Rate, Interest, Mixture problems

Todd takes out a student loan for $25,000. The annual interest rate on the loan is 7.75%. If Todd will be paying $38,750 in interest alone, how many years is he taking to pay off the loan?

What are you asked to find?

• i

• p

• r

• t

Todd takes out a student loan for $25,000. The annual interest rate on the loan is 7.75%. If Todd will be paying $38,750 in interest alone, how many years is he taking to pay off the loan?

What is the interest formula?

• $i=pr^2$

• $i=pt^2$

• $i=prt$

• $i=p^2r$

Tags

CCSS.6.EE.B.7

Todd takes out a student loan for $25,000. The annual interest rate on the loan is 7.75%. If Todd will be paying $38,750 in interest alone, how many years is he taking to pay off the loan?

7.75% is written as a decimal:

• 7.75

• 0.775

• 0.0775

• 0.00775

Tags

CCSS.7.RP.A.3

Todd takes out a student loan for $25,000. The annual interest rate on the loan is 7.75%. If Todd will be paying $38,750 in interest alone, how many years is he taking to pay off the loan?

Using the Interest Formula. Solve for t to determine the number of years to pay off the loan.

• 5

• 10

• 15

• 20

Tags

CCSS.6.EE.B.7

One person can do a certain job in forty minutes, and another person can do the same job in one hour. How many minutes will they take to do the job together.

• 50 min

• 38 min

• 24 min

• 17 min

Tags

CCSS.HSA.CED.A.1

How much of an alloy with 30% copper must be added to 25 pounds of a second alloy which is 20% copper to create a 27% alloy?

Which of the following equations represents the situation?

• $30\left(25\right)+20\left(25\right)=27\left(25\right)$

• $.30x+.20\left(25\right)=.27\left(25+x\right)$

• $30\%+25\%x=20\%+x$

How much of an alloy with 30% copper must be added to 25 pounds of a second alloy which is 20% copper to create a 27% alloy?

• 33.85 lb

• 391.67 lb

• 58.33 lb

• 122.22 lb

Tags

CCSS.HSA.CED.A.1