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Brums [2.3K]
3 years ago
11

What expressions are equivalent to (a^2-16)(a+4)

Mathematics
1 answer:
Eddi Din [679]3 years ago
7 0

Answer:

[(a)^2-(4^2)](a+4)

Step-by-step explanation:

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A bookstore in the mall is trying to determine how many mall shoppers are interested in purchasing
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Answer:

O no, because people in the bookstore are interested in purchasing books, so they do  not represent all shoppers in the mall

Step-by-step explanation:

In the bookstore, the best method which the store keeper wanted to adopt is actually not a sample representation of the population. This is because, since it would be a survey of those that interested in purchasing books as gifts, it should be able to factor in other purchasers in the mall rather than those who purchase from the bookstore only.

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What is the domain (plz answer)
DochEvi [55]

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3 0
4 years ago
3.1.3 How far was the hiker at 10:30?
umka21 [38]

Answer:

y = 1400 + 5.2x --- Running cost

y = 25 x --- Monthly income

71 cars

R1775

Step-by-step explanation:

Given

Expenses

Salaries = 1400.00

Others = 5.20 per car

Income

Rate = 25.00 per car

Solving (a): Expression for the running cost

This is calculated as:

y = Salary + Others * x

Where

y = Total running cost

x = number of cars

So:

y = 1400 + 5.20 * x

y = 1400 + 5.2x

Solving (b): Expression for monthly income

This is calculated as:

y = Rate * x

Where

y = Total income

x = number of cars

So:

y = 25.00 * x

y = 25 x

Solving (c): Break even

To do this, we equate the expressions in (a) and (b)

y = y

25x = 1400 + 5.2x

Collect Like Terms

25x -5.2x= 1400

19.8x= 1400

Solve for x

x = \frac{1400}{19.8}

x = 71

Solving (d): How much to break even

Substitute 71 for x in any of (a) or (b)

y = 25 x

y = 25 * 71

y = 1775

<em>Solving (e): There is no question to answer on the "graph"</em>

5 0
3 years ago
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