10. A student studied 18 hours in 7 days, if he wants to study average 2 hours each day 14 days. How many hours he needs to study for next 7

Question

10. A student studied 18 hours in 7 days, if he wants to study average 2 hours each day 14 days. How many hours he needs to study for next 7 days!

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Hadley 1 week 2021-10-04T20:24:05+00:00 1 Answer 0

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    2021-10-04T20:25:58+00:00

    Answer:

    HE WILL HAVE TO STUDY 10 HOURS

    Step-by-step explanation:

    [(2 hours)/(1 day)](14 days)=(18+x)hours

    Let’s note that the unit of day is in the numerator and denominator.  It cancels

    [(2 hours)/(1 day)](14 days)=(18 hours)+(x hours)

    (2 hours)(14)=(18+x)hours

    Let’s note that the unit of hours is in the numerators of both sides of the equation.  It cancels

    (2 hours)(14)=(18+x)hours

    (2)(14)=18+x

    28=18+x

    10=x

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45:7+7-4:2-5:5*4+35:2 =? ( )