Topic 4 Test

Front

What is the value of the expression 8a + 16c when a = −5 and c = −1?

Back

56

Front

Which expression represents the total price of g pounds of grapes, b pounds of bananas, and p pounds of pears if grapes cost $2.19 per pound, bananas $0.59 per pound, and pears $1.49 per pound?

Back

2.19g + 0.59b + 1.49p

Front

What is the total number of ice cream cones sold if 8x + 16 were sold on Saturday and 7x - 9 were sold on Sunday?

Back

15x + 7

Front

Evaluate the expression 5m - 3n when m = 4 and n = -2.

Back

26

Front

What is the value of the expression −4b + 8c + 12 when b = 2 and c = −3?

Back

-20

Front

What is a variable in mathematics?

Back

A symbol used to represent an unknown value.

Front

What is an expression in mathematics?

Back

A combination of numbers, variables, and operators without an equality sign.

Front

What does it mean to evaluate an expression?

Back

To calculate the value of an expression by substituting variables with numbers.

Front

What is the distributive property?

Back

a(b + c) = ab + ac, meaning you multiply a number by a sum by distributing the multiplication.

Front

What is the difference between an equation and an expression?

Back

An equation has an equality sign, while an expression does not.