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primary 5 | Maths
| Area & Volume
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Jdjdjd
Date Posted: 2 years ago
Views: 637
3b+5s = 214.5
4b+3s = 181.5 ①
2s - b = 214.5-181.5 = 33 ③
8s - 4b = 4×33 = 132 ②
① + ② → = 11s = 181.5+132 = 313.5
s = 313.5÷11 = 28.5
③ 2s - b = 33 → b = 2×28.5-33 = 24
1s+1b = 28.5+24 = 52.5 (Ans)
4b+3s = 181.5 ①
2s - b = 214.5-181.5 = 33 ③
8s - 4b = 4×33 = 132 ②
① + ② → = 11s = 181.5+132 = 313.5
s = 313.5÷11 = 28.5
③ 2s - b = 33 → b = 2×28.5-33 = 24
1s+1b = 28.5+24 = 52.5 (Ans)
Oh dear also different from my teacher too. So weirdo. I also got different answer haha
Error in the addition of ① and ②. You added ② and ③ instead.
It should be :
11s = 132 + 181.50 = 313.50
s = 313.50 ÷ 11 = 28.50
③ also got error. It should be b = 2s - 33 and not 33 - 2s.
b = 2 × 28.50 - 33
= 57 - 33
= 24
So,
b + s = 24 + 28.50 = 52.50
It should be :
11s = 132 + 181.50 = 313.50
s = 313.50 ÷ 11 = 28.50
③ also got error. It should be b = 2s - 33 and not 33 - 2s.
b = 2 × 28.50 - 33
= 57 - 33
= 24
So,
b + s = 24 + 28.50 = 52.50
See 1 Answer
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It might seem impossible, but you can always make one of them to the same thing. In this case, i made both sum of money have the same number of blouse, leaving me with the difference in the sums for the skirts.
Date Posted:
2 years ago
Thabk you for helping me. So nice of you . Great . God blessing
But so weirdo. One skirt and one blouse. Answer not same as my teacher
The multiplication of the first equation is incorrect.
$214.50 × 4 = $858, not $1716
Subsequently,
11S = $858 - $544.50
11S = $313.50
S = $313.50 ÷ 11 = $28.50
$214.50 × 4 = $858, not $1716
Subsequently,
11S = $858 - $544.50
11S = $313.50
S = $313.50 ÷ 11 = $28.50
No worries. Sorry for the wrong multiplication - 4 x 214.50 is 858.
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