3. Tia deposited x dollars in a bank account that paid 4% interest. She also deposited y dollars in a bank account that paid 8% interest. The system below represents one year's interest on Tia's deposits.

   { 0.04 x + 0.08 y = 240 0.04 x = 0.08 y left brace . table with 2 rows and 2 columns , row1 column 1 , 0.04 , x plus , 0.08 , y , column 2 equals 240 , row2 column 1 , 0.04 , x , column 2 equals , 0.08 , y , end table

   Based on the solution of the system of equations, which of the following can you conclude?

   1. Tia deposited $3000 in each account, and the amounts of interest earned were $240 and $120.
   2. Tia deposited $3000 in each account, and the amount of interest earned in each account was $120.
   3. The deposit amounts were $3000 and $1500, and the amounts of interest earned in each account were $240 and $120.
   4. The deposit amounts were $3000 and $1500, and the amount of interest earned in each account was $120.

4. The total area of the parallelogram below is 4 x 4 + 3 x 3 − 14 x 2 + 33 x − 35 . 4 x to the fourth , plus , 3 x cubed , minus , 14 x squared , plus 33 x minus 35 .  Which of the following expressions best represents the length of the base of the parallelogram? (Hint: A = b h eh equals b h )

   

   6. x 3 + 2 x 2 − x + 7 x cubed , plus 2 , x squared , minus x plus 7
   7. x 3 − 2 x 2 + x − 7 x cubed , minus , 2 x squared , plus x minus 7
   8. 4 x 4 + 3 x 3 − 14 x 2 + 33 x − 7 4 x to the fourth , plus 3 , x cubed , minus , 14 x squared , plus 33 x minus 7
   9. x 3 + 5 x 2 − x + 5 x cubed , plus 5 , x squared , minus x plus 5
5. Which point corresponds to a zero of the function f ( x ) = x 2 + 2 x − 15 ? f open x close equals , x squared , plus 2 x minus 15 question mark
   1. ( 0 , − 15 ) open 0 comma negative 15 close
   2. ( 5 , 0 ) open 5 comma 0 close
   3. ( − 5 , 0 ) open negative 5 comma 0 close
   4. ( − 3 , 0 ) open negative 3 comma 0 close

6. Solve the equation x 2 + 3 w = P x squared , plus 3 w equals p  for x.

   6. x = P − 3 w x equals p minus 3 w
   7. x = ± P 3 w x equals plus minus , square root of fraction p , over 3 w end fraction end root
   8. x = ± P − 3 w x equals plus minus . square root of p minus 3 w end root
   9. x = ± P + 3 w x equals plus minus . square root of p plus 3 w end root

7. A bridge supported by a parabolic arch spans a stream of water 180 feet wide. There must be a clearance of at least 40 feet over a 100-foot channel in the middle of the stream. The origin is placed at water level directly below the center of the arch. Which equation best represents the situation?

   

   1. y = 140 ( x + 180 ) ( x − 180 ) y equals 140 open x plus 180 close open x minus 180 close
   2. y = − 1 140 ( x + 90 ) ( x − 90 ) y equals negative , 1 over 140 . open , x plus 90 , close . open , x minus 90 , close
   3. y = − 1 140 ( x + 40 ) ( x − 40 ) y equals negative , 1 over 140 . open , x plus 40 , close . open , x minus 40 , close
   4. y = 140 ( x + 40 ) ( x − 40 ) y equals 140 open x plus 40 close open x minus 40 close

8. Sofia has $25 in her savings account. She plans to deposit between $5 and $10 each week into her account. On the graph, line m represents a deposit of exactly $5 per week and line n represents a deposit of exactly $10 per week.

   
   Image Long Description

   If Sofia deposits between $5 and $10 per week, which region on the graph represents all possible balances in her account?

   6. A
   7. B
   8. C
   9. A and C combined

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