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4 years ago

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A survey found that 28% of 8th graders have an iPhone. Using that information,predict how many of 358 7th graders have an iPhone

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1 answer:

Snezhnost [94]4 years ago

5 0

28% x 358 = 28/100 x 358 =<u> 100 </u>7th graders have iphone

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3 years ago

Simplify this equation <br> Thanks a lot!!!

den301095 [7]

Answer:

-1

Step-by-step explanation:

We need to simplify the given expression . The given expression is ,

$\rm\implies ( 2 \sqrt6 +5)^{2n-1} ( 2\sqrt6 - 5)^{2n-1}$

Here we can see that the power of the both exponent is same that is (2n+1) . Recall the property of exponents ,

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This can be written as ,

$\rm\implies\{( 2 \sqrt6 +5) ( 2\sqrt6 - 5)\}^{2n-1}$

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Subtracting the numbers inside the brackets ,

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$\rm\implies\boxed{\quad \red{ -1 }\quad }$

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4 0

3 years ago

Find the area of the triangle defined by the coordinates (-3, -4), (-7, 0), and (-3, 4).

mr Goodwill [35]

The area of a Triangle is 1/2BH (B=Base length, H=Height)
When looking at the points, we can figure out the following:

The distance between the two points at the base is 8 (to get from -4 to 4 you must add 8) and the height is 4 (to get from -4 to 0 as well as 0 to 4, the distance is 4).

Now we plug in our values:
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Therefore, your answer is 16 units squared.

I hope this Helps!
-Sinnamin

3 0

3 years ago