What does 2 in front of a square root mean?

A metalworker has a metal alloy that is 20 % copper and another alloy that is 60 % copper. How many kilograms of each alloy should the metalworker combine to create 90 kg of a 52 % copper alloy?

Solve the following equation 2 (2x + 1) - 3 (x - 1) = 8

What's the slope to (-5,5) (5,-4)

A movie theater sells all 250 tickets on a particular night. students can get discounted tickets half off the normal $20 price.

What fraction is equal to 3 1/9?

What is the best approach to prevent the spread of a bacterial infection? Wash hands with soap for at least 20 seconds. Wash hands with water only. Handle food without washing your hands. Wash hands with soap for five seconds.

Maria must choose a number between 61 and 107 that is a multiple of 5, 6, and 10. Write all the numbers that she could choose. If there is more than one number, separate them with commas.

What are the x - and y - intercepts for the line y+8=4 (x-5) y+8=4 (x-5) ? Enter your answers as a whole number in the boxes. The x-intercept is . The y-intercept is

Which of the following analyses involves making hypothetical changes to the data associated with a problem and observing how these changes influence the results? Select one: a. predictive analysis b. linear regression analysis c. what-if analysis d.

Lucy has to run two errands. She starts from home and travels 3 miles south to the post office. From the post office, she travels 4 miles east to the gas station. Then, from the gas station, she travels 5 miles to return home.