x + 4y = 0

Aldo will rent a car for the weekend. He can choose one of two plans. The first plan has no initial fee and costs $0.70 per mile driven. The second plan has an initial fee of $65 and costs an additional $0.60 per mile driven.

Find three real numbers whose sum is 22 and whose sum of squares is as small as possible

Suppose 80% of people can swim. Suppose 70% of people can whistle. Suppose 55% of people can do both. What percentage of people can swim or whistle?

Sold 12 rolls of wrapping paper and 21 ribbon for $143.25. Then 16 rolls of wrapping paper and 25 ribbon for $181.25. How much is a toll of wrapping paper and how much is ribbon

What accounted for the high mortality rate if the French army I russia?

An airplane descends 1.5 miles to an elevation of 5.25 miles. Write and solve an equation to find the elevation of the plane before its descent.

What is the square root of - 148

Jamal and tia started riding to the mall with their bicycles. The mall is 3.5 km from Jamal's house. They stopped for a drink at a park after 2.25 Km. How much farther do they have to ride to reach the mall.

Luke made a model of a solid figure with one circular base and one curved surface with solid figure did he make

A cone is inscribed in a regular square pyramid. If the pyramid has a base edge of 6" and a slant height of 9", find the volume of the cone.