Math ACC/7th Grade Review

Front

What are the dimensions of a matrix with 3 rows and 1 column?

Back

3x1

Front

If Chuck's phone bill is $18 and the flat fee is $12, how many minutes did he talk if each minute costs $0.05?

Back

120 minutes

Front

What is the result of multiplying the following matrix: 20, 15, -10; 30, -5, 0?

Back

-20, 15, -10; 30, -5, 0

Front

Solve for x: -2x + 35 = 5(-5 - 7x) - 6

Back

x = -2

Front

If a designer has 3 identical rectangles with a total length of 17 feet and each rectangle is initially 5 feet long, what equation represents the increase in length?

Back

3(x + 5) = 17

Front

What is the definition of a matrix in mathematics?

Back

A matrix is a rectangular array of numbers arranged in rows and columns.

Front

What does it mean to solve an equation?

Back

To find the value of the variable that makes the equation true.

Front

What is the formula for calculating the total cost when there is a flat fee and a variable cost per unit?

Back

Total Cost = Flat Fee + (Cost per Unit × Number of Units)

Front

What is the process of multiplying matrices?

Back

Multiply rows of the first matrix by columns of the second matrix and sum the products.

Front

What is a linear equation?

Back

An equation that makes a straight line when graphed, typically in the form y = mx + b.