Rates, Ratios, and Proportions

Rates, Ratios, and Proportions

Lesson 31

Multiple Choice

The simplest form of  $\frac{3}{6}$  is  $\frac{1}{2}$  . When you ________ a fraction, you are writing it in its simplest form. 

• enlarge

• reduce

Fill in the Blanks

 $2.3-3.6\div4-1.7$  

Fill in the Blanks

 $\frac{-0.4+1.3\cdot4}{0.5-5.1\div3}$  

Fill in the Blanks

Solve:  $8x=112$  

x = 

Fill in the Blanks

 $2.5y=62.5$  
y = 

Multiple Choice

Which is the better buy?

• 8 boxes for $4.96

• 5 boxes for $3.25

Fill in the Blanks

A chemist raised the temperature of a liquid  $45\degree F$  in 1 minute. What is the amount of degrees in 1 second? (answer with only the number, no symbols)

Fill in the Blanks

Jamie typed 20 pages of a document in 2 hours. How many pages did she type in 1 minute? If necessary, round to the nearest hundredths place.

Fill in the Blanks

 $\frac{c}{7}=\frac{3}{21}$  
c = 

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 $\frac{5}{n+2}=\frac{10}{16}$  

n = 

Fill in the Blanks

The ratio of blue chips to red chips in a bag of chips is 5:7. There are 60 total chips in the bag. How many blue chips and how many red chips are there? Answer with number of blue chips, followed by a comma, followed by number of red chips. No spaces.

Fill in the Blanks

A map shows a 5.5-inch distance from Orange City to Newtown, and a 3.75-inch distance from Newtown to Westville. The scale of the map is  $\frac{1\ in}{100\ mi}$  . What is the actual distance from Orange City to Westville, going through Newtown? 

Fill in the Blanks

If Jeff walks 4 miles in 48 minutes, how far does he walk in 72 minutes?