Operations w/ Positive and Negative Numbers (Week 6)

Justin put $2,500 into a savings account. He earns 4% interest that is compounded yearly. How much money will Justin have after 1 year? Hint: Use the equation Interest = principal x rate x time (I=prt)

Justin put $2,500 into a savings account. He earns 4% interest that is compounded yearly. How much money will Justin have after 2 years? Hint: Use your answer from #7 as your principal.

Justin put $2,500 into a savings account. He earns 4% interest that is compounded yearly. How much money will Justin have after 3 years? Hint: Use your answer from #8 as your principal.

2/3 + 1/9 =

1/2 + 2/5 =

1/2 - 1/8 =

12/15 - 1/5 =

Add the rational numbers.

3.45 - 2.10

42.8 - 6.1

Rebecca found a shirt she liked in the clearance aisle for 25% off the original price. If the original price of the shirt was $28, how much will Rebecca be saving when she buys it?

Bob is buying a jacket that regularly costs $65. However, the jacket is on sale for 20% off the regular price. A sales tax of 7% will be added to the final purchase price. How much will Bob pay for the jacket, including tax?

One Monday in December, it was −2 ºC in Beijing, China. On the same day, it was about 7 degrees warmer in Shanghai than it was in Beijing. What was the temperature in Shanghai? (Use the degree symbol in your answer from the keyboard in your answer)

On Tuesday in Harbin, the temperature started at −6 ºC and reached a high of 3ºC. By how much did the temperature rise throughout the day? (Use the degree symbol in your answer from the keyboard in your answer)

A music store buys instruments and then sells them for 30% more than they paid. If the store buys a guitar for $45, what will the store sell it for?

A music store buys instruments and then sells them for 30% more than they paid. If the price tag on a trumpet says $104, how much did the store pay for it?

**Select the corresponding letters below**

Select ALL that apply.

Find the constant of proportionality (k). Using the value for k, enter an equation in the form of y=kx.

Find the constant of proportionality (k). Using the value for k, enter an equation in the form of y=kx.

Find the constant of proportionality (k). Using the value for k, enter an equation in the form of y=kx.