Solve the rational equation.
- 5 = 
A. {-3}
B. {4}
C. {-4}
D. {20}
Answer: C
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Provide an appropriate response.Perform the operation and simplify, expressing answer with a positive exponent in lowest terms: 
A. x13/15 B. x3/8 C. x2/15 D. 2x
Solve the problem.Andy has 18 coins made up of quarters and half dollars, and their total value is $7.00. How many quarters does he have?
A. 8 quarters B. 13 quarters C. 12 quarters D. 10 quarters
Solve the problem.An agricultural research scientist is developing three new crop growth supplements -- A, B, and C. Each pound of each supplement contains four enzymes -- E1, E2, E3, and E4 -- in the amounts (in milligrams) shown in the table.
The cost of E1 is $20/mg, the cost of E2 is $40/mg, the cost of E3 is $10/mg, and the cost of E4 is also $10/mg. The growth benefit for crops is expected to be proportional to 10 times the amount of A used, 25 times the amount of B used, and 60 times the amount of C used. However, the total cost of the enzymes used in A, B, and C must be less than $5000 for each treatment. How many pounds each of A, B, and C should be produced to maximize
the growth effect? A.
| 0, 9.3, 10.0 |
B. 0, 0, 15
C. 9.0, 0, 9.5
D. 3.0, 3.0, 4.0
Find the root if it is a real number.
A. 23 B. 64 C. 8 D. -8