A rectangular blankets perimeter is 210 inches. If the long sides of the blanket measure 60 inches what is the length of the shorter side of the blanket
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I believe the answer is 45
4x-7>17 what's the problem and answe of solution please
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The interior angles in a regular polygon are 140 degrees. How many sides has the polygon? it could be something to do with s=(n-2) x 180
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Yes, it certainly could ! When you first noticed that formula in a book, or when it was given to you in class, did you also notice or learn what it means ?
It means "The sum of all the interior angles in a polygon" = (number of sides - 2) x 180.
Triangle ........ 3 sides ... (3 - 2) = 1 x 180 = 180° degrees ... 60° each if regular Quadrilateral . 4 sides ... (4 - 2) = 2 x 180 = 360° degrees ... 90° each if regular Pentagon ...... 5 sides ... (5 - 2) = 3 x 180 = 540° degrees ... 108° each if regular Hexagon ....... 6 sides ... (6 - 2) = 4 x 180 = 720° degrees ... 120° each if regular Sevenagon ... 7 sides ... (7 - 2) = 5 x 180 = 900° degrees ... 128 and 4/7 each if regular Octagon ........ 8 sides ... (8 - 2) = 6 x 180 = 1080° degrees ... 135° each if regular Nonagon ....... 9 sides ... (9 - 2) = 7 x 180 = 1260° degrees ... 140° each if regular
Show how to apply the order of operation rules as you simplify the following expression.|-5| – 45 ÷ 3
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There arnt really any steps |-5|-45/3=-10
7a – b = 15a, for a does anyone have a clue what this is
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welp its kinda easy you are trying to get b so 7a-7a 15a-7a equals 8a
Im new here, Could anyone help me
How to combine fraction
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If two (or more) fractions have the same number as their denominator, you can just go ahead and add their numerators, without changing the denominator. For example:
and has the same number (2) as their denominator. So we will add their numerators, without changing the denominator.
So we added the numerators (1 + 4 = 5) and kept the denominator same (2) and we got (
This was the case where the fractions' denominator was same. What if it's not ?
If their denominator isn't equal, we're gonna have to equalize them ourself. How to do that ?
Let's show it with an example :
and do no have the same number as their denominator. To be able to add them, we have to equalize their denominators.
's denominator is 2 and 's is 4
What can we do to equalize them ? Well, 4 is two times 2 ( ) So we cane multiply the denominator of (which is 2) with 2 , to equal it to 's denominator (which is 4).
But, there is a catch here. When multiplying a fraction's denominator before adding it to another, you should make sure that you're preserving its ratio. What does that mean ?
Let's take the number
(1) if we multiply only its numerator with a number (let it be 3)
You got a new fraction with a different ratio than . And it is also equal to 2, but isn't equal to 2.
(2) if we multiply only its denominator with a number (let it be 3 again)
You got a new fraction again, with a different ration than .
How can we know that ? Well, if you simplify these two numbers to the simplest number, you'll get a different fraction or integer. Let's do so.
So the simplified form of in the fraction form is
And the simplest form of as a fraction is , which is not equal to
So what to do, to preserve the ratio ? Simle. We'll multiply also the numerator with the same number we're going to multiply the denominator with.
Let's get back to our example.
Adding and
We were going to multiply 's denominator with 2. Now that we know, the ratio must not change, we'll also multiply the numerator with 2.
Now we've got a number which has the same denominator as
We can add them now,
I hope this was clear, if not please ask and I'll try to explain.