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jok3333 [9.3K]
3 years ago
13

(x - 4)(x + 5) need help asap​

Mathematics
2 answers:
sergij07 [2.7K]3 years ago
8 0

Answer:

x^2+x-20

Step-by-step explanation:

(x-4)(x+5)= \\\\(x)(x)+(5)(x)+(-4)(x)+(-4)(5)= \\\\x^2+5x-4x-20= \\\\x^2+x-20

Hope this helps!

mash [69]3 years ago
7 0
X (squared) +x−20

(x+−4)(x+5)=(x)(x)+(x)(5)+(−4)(x)+(−4)(5)=x(squared)+5x−4x−20=x2+x−20
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Answer:

This is an equilateral triangle, meaning that all sides and all angles are equal, as shown through the three equal side lengths, so all you have to do is find what makes all three angles the same number!

A triangle has 180 degrees, and this one has 3 equal angles because it has 3 equal sides, so 180/3 is 60 degrees!

So C. 60 degrees is your answer!!

Hope this helps!

Step-by-step explanation:


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Step-by-step explanation:

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tankabanditka [31]

Answer:

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Step-by-step explanation:

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BC =24

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Required

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AB = \frac{7}{\sin(B)}

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Considering the cosine of angle B, we have:

\cos(B) = \frac{Adjacent}{Hypotenuse}

\cos(B) = \frac{24}{AB}

Make AB the subject

AB = \frac{24}{\cos(B)}

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\cos(A) = \frac{Adjacent}{Hypotenuse}

\cos(A) = \frac{7}{AB}

Make AB the subject

AB = \frac{7}{\cos(A)}

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<em>This has been shown in (c) above</em>

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