Olivia earns $8.50 per hour for babysitting her brother. She also earns a weekly bonus of $12 if she helps with Last week, Olivia helped with the laundry and earned a total of $139.50 for h hours of babysitting. Based on this situation,
which statement is true?
A. Olivia babysat for a total of 20.5 hours.
B. Olivia babysat for a total of 15 hours.
C. Olivia babysat for a total of 7 hours.
D. Olivia babysat for a total of 8.5 hours.

Olivia babysat for a total of 15 hours.

Step-by-step explanation:

8.50(h) + 12 = 139.50

In order to get a direct result of the hours she

worked, we have to subtract 12 on both sides:

8.50(h) + 12 - 12 = 139.50 - 12

In order to fine the value of time she spent, we have to divide the amount of money she got on both sides:

8.50(h) = 127.5

 8.50   =  8.50

    h     =     15

Therefore, Olivia babysat for a total of 15 hours.

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step-by-step explanation:

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answer

a,b, and d

explanation

a reflection angle is more than

but less than;

an angle that measures

is a reflex angle.(true)

an angle that measures less than

is acute.(true)

provided we are considering angles greater or equal to zero.

an acute angle lies in the range.

an obtuse angle is less than 180° but more than 90°

an angle that measures 300° is obtuse (false)

an angle that measures 65° is an acute angle.(true)