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Vinvika [58]
3 years ago
12

Factor each expression: 18x2 - 9x

Mathematics
2 answers:
Marina CMI [18]3 years ago
6 0
18x2 - 9x can be factored into 9x(2x - 1).
Gekata [30.6K]3 years ago
5 0
You first factor the common numbers

18x2-9x = 9x(x-1)
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Sarah already had 45 stamps in her collection and she gets 7 new stamps each month how long will it take before she has 129 stam
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The answer is:  " 12 months " .
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3 years ago
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A rectangle has an area of 240 square meters and a width of 15 meters.
fredd [130]
Area is found by taking the length time width or A=lw

240=L x 15    divide both sides by 15

Length = 16 meters

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3 years ago
Which of the following choices is the standard deviation of the sample shown here
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2 years ago
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PLEASE HELP
irina [24]
Take the longer leg length as x

(x-8)^2+x^2=(x+8)^2 \\ \\ x^2-16x+64+x^2=x^2+16x+64 \\ \\ x^2-32x=0

Use the formular
x={ \frac{-b+ \sqrt{ b^2-4ac}}{2a} } \\ \\ x={ \frac{32+32}{2} } \\ \\ x=32

∴ shorter leg = 32 - 8 = 24ft
longer leg = 32ft
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8 0
3 years ago
se necesita llenar un galon de agua,en 2 litros se tarda 30 minutos.cuantos litros me hacen falta para completar el galon y cual
mariarad [96]

Answer: 1.78 L are needed to complete the gallon and it will take 29.66 min to completely fill it

Step-by-step explanation:

The question in english is:

A gallon of water needs to be filled, in 2 liters it takes 30 minutes. How many liters do I need to complete the gallon and what is the time it takes me to fill it?

We know 1 gallon is equal to 3.78 liters:

1 gal=3.78 L

In addition, we are told you have filled the gallon with 2 L at a rate of \frac{2 L}{30 min}=0.06 L/min.

So, if we want to know how many liters are left to completely fill the gallon, we have to sbstract the 2 L to the total amount of a gallon:

3.78 L-2 L=1.78 L This is the amount you need to complete the gallon

On the other hand, the rate is defined as:

rate=\frac{Liters}{time}

Isolating time:

time=\frac{Liters}{rate}

Then, if we input the 1.78 L we need to fill the gallon we will have the time:

time=\frac{1.78 L}{0.06 L/min}

time=29.66 min This is the time you need to fill the gallon

6 0
3 years ago
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