Linear Equations Real World

For a field trip 4 students rode in cars and the rest filled nine buses. How many students were in each bus if 472 students were on the trip?

• 4x=472

• 9x=472

• 4+9x=472

• 4+x=472

After paying $5.12 for a salad, Kamauri has $27.10. How much money did he have before buying the salad?

• n + $5.12 = $27.10

• n - $5.12 = $27.10

• n - $5.12 = -$27.10

• $5.12 - n = $27.10

What is the first step in solving this equation:
5x + 7 = 12

• Divide by 5

• Subtract 5

• Multiply by 7

• Subtract 7

• (0,445)

• (0.50, 435)

• (233, 21)

• (118, 209)

• (172, 101)

Sierra has a bucket that originally contained 340 oz of water and is filling at a rate of 5 fl oz per minute.  Brian has a bucket that originally contained 650 oz of water that is being drained at a rate of 8 fl oz per minute.  What is x, the number of minutes that need to pass for the two buckets to contain the same amount of water?

​ (a)   X ​ (b)   ​ (c)   ​ (d)   X ​ (e)  

< or > or =

• +340

• >

• 5

• +650

• <

• -340

• 8

• -8

• -650

• =

How would you put this in y=?

• y1=4.6+1.2x

  y2=54.6-0.8x

• y1=4.6+1.2x

  y2=54.6+0.8x

• y1=5.8x

  y2=55.4x

• y1=5.8x

  y2=53.8x

• 2

• 3

• 6

A delivery person uses a service elevator to bring boxes of books up to an office. The delivery person weighs 160 lbs and each box of books weighs 50 lbs. The maximum capacity of the elevator is 1000 lbs. How many boxes of books can the delivery person bring up at one time?

• 50x + 160 = 1000

• 50 + 160x = 1000

• 50x - 160 = 1000

• 50 - 160x = 1000

The cost, c, to park in a parking garage can be represented using the equation c = 5 + 0.5h, where h is the number of hours the car is in the parking garage. Which of these statements is TRUE?

• It costs $0.50 to park in the garage for 1 hour.

• It costs $5 to park in the garage for 1 hour.

• It costs $5 per hour to park in the garage.

• It costs $6 to park in the garage for 2 hours.

Which situation can be represented by the equation y = 8x + 42.5

• Emily plans to take art classes to learn how to paint. She spends $42.50 on supplies at Hobby Lobby and $8.00 on supplies at Michaels. What is y, the total amount spent after buying x supplies?

• Ari has $42.50 in her bank account. She spends $8.00 on Christmas gifts for each of her AVID mentees. How much total money, y, does Ari have in her account after buying x, gifts?

• Christine buys some movie tickets for $8.00 each. Then she spends $42.50 on snacks at the concession stand. What is y, the total amount spent after buying, x, tickets?

• Stephen is a baker and sells birthday cakes. He spends $42.50 on ingredients, then charges $8.00 per cake. What is y, the total amount earned after selling x, cakes?