Unit 5 Lessons 12 & 14

Unit 5 Lessons 12 & 14

Fill in the Blanks

What is the sign of the result of this fraction?

 $\frac{-20}{25}$  

Multiple Choice

Evaluate.

 $\frac{-64}{-8}=?$  

• 8

• -8

•  $\frac{1}{8}$  

•  $-\frac{1}{8}$  

Poll

Which equation have we used since unit 2?

•  $\pi r^2$  

• start + (+/- change) = end

• y=kx

• y=mx+b

Poll

How do you find the constant of proportionality using this equation?

 $y=kx$  

•  $k=y+x$  

•  $k=y-x$  

•  $k=\frac{y}{x}$  

•  $k=yx$  

Fill in the Blanks

Think about the problem we just went over; what if the tank overflowed at 15,000 liters instead of 12,000. How many minutes would it take for the tank to overflow?

Fill in the Blanks

Think about the problem we just went over; what if each crack leaked 6 liters of water instead of 1/2 liters per hour. How many mins now would the emergency pump have to run?

Multiple Choice

A cookie recipe uses 3 cups of flour to make 15 cookies. How many cookies can you make with this recipe with 4 cups of flour? (Assume you have enough of the other ingredients.)

• 20 cookies

• 11 cookies

• 19 cookies

• 5 cookies

Multiple Choice

How much water is in the tank 3 mins after the sensor in the tank started?

• 42 liters

• 728 liters

• -42 liters

• -728 liters

Multiple Choice

How much water is in the tank 10 mins before the sensor in the tank started?

• 140 liters

• 910 liters

• -140 liters

• -910 liters

Multiple Choice

A bank charges a service fee of $7.50 per month for a checking account.

A bank account has $85.00. If no money is deposited or withdrawn except the service charge, how many months until the account balance is negative? (Round your number)

• 93 months

• 638 months

• 77 months

• 12 months