A metalworker has a metal alloy that is 20 % copper and another alloy that is 75 % copper. How many kilograms of each alloy should the metalworker combine to create 80 kg of a 53 % copper alloy?

One competitor in a 100-mile bicycle race took a total of 5 hours to complete the course. his average speed in the morning was 23 miles per hour. his average speed in the afternoon was 13 miles per hour.

How can you approximate the square root of 30?

What is $210 reduced by 40%

There are 20 student desks in Ms. Johnson's. Each desk measures 25.1 inches long. If you were to line up all the desks end-to-end, how long would all the desks be?

The height and radius of a cylinder are 23cm and 5cm what the volume?

If sales tax is 5%, what is the sales tax on an item costing $65?

You pick a card at random. 2 3 4 5 What is P (5) ? 1% 25% 41% 11%

How do you turn 3.0035 into a fraction

Jeff goes to the fair and spends a fourth of his money on the ticket and half of his money on food. If he spent a total of $24, how much did he arrive with

Jenny wants to multiply out the brackets in the expression 3 (2a+1) she writes 3 (2a+1) = 6a+1 show why jenny is wrong