Find the missing numerator so that the fractions will be equal.
= 
A. 
B. 
C. 
D. 
Answer: A
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Solve the system of equations using substitution.
A. x = 4, y = -3; x = 3, y = -4 B. x = -4, y = 3; x = -3, y = 4 C. x = 4, y = 3; x = 3, y = 4 D. x = -4, y = -3; x = -3, y = -4
Solve the problem.Tides go up and down in a 12.4-hour period. The average depth of a certain river is 11 m and ranges from 8 to 14 m. The variation can be approximated by a sine curve. Write an equation that gives the approximate variation y, if x is the number of hours after midnight if high tide occurs at 8:00 am.
A. y = 11 sin (
- 
)
B. y = 3 sin (
- 
)
C. y = 3 sin (
- 
)
D. y = 11 sin (
- 8?)
Identify the base and the exponent for the exponential expression.-(-13)9
A. Base: 13, exponent: 9 B. Base: -13, exponent: 9 C. Base: 9, exponent: -13 D. Base: 9, exponent: 13
Solve.A gardener wants to put a fence around a garden with sides of lengths 
and 
How much fencing must he buy?
A. 196 m B. 166 m C. 181 m D. 286 m