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patriot [66]
3 years ago
5

The point (-8,0) in the x-axis

Mathematics
1 answer:
Alenkasestr [34]3 years ago
4 0
8. Is the answer! Hope this helps
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Wright a variable expression for the word phrase, "the product of a number z and 7" A: 7 - z
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Product means to multiply so, C
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The lengths of the sides of a triangle are 2a 3, a – 2, and 3a. Write a simplified expression for the perimeter of the triangle.
ipn [44]

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2a+3+a-2+3a

6a+1

Step-by-step explanation:

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What is the result when the number 87 is increased by 3.9%?
RoseWind [281]

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What is the factored form of the expression?<br><br> d^2 = 36d + 324
Veseljchak [2.6K]

Answer:

(x-43.45)(x+7.45)=0

Step-by-step explanation:

We have the quadratic equation d^{2}=36d+324  i.e. d^{2}-36d-324=0

As, the roots of the quadratic equation ax^{2}+bx+c=0 are given by x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}.

So, from the given equation, we have,

a = 1, b = -36 , c = -324.

Substituting the values in x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}, we get,

x=\frac{36\pm \sqrt{(-36)^{2}-4\times 1\times (-324)}}{2\times 1}

i.e. x=\frac{36\pm \sqrt{1296+1296}}{2}

i.e. x=\frac{36\pm \sqrt{2592}}{2}

i.e. x=\frac{36\pm 50.9}{2}

i.e. x=\frac{36+50.9}{2}  and x=\frac{36-50.9}{2}

i.e. x=\frac{86.9}{2}  and x=\frac{-14.9}{2}

i.e. x = 43.45 and x = -7.45

Thus, the roots of the equation are 43.45 and -7.45.

Hence, the factored form of the given expression will be (x-43.45)(x+7.45)=0

3 0
3 years ago
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