MAFS.912.A-REI.2.4.a Post-Test 1. Solve the equation and check for

MAFS.912.A-REI.2.4.a Post-Test 1. Solve the equation and check for

MAFS.912.A-REI.2.4.a
Post-Test
1. Solve the equation and check for extraneous solutions.
Standardized Test Practice
____
2. Which is the solution of the equation
?
a.
b.
c.
d.
____
3. Get Moving Fitness Center charges a monthly membership fee of $65, plus a one-time initiation fee of $125
to join the club. Which equation gives the average cost y in dollars for x months of membership?
a.
b.
c.
d.
____
4. Solve the equation
.
a.
b.
c.
d.
____
5. Which statement about an extraneous solution is correct?
a.
b.
c.
d.
____
It comes from correct solution steps and is a valid solution of the equation.
It comes from correct solution steps and is not a valid solution of the equation.
It comes from incorrect solution steps and is a valid solution of the equation.
It comes from incorrect solution steps and is not a valid solution of the equation.
6. Miriam is starting a lawn mowing business. She bought a mower for $450 and will spend about $1.20 per
hour on gasoline. If x represents the number of hours she mows, which expression shows the average cost per
hour for Miriam to do business?
a.
b.
c.
d.
____
7. Which is an extraneous solution of the equation
?
a.
b.
c.
d.
Solve each equation.
8.
9.
10.
11.
Solve each equation. Check for extraneous solutions.
12.
13. Melissa deposited $2580 in an account 3 years ago. The interest is compounded once a year, and the equation
r=
, where A is the current balance, can be used to calculate the interest rate. If the interest rate is
3.5%, how much does Melissa currently have in her account? Round your answer to the nearest cent. (HINT:
Write the interest rate as its decimal equivalent before substituting it into the equation.)
MAFS.912.A-REI.2.4.a
Answer Section
1. ANS:
Check:
Extraneous Solution

PTS:
2. ANS:
NAT:
3. ANS:
NAT:
4. ANS:
TOP:
5. ANS:
TOP:
6. ANS:
TOP:
7. ANS:
TOP:
8. ANS:
1
REF: 9.6
NAT:
A
PTS: 1
REF:
A.SSE.2 | A.CED.1 | A.REI.2 | F.IF.5
D
PTS: 1
REF:
A.SSE.2 | A.CED.1 | A.REI.2 | F.IF.5
D
PTS: 1
REF:
Standardized Test
KEY:
B
PTS: 1
REF:
Standardized Test
KEY:
C
PTS: 1
REF:
Standardized Test
D
PTS: 1
REF:
Standardized Test
PTS: 1
TOP: End Ch Test
9. ANS:
A.REI.2
7.5
TOP: Post Test
TOP: Standardized Test
7.5
TOP: Standardized Test
8.3
NAT: A.SSE.2 | A.REI.2 | A.REI.11
rational equation | extraneous solution
8.3
NAT: A.SSE.2 | A.REI.2 | A.REI.11
rational equation | extraneous solution
8.4
NAT: A.CED.1 | A.REI.2
9.6
NAT: A.REI.2
REF: 8.3
NAT: A.SSE.2 | A.REI.2 | A.REI.11
KEY: rational equation | extraneous solution
PTS: 1
TOP: End Ch Test
10. ANS:
REF: 8.3
NAT: A.SSE.2 | A.REI.2 | A.REI.11
KEY: rational equation | extraneous solution
PTS: 1
REF: 8.3
NAT: A.SSE.2 | A.REI.2 | A.REI.11
TOP: End Ch Test KEY: rational equation | extraneous solution
11. ANS:





Check:






Solution: x
16
PTS: 1
12. ANS:
REF: 9.6
NAT: A.REI.2
TOP: Skills Practice

Solution: x
2
Extraneous solution
PTS: 1
13. ANS:
REF: 9.6
NAT: A.REI.2
TOP: Skills Practice
The current balance is approximately $2860.49.
PTS: 1
REF: 9.6
NAT: A.REI.2
TOP: Skills Practice