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Aliun [14]
4 years ago
13

13r=3/7 what is r?

Mathematics
2 answers:
Oxana [17]4 years ago
8 0
R = 3/91 since 3/7 is equal to .42857 and 13 divided by .42857 is 3/91.

worty [1.4K]4 years ago
6 0
The answer would be D) R = 3/91. Here are the steps.

1. divide both sides by 13

2. reduce 3/7 and 13 to 3/7*13

3. reduce 7 * 13 to 91.

* Reduce = Simplify.
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Just multiply ($1400/year) by (11 years).  Answer:  $15400.
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A factory sells backpacks for $40 each. The cost to make 1 backpack is $10.00. In addition to the costs of making backpacks, the
yKpoI14uk [10]

Answer:

x (40-10) -12000≥980

The factory must sell 433 backpacks to meet its weekly goal.

Hi, to answer this question we have to write an inequality.

So, since the backpacks (x) are sold by $40 and the cost of making one is $10, the revenue per bag is equal to 40x and the cost is 10x.

12,000 of operating expenses are also expenses.

So, for the profit:

Profit = revenue- cost

P = 40x-10x-12,000

P = x (40-10)-12000

The factory goal is to make a profit of at least $980 each week, so, the profit must be greater or equal than 980.

x (40-10) -12000≥980

Solving for x

30x-12000≥980

30x≥980+12000

30x ≥12980

x≥12980/30

x≥432.6

x≥433 (rounded, because if the sell 432 they will not meet the goal)

The factory must sell 433 backpacks to meet its weekly goal.

Step-by-step explanation:

4 0
4 years ago
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Answer:

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Step-by-step explanation:

Factor the equation. (It's a difference of squares, so we know the form will be (a-b)(a+b).)

y = x^{2} - 1\\y = (x-1)(x+1)

Test this by FOILing it out, if you're unsure. This is something it can be good to memorize!

Set it equal to 0.

0 = (x+1)(x-1)

Separate the two parenthetical expressions by the Zero Product Property.

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Solve for x!

x=-1, x=1

3 0
4 years ago
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