7.1 Writing Expressions

A wedding photographer and their assistant work together to photograph weddings. The rates are shown in the advertisement.

Which TWO ways can you write an expression that would represent the total cost for the wedding after h, hours.

• (40h + 15h) + 50

• 50h + 55

• (40h-15h) + 50

• 55h + 50

Benita buys 2 shirts for the same price. The sales tax rate is 6.5%. Write an expression to represent the total cost for the shirts (s) in TWO different ways.

• 2s(0.65)

• 2s (1.065)

• (s+ s) 1.065

• (s + s) + 0.65

A hobby store is having a promotion on picture frames: buy 3 get the 4th frame at 75% off.

Write an expression to represent the total cost for 4 frames(f) in TWO different ways.

• f + f + f + 0.25f

• 3.25f

• f + f + f + 0.75f

• 3.75f

Are the following equivalent:

k + 0.10k and 1.1k

• yes

• no

Which expressions are equivalent to: 0.65b (choose all that apply)

• 0.35b - 20b

• 0.25b + 0.40b

• 1.0b - 0.35b

• 0.85b + 0.2b

Chris wants to buy shampoo that is on sale as shown in the picture.

Which expression could NOT be used to find his total after buying 3 bottles that cost x amount?

• 2.3x

• 2.7x

• x + x + 0.7

• 2x + 0.7x

Shawn and his friends are going to the State Fair. It costs $12 to park their car. Tickets to get in are $10 per person. If p represents the number of people, which expression represents how much money Shawn and his friends will spend?

• 12p + 10p

• 12p - 10p

• 12p + 10

• 12 + 10p

Tags

CCSS.HSA-SSE.A.1A

Dave has $800 in his savings account. He adds $30 to his savings account each week.

How do you calculate how much money he has after 5 weeks?

• 800 + 30

• 800 + 30 + 5

Answer explanation

You could add $30 five times.

800+30+30+30+30+30

The quicker way to do it is to MULTIPLY $30 by 5. Then, add that to $800.

Tags

CCSS.HSF.BF.A.2

Cody has $450 in his savings account. He adds $20 to his savings account each week. Which expression represents the amount of money Cody has in his savings account after x weeks

• 450x + 20

• 450 + 20x

• 470 + x

• 470x

Tags

CCSS.6.EE.B.6

A plumber charges a customer a one-time service fee of $79, $62 per hour for labor, and a surcharge of $15 per hour due to the call being an emergency.

Write an expression to represent the total charges for the plumber after x number of hours/