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AleksandrR [38]
3 years ago
11

Nadia charges $7.50 an hour for babysitting. She babysits 18.5 hours the first week of the month and 20 hours the second week of

the month. To find her total earnings for those two weeks, Nadia writes 7.5 x 18.5 = 20 = $158.75. Explain her error. Show the correct solution.
Mathematics
1 answer:
melisa1 [442]3 years ago
5 0
7.5× 18.5=138.75 first week
7.5×20=$150 second week
total earnings 138.75+150=$288.75
She did multiply correctly 7.5 ×18.5 but got the wrong figure resulting in in lower pay and she did not multiply the 7.5 × 20 in the seond week. She shouldve added the week one and two wages to get her pay for 2 weeks
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Cost of X company = \$ 0.35+(\$0.05\times 1 \ minute)

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Cost of X company for n minutes = \$ 0.35+(\$0.05\times n \ minute)

Cost of Y Company for n minutes =\$ 0.15+(\$0.04\times n \ minute)

Difference for n minutes we get by Subtracting Cost of Y Company for n minutes by Cost of X company for n minutes

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