Math 7 3rd Nine Weeks Study Guide

Front

What is a ratio?

Back

A comparison of two numbers by division.

Front

How do you calculate 30% off of $120.00?

Back

$36.00 is deducted from the original price.

Front

If a scale model has a scale of 1 in : 4 ft, what is the length of a model for a 120 ft ship?

Back

The model will be 40 inches long.

Front

What are supplementary angles?

Back

Two angles that add up to 180°.

Front

If ∠A is 120°, what is ∠B if they are supplementary?

Back

∠B is 60°.

Front

What is the formula to find the final cost after a discount and tax?

Back

Final Cost = (Original Price - Discount) + Tax.

Front

How do you calculate 33% off of $800?

Back

$264.00 is deducted, making the sale price $536.00.

Front

What is the sales tax on a $536.00 purchase at 6%?

Back

The sales tax is $32.16.

Front

What is the final cost of a TV that costs $800 with a 33% discount and 6% tax?

Back

The final cost is $568.16.

Front

What is a scale in modeling?

Back

A scale is a ratio that compares the size of a model to the actual size.