Mathematics, 09.12.2019 18:31 hardwick744

Kevin has the following averages in her
math class:
homework avg.: 88
quiz avg.: 84
test avg.: 92
final exam: ? ?
if the teachers weights homework at 20%
quizzes at 25%, tests at 40%, and the
final exam at 15%, what is the minimum
grade kevin can make on the final exam so
that she scores a 90 in the class?
a. 90
c. 86
d. 94
b. 97

Answers: 1

Show answers

Answers

Answer from: meijorjay94p2u2zy

b. 97

Step-by-step explanation:

Home work = 88

20 % of 88 = 88 x 20/100 = 17.60

Quiz Average= 84

25 % of 88 = 84 x 25/100 = 21

Test Average= 92

40 % of 92= 92 x 40/100 = 36.8

Add all = 17.60 +21+ 36.8= 75.40

Let the marks be x in final exam

The percentage is 15 % and scores a 90 in a class we can write

15x/100 + 75.40 =90

0.15x= 90-75.40

0.15x= 14.60

x= 14.60/0.15= 97

final exam marks will be 97

Answer from: Quest

answer:

payment just for service

→

87.12

payment for service including tax

→

94.09

explanation:

service only with 20% tip

→

72.6

(

100

)

87.12

in the opening of the question the word 'service' is associated only with the pretax value.

the closing part of the question asks: how much did she pay for the

service

−−−−−−

so technically the answer is

→

72.6

(

100

)

87.12

however, the intention of the question provider may have been that your answer is to be

87.12

(

100

)

94.09

to 2 decimal places.

payment just for service

→

87.12

payment for service including tax

→

94.09

tony b

mar 21, 2017

answer:

trying to explain it another way

explanation:

service charge

→

72.60

20% tip

100

72.60

14.52

−−−−−−

←

add

87.12

tax

100

87.12

6.97

−−−−−

←

add

94.09

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Kevin has the following averages in her
math class:
homework avg.: 88
quiz avg.:...

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