Writing Equations

Which situation can be represented by the equation y=12x ?

• Victoria went to school for x years.
  This is 12 times y, the number of years her brother went to school.

• Victoria spent x dollars to buy a gift for her brother.
  She gave the cashier y dollars and received $12 in change

• Victoria has y dollars.
  This amount is 12 times x, the amount of money in dollars Victoria’s brother has.

• Victoria is y years old.
  Her age is 12 years greater than x, her brother’s age in years

Tags

CCSS.6.EE.C.9

Which statement describes the relationship between x and y in these two equations?

y=2x y=x+2

• In y=2xy the value of yyy is 2 more than the value of x, and in y=x+2 the value of y is twice the value of x.

• In y=2x and in y=x+2, the value of y is 2 more than the value of x.

• In y=2x and in y=x+2, the value of y is twice the value of x

• In y=2x the value of y is twice the value of x, and in y=x+2 the value of y is 2 more than the value of x.

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

The cost of downloading one song from a website is $0.99. Which equation can be used to find t, the cost in dollars of downloading n songs?

• t = 0.99 + n

• t = 0.99n

• n = 0.99t

• n = 0.99 + t

Tags

CCSS.6.EE.C.9

• A

• B

• C

• D

Tags

CCSS.6.EE.C.9

Adam charges $40 per hour for his cleaning service. Which equation could be used to determine the total amount of dollars (d) Adam will charge for (h) amount of hours?

• d = 40h

• d = 40 - h

• d = 40 + h

Tags

CCSS.6.EE.C.9

Sarah earns $15 for every hour she works. Which equation can be used to find e, the total earnings in dollars for h hours?

• e = 15h

• e = h + 15

• h = 15e

• e = 15 - h

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

The Roaming Cell Phone Company charges $15.00 per month plus $0.20 per minute of airtime usage.  If Juanita uses x minutes of airtime, what is an equation that can be used to determine her monthly cell phone bill (C)?

• C = 15 + 0.20x
• C =15 (0.20x)
• C = 15 + x + 0.20
• C = 0.20 + 15x

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Gourmet chocolate costs $5.25 per pound. Which equation best represents y, the total cost of x pounds of chocolate?

• x = 5.25y

• y = 5.25 + x

• y = 5.25x

• x = 5.25 +y

Tags

CCSS.6.EE.C.9

A pizzeria charges $12 per pizza plus an additional $3 for delivery. Which equation represents the cost of having any number of pizzas delivered?

• c = 12p + 3

• c = 12p

• c = 3p

• c = 12 + 3p

Tags

CCSS.HSF-BF.A.1A

What is the correct equation for the graph?

• y = x + 5

• x = y

• y = 5x

• x = 5y

Tags

CCSS.8.EE.B.5