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agasfer [191]
3 years ago
11

What number should be added to the expression x^2+2x to change it into a perfect square trinomial?

Mathematics
1 answer:
sweet [91]3 years ago
6 0
To make x^2 + 2x a perfect square we need to add the term { 2 / (2*1) }^2

which equals 1.

Add 1 to both sides: x^2 + 2x = 8

add 1 to both sides: x^2 + 2x + 1 = 8 + 1 (x + 1)^2 = 9

Take square root on both sides: x + 1 = +/- 3 x = +3 - 1 or x = -3 - 1 x = 2 or x = -4
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4 0
4 years ago
Given: m∠AKB = 25°
dexar [7]

Answer:

V = 255.98189 pi

SA = 172.64114π

Step-by-step explanation:

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<em>I'm leaving it like this to get a more accurate number</em>

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plugging everything in we get:

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which is about <u>255.98189 pi</u>

Now for surface area

(this is the moment I realize symbols exist)

SA = πr(r+√h²+r²)

plugging everything in we have

π(25tan(12.5))((25tan(12.5)+√625+(25tan(12.5))^2)

<em>I know it looks like a lot but that's mainly because I left the radius as 25tan(12.5)</em>

The Surface Area is about <u>172.64114π</u>

8 0
3 years ago
Tickets to the school play cost $4.50 for adults and $3.00 for students. One night 325 tickets where sold and 1140 was collected
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your equation is now...
7.50x=1140
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3 years ago
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