MCAS 1998, 10th Grade Math, Questions 9 to 12

Question #9

The line t is a line of symmetry for figure MNOPQ. What is the measure of angle NOP?

A. 70°

B. 110°

C. 140°

D. 160°

Question #10

A repair service charges $25 to send a service person on a call and $30 per hour for labor. If h stands for the number of hours of labor, which expression below can the company use to compute the charge for the service call?

A. 25h + 30

B. 55h

C. 25 / 30h

D. 25 + 30h

Question #11

A test on a sample of 492 in-line skate wheels identified 3 defective wheels. Based on this rate of defects, approximately how many defective wheels will be found per 10,000 wheels?

A. 20

B. 60

C. 100

D. 300

Question #12

Karl needs to have his car towed to a repair shop. He received the following estimates for towing.

Best Towing . . . . . .$32 plus $2.00 per mile
Ace Towing . . . . . .$26 plus $2.50 per mile
Bert's Towing:
- . . . . .$50 for 0—20 miles
- . . . . .$100 for 21—50 miles

If the distance to the repair shop is 35 miles, what is the least amount he could pay for towing?

A. $70.00

B. $82.50

C. $100.00

D. $102.00

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