How do you do this equation - 12 - a = 4a - 7

An office building is 20 feet taller than twice the height of a bank building. If the office building is 320 feet tall, how tall is the bank building?

What is negative 9 over 5 divided by 2?

Calculate the mean: 8, 11, 19, 17, 15

What is the largest perfect square root of 300?

What is the difference between these fractions? +3/4 - (+7/8)

How do you estimate 586-321

The map shows the intersection of three roads. Malcom Way intersects Sydney Street at an angle of 162°. Park Road intersects Sydney Street at an angle of 87°. Find the angle at which Malcom Way intersects Park Road.

Customers at Fair Weather Farmer's Market love to sample Ava's homemade strawberry jam. A jar of jam contains 12 ounces, and the sample size is 1 2 of an ounce. How many people can sample from one jar?

In 1/8 days, a construction crew built 1/4 miles of a road. What is the unit rate in miles per day.

Part A: What is the value of 2x if 4x + 6 = 2x - 12? Part B: What is the value of x - 3 if 24 = 6x - 18?