Unit 4 Check 2

Front

Which is NOT a solution to 4y > 20?

Back

5

Front

Solve for x: 3.8x = 27.74

Back

x = 7.3

Front

If Beth biked twice as long as Heather and Beth biked 9 hours, which equation shows how long Heather biked?

Back

2b = 9; b = 4.5

Front

You go to the bookstore with $48. Which inequality shows the maximum number of books you can buy if each book costs $4?

Back

4x ≤ 48

Front

Zach had $25. He bought some candy for $2.75 and a watch. He got $4.00 in change. Which equation shows how to find out how much the watch cost?

Back

w + 2.75 + 4.00 = 25; w = 18.25

Front

What is an inequality?

Back

An inequality is a mathematical statement that compares two expressions, showing that one is greater than, less than, or not equal to the other.

Front

What does it mean to solve an equation?

Back

To solve an equation means to find the value of the variable that makes the equation true.

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents an unknown value in an equation or expression.

Front

What is the purpose of using inequalities?

Back

Inequalities are used to show the range of possible values that satisfy a condition.

Front

How do you isolate a variable in an equation?

Back

To isolate a variable, you perform operations to get the variable on one side of the equation and the constants on the other.