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Jack purchased 8 apples
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28 Apr 2021, 08:45
28 Apr 2021, 08:45
Expert Reply
3
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00:00
Question Stats:
27% (02:58) correct
72% (03:16) wrong based on 11 sessions
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Jack purchased 8 apples, 5pers, and 6 oranges for $8.70
Cindy 10 apples, 4 pears, and 3 oranges for $7.95
Sarah 5 apples,7 pears, and 8 oranges for $8.90
Select all that apply
A. An apple costs more than a pear
B. An orange costs more than a pear
C. an orange costs $0.45
D. An orange costs less than an apple
E. An orange costs less than a pear
Cindy 10 apples, 4 pears, and 3 oranges for $7.95
Sarah 5 apples,7 pears, and 8 oranges for $8.90
Select all that apply
A. An apple costs more than a pear
B. An orange costs more than a pear
C. an orange costs $0.45
D. An orange costs less than an apple
E. An orange costs less than a pear
ShowHide Answer
Official Answer
A,B,C,D
Re: Jack purchased 8 apples
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07 May 2021, 01:41
07 May 2021, 01:41
1
Quote:
Jack purchased 8 apples, 5pers, and 6 oranges for $8.70
Cindy 10 apples, 4 pears, and 3 oranges for $7.95
Sarah 5 apples,7 pears, and 8 oranges for $8.90
Cindy 10 apples, 4 pears, and 3 oranges for $7.95
Sarah 5 apples,7 pears, and 8 oranges for $8.90
8A+5P + 6O = 8.7 --- I
10A + 4P + 3O = 7.95 ----II
5A + 7P + 8O = 8.9----- III
Multiplying III with 2 and subtracting from II, to eliminate A
10P + 13O = 9.85 --- IV
Multiplying I by 5, III by 8 and then subtracting them, to eliminate A
31P + 34O = 27.6 ---- V
Multiplying IV by 31, V by 10 and then subtracting them, to eliminate P
O = 0.46
P = 0.38
A = 0.58
A,B,D
