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babunello [35]
3 years ago
15

GEOMETRY PROBLEM THAT IS SOO HARD FOR ME PLEASE HELP ME!!!!

Mathematics
1 answer:
12345 [234]3 years ago
3 0
59.5 feet
Work:
17/10 = x/35
10x=595
59.5
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Which of the following is the best estimate of 3/8
defon

Answer:

Step-by-step explanation:

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2 years ago
Does anyone understand how to do this
Lerok [7]

Answer:

Step-by-step explanation:

I understand it!  (But I'm a high school math teacher so it might be unfair!) ; )

Anyway you have 2 numbers.  You don't know what they are so we will call them x and y.  Our first statement says that these numbers multiply to equal 120.  So that first equation is

xy = 120

Our second statement says that they add to -22.  So that second equation is

x + y = -22

Now we need to find the 2 numbers.  We have 2 unknowns, x and y.  That means that we have to have 2 equations.  No more than 2 no less than 2.  Solve the first equation for y.  It doesn't matter which equation you pick and which variable you choose to solve for.  If you do the work correctly, you will get the correct answers either way.  Solving the first equation for y gives you:

y=\frac{120}{x}

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x+\frac{120}{x}=-22

Instead of finding a common denominator, we are going to eliminate x in the denominator altogether.  Do this by multiplying everything by x to get

x^2+120=-22x

Get everything on one side of the equals sign and factor:

x^2+22x+120=0

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x^2+12x+10x+120=0

Use factoring by grouping now.  

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x(x + 12) + 10(x + 12) = 0

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(x + 12)(x + 10) = 0

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If x = -12, then

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y = -10

If x = -10, then

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y = -12.

The combinations of x and y are:

If x = -12, y = 10

If x = -10, y = -12

It doesn't matter which one is which.  They are not asking you to specifically define x and y.  They are asking you to find the numbers, and you did!

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