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anzhelika [568]
3 years ago
9

When I multiply by 4, add 12, divide by 2, then square root, I get 10. What number did I start with?

Mathematics
2 answers:
Scorpion4ik [409]3 years ago
8 0

Answer:

22

Step-by-step explanation:

To begin, the most reasonable way of figuring out the answer is creating an equation.

In that case, we can represent all possible numbers with the variable "N"

We basically have that 4n + 12 divided by 2 = 100 (because 10^2 = 100)

Simplifying:

4n + 12  ÷  6 = 100

Multiplying each side by 6:

24n + 72 = 600

Subtracting 72:

528

Dividing by 24:

N = 22

<u>Check:</u>

22 * 4 =  88. 88 + 12 = 100. Square rooting gives 10. Thus, an answer that the number you started with was 22 is correct.

Karo-lina-s [1.5K]3 years ago
7 0

Answer:

4

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago
Consider the expression 625(5xy)^-3/ (5x)^2 y^7
andre [41]
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             625 
= --------------------   /  25x^2y^7
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3 0
3 years ago
What are the zeros of the polynomial function? <br><br> F(x)= x^2 +12x
Pavel [41]

Answer:

x = 0 and x = -12 are the two zeroes

Step-by-step explanation:

"Zeroes" of a function are also called the solutions, roots or x intercepts.

The zeroes are the numbers that give the function a values of 0, so find what value for 'x' yields F(x) = 0 as a result.

With quadratic equations (equations with x² as the largest exponent), you factor the equation.  

Step 1: Set the equation equal to zero

  x² + 12x = 0

 Depending on the equation, there are several methods you can use to factor, for this one we can factor out an 'x' since both terms have an 'x' in them.  We get...

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So now, using the "zero product property" which means that if two things are multiplied together, and the result is zero, then either the first term is zero, the second term is zero, or they are both zero.  So we set each term equal to zero and solve.

So

either    x = 0     or        x + 12 = 0

Solve each for x to get your two anwers.

x= 0 is already solved, so 0 is our first zero

Now solve

x + 12 = 0  

  x = -12             (subtract 12 from both sides to isolate x)

 

8 0
3 years ago
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