Lesson 8: Practice Problems

Problem 1

The table shows five transactions and the resulting account balance in a bank account, except some numbers are missing. Fill in the missing numbers.

Clare has $54 in her bank account. A store credits her account with a $10 refund. How much does she now have in the bank?
Mai’s bank account is overdrawn by $60, which means her balance is -$60. She gets $85 for her birthday and deposits it into her account. How much does she now have in the bank?
Tyler is overdrawn at the bank by $180. He gets $70 for his birthday and deposits it. What is his account balance now?
Andre has $37 in his bank account and writes a check for $87. After the check has been cashed, what will the bank balance show?

Add.

Which is greater, $\frac{- 9}{20}$ or -0.5? Explain how you know. If you get stuck, consider plotting the numbers on a number line.

Decide whether or not each equation represents a proportional relationship.

Volume measured in cups ( $c$ ) vs. the same volume measured in ounces ( $z$ ): $c = \frac{1}{8} z$
Area of a square ( $A$ ) vs. the side length of the square ( $s$ ): $A = s^{2}$
Perimeter of an equilateral triangle ( $P$ ) vs. the side length of the triangle ( $s$ ): $3 s = P$
Length ( $L$ ) vs. width ( $w$ ) for a rectangle whose area is 60 square units: $L = \frac{60}{w}$