Solve the problem.Students in a math class receive a B if the average of their four test scores is between 75 and 85. Raul scored 71, 82, and 88 on the first three tests. Within what range must his score on the fourth test lie if he is to get a B?
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Sketch the curve.y2 + 4x = 20
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A town has a population of 10,000 people and is increasing by 10% every year. What will the population be at the end of 4 years?
A. 4641 people B. 13,310 people C. 14,641 people D. 14,000 people
Mathematics
Solve the system of equations by substitution.
A. x = -100, y = 27; (-100, 27) B. x = 100, y = 27; (100, 27) C. x = 100, y = -27; (100, -27) D. x = -100, y = -27; (-100, -27)
Mathematics
Solve the problem.Mardi received an inheritance of $50,000. She invested part at 7% and deposited the remainder in tax-free bonds at 12%. Her total annual income from the investments was $4500. Find the amount invested at 7%.
A. $15,000 B. $29,000 C. $45,500 D. $30,000
Mathematics