Solve the system by the addition method.7x2 + y2 = 497x2 - y2 = 49
A. {(0, 7), (0, -7)}
B. {(7, 0), (-7, 0)}
C. {(
, 0), (-
, 0)}
D. {(0, 
), (0, -
)}
Answer: C
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Solve the problem.The information in the chart gives the salary of a person for the stated years. Model the data with a linear function using the points 
and 
A. y = -1242x + 23,500 B. y = 1000x C. y = 28.2x + 23,500 D. y = 1000x + 23,500
Solve the equation. Express radicals in simplest form.x2 = 0.49
A. {24.5} B. {-0.7, 0.7} C. {-8, 8} D. {0.7}
Solve the problem.Softee Blankets charges $5 for shipping orders of $20 or less, $10 for orders from $20.01 to $70, and $15 for orders over $70. One week shipping charges for 500 orders totaled $4850. There were 30 more orders for $20 or less shipped than there were orders for over $70. Find the number of orders shipped at each rate.
A. $20 or less: 270; $20.01 to $70: 110; over $70: 120 B. $20 or less: 150; $20.01 to $70: 230; over $70: 120 C. $20 or less: 230; $20.01 to $70: 150; over $70: 120 D. The numbers cannot be determined from the given information.
Multiply.0.017
A. 0.001258 B. 0.01258 C. 1.258 D. 0.0001258