Simplify 7^1 x 7^-3 divided by 7^3

Evaluate exactly in radians: arctan (1/sqrt (3)). Show solution w / explanation.

Andrew can paint the neighbors house 3 times as fast as Bailey. The year Andrew and Bailey worked together, it took them 10 days. How long would it take each to paint the house?

A musical instrument company reduced the time it takes for a worker to build a guitar. Before it the reduction it took 5 hours. Now in 7 hours they can build 3 guitars.

Charmaine has 6 CDs that she is going to give away. She lets her best friend choose 3 of the 6 CDs. How many different groups of 3 CDs are possible?

2.049 in expanded form

What is a 5% improvement from 4.99

Solve the following equations: 2/3 (6x+9) = - 2 (1/2x+4) -3 (2y-1) = 4 (1/2y+3/4)

What are the solutions to the system of equations?

Name a real life a example of using negative numbers

Kim spent 70% of her salary on expenses and saved $1200 what is her salary