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DENIUS [597]
3 years ago
9

How to solve 7-(4/5×1/3)

Mathematics
1 answer:
MaRussiya [10]3 years ago
8 0
First, calculate the ones that is in the bracket, 4/5×1/3 = 4/15 (make the denominator the same), second finish the question, 7 - 4/15.
Answer, 6&11/15. (six and eleven over fifteen.
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 Sandra sells necklaces at a school craft fair. She uses the equation P= 7.5n - (2.25n + 15) to determine her total profit at th
gregori [183]
The way you find profit is to subtract the revenue and the cost
Profit = Revenue - Cost
The revenue is the amount of money coming in, the cost is the amount of money going out. The goal of course is to have the revenue larger than the cost so that the profit is positive. 

So the equation given is
P = 7.5n - (2.25n+15)
and its in the form
P = R - C
where...
R = 7.5n is the revenue equation
C = 2.25n+15 is the cost equation

Focus on the revenue equation
R = 7.5n
which is the same as 
R = 7.50*n

This tells us that Sandra pulls in a total of 7.50*n dollars where n is some positive whole number. It represents the number of necklaces sold. For example, if she sold n = 10 necklaces, then
R = 7.50*n
R = 7.50*10
R = 750
meaning that Sandra has made $750 in revenue

As you can see above, the revenue is computed by multiplying the price per necklace ($7.50) by the number of necklaces sold (n) to get R = 7.50*n

So that's why the answer is $7.50

Note: The 2.25 is part of the cost equation. This is known as the variable cost. It is the cost to make one necklace ignoring the fixed cost (eg: rent). The variable cost often doesn't stay the same, but algebra textbooks often simplify this aspect. 
8 0
3 years ago
Distributive property 7(2n+3)
Black_prince [1.1K]

its 14n+21. 7×2n is 14n, and 3×7 is 21

5 0
3 years ago
Read 2 more answers
Can someone pls show how to do this is with explanation
Keith_Richards [23]
1m = 100 cm
0.05 m = 5cm
1 km = 10000 cm
0.00005 km = 5 cm
Yes they are equal

(Mark me the brainliest if this has helped!)
4 0
2 years ago
Evan's mother used 1/3 pound of beef, 1/2 pound of shrimp, and 3 pounds of pasta to make dinner for 4 people. Use this informati
Damm [24]
B is the correct answer!

4 0
3 years ago
Solve the inequality 2x - 3 &lt; x + 2 &lt; 3x + 5 show all work. <br> Someone pls help me
andreev551 [17]

Answer:

-3/2 < x < 5......................

7 0
3 years ago
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