How would I evaluate and expression with grouping symbols if it says 7 (13-8)

A tourist looks out from the observation deck of the Space Needle in Seattle. The deck is at a height of 520 ft. She sees her friend on the ground below at an angle of depression of 85.6 degrees.

If the United States government lowers the income taxes on the wealthiest Americans, while decreasing welfare payments to the poorest Americans, the result will likely bea decrease in efficiency anda decrease in equality in the United States.

Determine whether the study described below is a randomized experiment or an observational study. A medical researcher wants to determine whether exercising can lower blood pressure.

7,500 is 24% of what number?

The ancient Greeks were not able to construct

Find the product. x 5 x 4 x 3

Nine twentieths is equal

9:30 25 minutes to drive arrive 10 minutes late, what time did he leave home

A polygon has an interior angle sum of 3060° how many sides must the polygon have?

X = 2/3 y = 1/2 z=4 2/3 work out the value of z+x * y