Unit 2 Lesson 2 HW check

Large cheese pizzas cost $5 each and large one-topping pizzas cost $6 each.

Write an equation that represents the total cost, T , of c large cheese pizzas and d large one-topping pizzas.

• $5c+6d=T$

• $c+d=T$

• $5+6\ =T$

• $11T\ =\ c+d$

Tags

CCSS.HSA.CED.A.3

Jada plans to serve milk and healthy cookies for a book club meeting. She is preparing 12 ounces of milk and 4 cookies per person. Including herself, there are 15 people in the club. A package of cookies contains 24 cookies and costs $4.50.
A 1-gallon jug of milk contains 128 ounces and costs $3.
Let n represent number of people in the club, m represent the ounces of milk, c represent the number of cookies, and b represent Jada's budget in dollars.
Select 3 equations that could represent the quantities and constraints in this situation.

•  $m=12\cdot15$  

•  $3m+4.5c=b$  

•  $4n=c$  

•  $4\cdot4.50=c$  

•  $2\cdot3+3\cdot4.50=b$  

Tags

CCSS.HSA.CED.A.3

A student on the track team runs 45 minutes each day as a part of her training. She begins her workout by running at a constant rate of 8 miles per hour for a minutes, then slows to a constant rate of 7.5 miles per hour for b minutes.

Which equation describes the relationship between the distance she runs in miles, D, and her running speed, in miles per hour?

• $a+b=45$

• $8a+7.5b=D$

• $8\left(\frac{a}{60}\right)+7.5\left(\frac{b}{60}\right)=D$

• $8\left(45-a\right)+7.5b=D$

Tags

CCSS.6.EE.C.9

Elena bikes 20 minutes each day for exercise.

Write an equation to describe the relationship between her distance in miles, , and her biking speed, in miles per hour, when she bikes:

at a constant speed of 13 miles per hour for the entire 20 minutes

• $D=13\cdot\frac{1}{3}$

• $D=13\cdot20$

• $D=13-20$

• $13+D=20$

Tags

CCSS.6.EE.B.7

Elena bikes 20 minutes each day for exercise.Write an equation to describe the relationship between her distance in miles, , and her biking speed, in miles per hour, when she bikes at a constant speed of 15 miles per hour for the first 5 minutes, then at 12 miles per hour for the last 15 minutes

•  $D=15\cdot\frac{1}{12}+12\cdot\frac{1}{4}$ 

•  $D=\frac{15+12}{60}$ 

•  $D=15+12$ 

•  $12\cdot\frac{1}{15}+4\cdot12=D$ 

Tags

CCSS.6.EE.A.2

CCSS.6.EE.B.6

CCSS.6.EE.C.9

Elena bikes 20 minutes each day for exercise.Write an equation to describe the relationship between her distance in miles, , and her biking speed, in miles per hour, when she bikes at a constant speed of A miles per hour for the first 5 minutes, then at B miles per hour for the last 15 minutes

•  $D=\frac{1}{12}A+\frac{1}{4}B$ 

•  $D=\frac{A+B}{60}$ 

•  $D=A+B$ 

Tags

CCSS.6.EE.C.9

The dot plot displays the number of marshmallows added to hot cocoa by several kids. What is the MAD of the data represented in the dot plot?

• 0.6 marshmallows

• 3 marshmallows

• 4 marshmallows

• 5 marshmallows

Tags

CCSS.6.SP.B.5C

After studying the data, the reasearcher realized that the value 100 was meant to be recorded as 15. What happens to the mean and standard deviation of the data set when the 100 is changed to a 15?

• Mean and standard deviation decrease

• Mean and standard deviation increase

• Mean increases and standard deviation decreases

• Mean decreases and standard deviation increases

Tags

CCSS.6.SP.A.3

CCSS.6.SP.B.5

After studying the data, the reasearcher realized that the value 100 was meant to be recorded as 15. What happens to the mean and standard deviation of the data set when the 100 is changed to a 15? For the original data set, with the 100, would the median or the mean be a better choice of measure for the center?

• The median would be a better choice, because the value of 100 skews the median but not the mean.

• The mean would be a better choice, because 100 is an outlier.

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

A coach for a little league baseball team is ordering trophies for the team. Players on the team are allowed to choose between 2 types of trophies. The gold baseball trophies cost $5.99 each and the uniform baseball trophies cost $6.49 each. The team orders g gold baseball trophies and u uniform baseball trophies.
What expression could represent the total cost of all of the trophies?

•  $5.99g+6.49u$  

•  $5.99u+6.49g$  

•  $\left(5.99+6.49\right)\cdot g$  

•  $\frac{5.99}{g}+\frac{6.49}{u}$  

Tags

CCSS.HSA-SSE.A.1A