In 8–10, a teacher gave a test with 50 questions, each worth the same number of points. donovan got 39 out of 50 questions right. marci's score was 10 percentage points higher than donovan's. 8. what was marci's score? explain. 9. how many more questions did marci answer correctly? explain. 10. explain how you can check your answers for reasonableness. answer soon !

8. 39x1.10 (1.10=110% aka Marcis mark in comparison to donovan)

9. 5. 50x0.1 (0.1=10%)

$53.50

step-by-step explanation:

you have to subtract the amount of money chuck earned ($72.50) by the cost of the gas for the mower ($11.25) and the new string for the trimmer he bought ($7.75).

72.50-11.25=61.25

and then subtract $61.25 by the second thing he bought (the new string for the trimmer)

61.25-7.75=53.5

so in total it's $53.50 (53 dollars and 50 cents)

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x