3rd Truths and Equations

Translate the sentence into an equation.
Seven subtracted from n is 18 

• n + 7 = 18
• 7 - n = 18
• n - 7 = 18
• n + 7 = 18n

Twice a number plus half 

• 2x + 1/2
• 2 + x/2 

z - 4

• 4 inches ahead
• 4 less than z
• 4 times as many
• one-fourth the size

z - 7

• seven times as many
• seven inches ahead
• seven inches behind

Beth is 6 years younger than twice her brother's age.  How old is Beth?

• 6 - 2b
• 2b - 6
• 1/2b + 6
• b + 6

5.  After dropping 5ºF, the temperature was 37ºF.  Write a subtraction equation to show what the starting temperature was.

• d - 37 = 5
• d + 5 = 37
• d - 5 = 37
• d + 37 = 5

What is the difference between an expression and equation?

• Expressions have an equal sign and equations do not have an equal sign
• Expressions do not have an equal sign and equations do have an equal sign
• There is not a difference
• Expressions do not have variables and equations have variables

How would you translate
x - 5 = 12 into words?

• x - 5 = 12
• The product of x and 5 is twelve
• x less than 5 is 12
• Five less than x is 12.

A number split equally by seven

• 7 ÷ n 
• 7n
• n - 7 
• n ÷ 7

Translate this phrase into an algebraic expression.
24 more than Vivian's test score. 
Use d to represent Vivian's test score.

• 24x
• x - 24
• x + 24
• x/24