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sashaice [31]
2 years ago
4

Erin and Jamie are collecting shells while the tide is out. Erin has 27 shells, and she has 9 more than Jamie. Write and equatio

n for this situation and find how many shells Jamie has collected.
A. 27 = j + 9; Jamie collected 18 shells
B. 27 = j – 9; Jamie collected 36 shells
C. 27 + 9 = j; Jamie collected 36 shells
D. 27 = j + 9; Jamie collected 36 shells
Mathematics
2 answers:
Shtirlitz [24]2 years ago
7 0

A.

Erin's total minus 9 gives us Jamie's total. This means Erin's total equals Jamie's total plus 9. This leads us to the conclusion that 27 (E's total) = j + 9 (the difference). We also know from the first phrase that E - 9 = j, meaning 27 - 9 = j, so j = 18.

kompoz [17]2 years ago
3 0

Answer:

The correct answer is A.

Step-by-step explanation:

The main idea in this kind of exercises is to ‘‘translate’’ from natural language to mathematical language.

We know that Erin has 27 shells. If we use the variable E for the number of shells that Erin has, we ‘‘translate’’ the previous fact as E=27.

The next data is that Erin has 9 shells more than Jamie. Let us write J for the number of shells that Jamie has. The fact that Erin has 9 shells more than her partner means that Jamie would need 9 shells more to has the same amount of shells. Mathematically this means that J+9=E.

Then, substituting the value of E we get J+9=27. The last step is to obtain the value of J: J=27-9.

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The remaining plant food is: 1 7/12 kg

Step-by-step explanation:

Given

Total Plant food = 3 1/2 kg

Plant food used on Strawberry Plants = 1 2/3 kg

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We will first calculate the total food plant used and then subtract the used plant food from the total plant food.

So,

Total\ Plant\ Food\ used=1\frac{2}{3}+\frac{1}{4}\\=\frac{5}{3}+\frac{1}{4}\\=\frac{20+3}{12}\\=\frac{23}{12}

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Left\ Food\ Plant=3\frac{1}{2}-\frac{23}{12}\\=\frac{7}{2}-\frac{23}{12}\\=\frac{42-23}{12}\\=\frac{19}{12}\\=1\frac{7}{12}

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Keywords: Division, Fractions

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Step-by-step explanation:

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Sebastian described the movement as 9 + -7, which is wrong - 9 should be -9 and -7 should be 7.

Hope this helped!

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