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Aleksandr-060686 [28]
4 years ago
10

60 inches long she cuts off 40% she decides 75% of the peice she cut off. how much of the ribbon does kelly end up using in her

project

Mathematics
1 answer:
kipiarov [429]4 years ago
4 0
Hey there!

For this problem and problems like these, it's easier just to draw everything out. Once you get the hang of envisioning these drawings in your mind, you won't have to, but when you're starting out on problems like these, it's best to draw yourself little representations of the situation and label everything accordingly. 

I have attached such a diagram. Basically, I calculated 40% of 60 inches, then calculated 75% of 40% of 60 inches. Hope my drawing helps you see the situation a little better. 

Keep in mind that in order to multiply a whole number by a percentage, you need to convert it to a decimal. As an example, 40% will be converted to 0.40, or just 0.4. 

Hope this helped you out!

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3 years ago
Michaels, Inc., purchased a machine for $75,000. The machine has a useful life of five years and no salvage value. Straight-line
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In a triangle, two angles have measures of 45º and 85º. What is the measure of the third angle in this triangle?
schepotkina [342]
To figure out one measure of a triangle, we use A2+B2=C2
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7 0
3 years ago
(2x+y=-2<br> 5x + 3y = -8<br> Solve by elimination
Effectus [21]

Answer:

y = -6, x =2

Step-by-step explanation:

To solve by elimination, you have to line both equations up together. Then, you multiply both equations until one variable is removed.

2x+y = -2

5x + 3y = - 8

There are many different ways to solve an elimination problem, but generally you should look for the simplest route. Here, I would multiply the top equation by -3.

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5x +3y = -8

Imagine you are adding the two equations together. You end up with

-x = -2

Then solve for x. In this situation, it is fairly simple. Take out a factor of -1.

x = 2

Finally, choose one of your beginning equations and plug your new-found x value back into the equation.

2(2) +y = -2

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y = -6

8 0
3 years ago
What is the value of the expression when a is 5 and b is 3 4a^2-5b^2
docker41 [41]
So that gives you
4×5^2-5×3^2
First you have to do the exponents
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Now you have 4×25-5×9
4×25=100
5×9=45
100-45=55
55 is the answer.
3 0
3 years ago
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