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Mariulka [41]
3 years ago
5

Reuben has scored 70, 75, 83, and 80 on four Spanish quizzes. What score must he get on the next quiz to get an average of at le

ast 80?
Mathematics
2 answers:
butalik [34]3 years ago
6 0

Answer:

Step-by-step explanation:

MY D. I. C. K.

inna [77]3 years ago
6 0

Answer:

92

Step-by-step explanation:

Let x be the additional number.

Therefore Reuben score will be

70, 75, 83, 80 and x.

From the question, we were told that the next mark will make Reuben to have an average of 80. This can be illustrated below:

Mean = sum of marks / numbers of mark

Mean = 80

Number of mark = 5

80 = (70 + 75 + 83 + 80 + x) / 5

80 = (308 + x) / 5

Cross multiply

308 + x = 80 x 5

308 + x = 400

Collect like terms

x = 400 — 308

x = 92

Reuben must score at least 92

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Step-by-step explanation:

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7 0
3 years ago
1. Between finishing their dinner and going to bed, Zac and Lucy had 4 hours.
Leviafan [203]

Answer:

Ok, I can see only a) to c)

a) Lucy spent the most time reading.

b) 20 minutes.

c) 22 minutes.

Step-by-step explanation:

Reason for b):

First convert hours to minutes.

1 hour = 60 minutes

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Total in the pie chart is 360° so:

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Do you understand, Kiara 12004?

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