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OverLord2011 [107]
2 years ago
6

Find the surface area Will give brainliest to first answer!!!!

Mathematics
1 answer:
user100 [1]2 years ago
7 0
120 I think I’m not sure
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What are the solutions to the equation?<br> 7x^3=28x
11Alexandr11 [23.1K]

7x³ = 28x is our equation. We want its solutions.

When you have x and different powers, set the whole thing equal to zero.

7x³ = 28x

7x³ - 28x = 0

Now notice there's a common x in both terms. Let's factor it out.

x (7x² - 28) = 0

As 7 is a factor of 7 and 28, it too can be factored out.

x (7) (x² - 4) = 0

We can further factor x² - 4. We want a pair of numbers that multiply to 4 and whose sum is zero. The pairs are 1 and 4, 2 and 2. If we add 2 and -2 we get zero.

x (7) (x - 2) (x + 2) = 0

Now we use the Zero Product Property - if some product multiplies to zero, so do its pieces.

x = 0        -----> so x = 0

7 = 0       -----> no solution

x - 2 = 0   ----> so x = 2   after adding 2 to both sides

x + 2 = 0  ---> so = x - 2  after subtracting 2 to both sides


Thus the solutions are x = 0, x = 2, x = -2.

6 0
3 years ago
A coat cost $ 131.61 with 9.5% sales tax
marysya [2.9K]

Calculating Total Cost. Multiply the cost of an item or service by the sales tax in order to find out the total cost. The equation looks like this: Item or service cost x sales tax (in decimal form) = total sales tax. Add the total sales tax to the Item or service cost to get your total cost. Multiply retail price by tax rate

Let's say you're buying a $100 item with a sales tax of 5%. Your math would be simply: [cost of the item] x [percentage as a decimal] = [sales tax]. That's $100 x .

6 0
3 years ago
What is 5682 divided by 4
Sophie [7]
5682 divided by 4 is 1420 remainder 2 Hope that helped Have a good day! :-)
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3 years ago
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which is the equation of a hyperbola centered at the origin with focus ( 0,4) and vertex (0,sqaure root 12)
andrew-mc [135]

Answer:

the equation of the hyperbola is y^2/12-x^2/4=1

Step-by-step explanation:

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How many people in the survey worked on Election Day?
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69 I’m pretty sure don’t get me wrong
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