Rewrite the equation in standard form. Find the center and radius of the circle.x2 + y2 - 20x + 75 = 0
A. (x - 10)2 + y2 = 25
center (10, 0), r = 5
B. x2 + (y - 10)2 = 25
center (0, 10), r = 5
C. (x + 10)2 + y2 = 25
center (-10, 0), r = 5
D. (x - 10)2 + y2 = 25
center (-10, 0), r = 5
Answer: A
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Solve the problem.The hypotenuse of a right triangle is 11 feet long. One leg of the triangle is 3 feet longer then the other leg. Find the perimeter of the triangle.
A. - 
+ 
feet
B. 
- 11 feet
C. 
+ 11 feet
D. 
+ 
feet
Your weekly cost (in dollars) to manufacture x cars and y trucks is given by
?
?
Compute the marginal cost of manufacturing cars at a production level of 20 cars and 10 trucks.
?
A. $2,875,800 B. $5,600 C. $5,700 D. $100 E. $5,800
Use the information in the table to solve the problem. Write your answer as a fraction in lowest terms.The table below shows the amounts of pollutants (in parts per million) in a sample of rainwater.
Find the ratio of pollutant C to pollutant D.
A. 
B. 
C. 
D. 
Solve the problem.Linda invests src="https://sciemce.com/media/4/ppg__ttt0702190814__f1q86g6.jpg" alt="" style="vertical-align: -4.0px;" /> and 
for one year. Part is invested at 
, another part at 
, and the rest at 
. The total income from all 3 investments is 
. The combined income from the 
investments is the same as the income from the 
investment. Find the amount invested at each rate.
A. $8000 at 5%, $10,000 at 6%, $7000 at 8%
B. $10,000 at 5%, $10,000 at 6%, $5000 at 8%
C. $10,000 at 5%, $5000 at 6%, $10,000 at 8%
D. $5000 at 5%, $10,000 at 6%, $10,000 at 8%