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qaws [65]
3 years ago
9

Which of the following is equivalent to the expression below?

Mathematics
1 answer:
Mashcka [7]3 years ago
7 0
\sqrt{-98} = \sqrt{(-49 x 2)} = \sqrt{-49} \times sqrt{2} = 7i\sqrt{2}
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For 2 sweaters for that price what percent discount is that?
Harrizon [31]

Answer: 75% off


Step-by-step explanation:

Your first sweater is the full 100% of the cost. The second it only 50 percent. If you add these to find out how many percent you will pay which is 150 for both. If you were to divide by 2 you get 75 percent off each sweater. The first sweater is $48 the second you multiply by .5 (as its 50 percent off ) and the cost is $24 dollars. 48 plus 24 is 72 then that divided by 2 is 36. Now 36$ is the price per sweater.  36/48 or  3/4 (which is 75%)

6 0
3 years ago
 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
24is 40% of what number? Use the percent eqation.
scoray [572]

Answer:

60

Step-by-step explanation:

40%=0.40

0.4x=24

x=24/0.4

x=60

4 0
3 years ago
Find the volume of the regular pyramid given that 12 cm is the height of the pyramid.
PolarNik [594]

Answer:

256.4

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
The total dinner bill for five persons at a restaurant was $203.25. What was the average cost per person in dollars ?
Norma-Jean [14]
Hello! To find the average of something, multiply the total of something by the number of units. In this case, we divide the total bill by 5 people to get the average cost per person. 203.25/5 is 40.65. There. The average cost of dinner per person was $40.65.
7 0
3 years ago
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