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dimulka [17.4K]
3 years ago
9

The compiled enrolled in the three grades at Willmar middle is 977. There are 356 students in the seventh grade and 365 in the e

ight grade. Write and solve an equation to find how many students are in the sixth grade.
Mathematics
1 answer:
Julli [10]3 years ago
4 0
977- (356+365) = x

356+365= 721

977- 721 = 256

x= 256

256 students in the sixth grade
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Answer:

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Step-by-step explanation:

In this case, we must observe that total cost of the dog (C(d)) is the sum of two components: i) <em>Fixed cost</em> (C_{f}) - Adoption fee, ii) <em>Variable cost</em> (C_{v}) - Daily cost of feeding the dog, both measured in US dollars.

In addition, we suppose that variable cost is directly proportional to the number of days that Kirstin owns her dog. That is:

C (d) = C_{f} + C_{v}

C(d) = C_{f} + r\cdot d

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r - Daily feeding costs, measured in US dollars per day.

If C_{f} = 75\,USD, then:

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Step-by-step explanation:

these are multiplications.

you could also write

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now, we need to calculate the contents of brackets (if we can), then do the multiplications and divisions, before we can do the then remaining additions and subtractions.

if we cannot do a calculation directly (because there is a variable involved), we need to do and document the single steps for the individual parts involved.

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