Solve the problem.Liz ran 36 mi, 10 mi, and 18 mi during three weeks. How many miles must she run the fourth week to give her an average of 20 miles per week?
A. 20 mi
B. 21.3 mi
C. 21 mi
D. 16 mi
Answer: D
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The slope of the graph of a linear function is the same as the rate of change of the linear function.
Answer the following statement true (T) or false (F)
Evaluate the function.r(x) = -
; r(1)
A. 4 B. 3 C. 1 D. -3
Solve the problem.The grade resistance F of a car traveling up or down a hill is modeled by the equation F = W sin ?, where W is the weight of the car and ? is the angle of the hill's grade (? > 0 for uphill travel, ? < 0 for downhill travel). A 2025-lb car has just rolled off a sheer vertical cliff (? = -90°). What is the car's grade resistance?
A. 0 lb B. -2025 lb C. 2025 lb D. undefined
Solve the following system by any appropriate method. If there is no real number solution, so state.x2 + y2 = 14
- 
= 1
A. (2, 
), (2, -
), (-2, 3
), (-2, -3
)
B. (2, 
), (2, -
), (-2, 
), (-2 -
)
C. (2, 3
), (2, -3
), (-2, 3
), (-2, -3
)
D. no real solution