Maria spend 5 hours studying and earned a 90 on her exam. If you want to score a 81, how much time do you need to spend studying
?
1 answer:
Answer:
4hrs 30 mins
Step-by-step explanation:
5hrs-90
x-81
cross multiplying gives us
405-90x then dividing through made x=4.5 which is = 4hrs 30mins
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Answer:
64.81
Step-by-step explanation:
x + .08x = 875
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x = 810.19 (price of tv)
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Answer:
first one is square root
don't know the second tho
