Linear equations (two variables)

Problem #14 b, you

RAFFLE TICKETS: You and your friend are selling raffle tickets for a new laptop. You sell 14 more tickets than your friend sells. Together, you and your friend sell 58 tickets.

b. How many tickets do each of you sell?

you sell ___ tickets

Tags

CCSS.8.EE.C.8C

You work at a concession stand at a fair, where you sell only 90 hats and 200 T-shirts that day, making a total revenue of $4,500. If T-shirts costs eight dollars more than hats, what would be the total price of FOUR T-SHIRTS? You do not need the dollar sign.

How many science problems are there? Write only a number as your answer. Remember, 

x = science problems

y = math probems

 $x+y=42$  
 $y=x+10$  

A restaurant sells pizza for the prices in the data table. Calculate the linear regression equation of the data in the form y = a + bx.

• y = 12 + 1.5x

• y = 1.5 + 12x

• y = -8 + 0.67x

• y = 0.67 - 8x

Tags

CCSS.8.EE.C.8C

The length of Sally's rectangular garden is 4 feet longer than 3 times the width. The perimeter of her garden is 72 feet. Which system of equations can be used to find the length, l, and width, w, of her garden?

• $l=3w+4$

  $2l+2w=72$
  

• $l=3w-4$
  $2l+2w=72$

• $l=4w+3$
  $2l+2w=72$
  

• $l=4w-3$
  $2l+2w=72$

Tags

CCSS.8.EE.C.8C

Jack and Matt are selling fruit for a school fundraiser. Customers can buy small boxes of oranges and large boxes of oranges. Jack sold 7 small boxes of oranges and 8 large boxes of oranges for a total of $222. Matt sold 7 small boxes of oranges and 2 large boxes of oranges for a total of $108. What is the cost each of one small box of oranges and one large box of oranges?

• small box of oranges: $10, large box of oranges: $19

• small box of oranges: $16, large box of oranges: $17

• small box of oranges: $8, large box of oranges: $20

• small box of oranges: $6, large box of oranges: $16

Tags

CCSS.8.EE.C.8C

An airline offers 21 daily flights between two cities. Of these flights, the number of nonstop flights, x, is three more than half the number of flights with one stop, y. What is the number of daily nonstop flights between these two cities.

Mathematical Equivalence

ON

Tags

AI.9.2.I

AI.9.5.C

On Monday Joe bought 10 cups of coffee and 5 doughnuts for his office at the cost of $16.50.   On Tuesday he bought 5 cups of coffee and 10 doughnuts for a total of $14.25.  Which equations could be used to determine the cost of the coffee?  Let c represent the number of cups of coffee, and let d represent the number of doughnuts.

• 10c + 5d = 14.25 5c + 10d = 16.50

• 10c + 5d = 16.50 5c + 10d = 14.25

• c + d = 10 5c + 10d = 16.50

• c + d = 5 5c + 10d = 16.50

Tags

CCSS.8.EE.C.8C

Annette has math and science tests this week. She sets aside 275 minutes for study time. She determines she needs to study for science 10 minutes less than twice the amount of time she studies for her math test. Which student correctly wrote a system of equations to find the number of minutes Annette needs to study for her math test, x, and her science test, y.

• SASHA

• MARCO

• DEONDRE

A sports store sells basketballs for $20 each and footballs for $15 each. If the sports store sold a total of 10 basketballs and footballs for a total of $185, how many basketballs did they sell?

• 5

• 7

• 9

• 3