Inequalities, Expressions, and Equations

the difference if 3 times a number and 7

• 3 - 7n
• 3n - 7
• 3n + 7 
• 3 / 7n

a number more than 12

• n + 12
• 12n 
• 12 + n 
• 12 - n 

Five times Mike's age, increased by nine

• 5(x+9)
• 9(5+x)
• 9x+5
• 5x+9

"Subtracted from" and "less than" are terms that mean you need to "turn" or "flip"  the terms around.

• True
• False

Translate the sentence into an equation:
Four more than six times a number is 18.

• 10x = 18
• 4x + 6 = 18
• 4 + 6x = 18
• not enough info

Two more than 4 times a number is -18.

• 4x + 2 = -18
• 2x + 4 = -18
• 18 = 4x +2

The quotient of five and number y is at least eighteen.

Seven times the sum of a number x and nine is twelve.

• 7(x+9)=12

• 7x+9=12

• 7x+9<12

• 7(x+9)>12

The product of five and number y is at least eighteen.

Select the expression.

• 3+5=8

• 3+5

• 3+5>7

• 3+5<10