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3 years ago

Please answer!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

2 answers:

mezya [45]3 years ago

4 0

Answer:

Step-by-step explanation:

You have 2 5 12 13 right triangles.

x = 2 * 5

x = 10

Pepsi [2]3 years ago

3 0

Answer:

D. $x=10$

Step-by-step explanation:

You can use the Pythagorean Theorem, $a^2+b^2=c^2$ , where a and b are the legs and c is the hypotenuse.

$12^2+b^2=13^2\\144+b^2=169$

Subtract 144 from both sides

$b^2=25$

Square root both sides

$b=5$

$2b=x\\b=5\\x=10$

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3 years ago

What is the mode of the following numbers? 8,1,2,6, 1,4

tatiyna

Answer:

Step-by-step explanation:

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3 years ago

Read 2 more answers

Please solve y=x^2-6x-5 by factoring and by using the quadratic formula with work attached

Lynna [10]

Factoring:

This equation cannot be factored because its roots are irrational (as shown by solving with the quadratic formula). Also, to factor a quadratic equation, you need to find a pair of numbers whose product is equal to the c term (-5) and whose sum is equal to the b term (-6). There is no pair of numbers which satisfies this, further showing that the equation cannot be factored.

Quadratic Formula:

The quadratic formula is x= $\frac{-b ± \sqrt{b^{2}-4ac } }{2a}$ .

First, you need to find the a, b and c terms of your equation. They are 1, -6, and -5 respectively.

Now, you must plug in to the equation and solve for x. You must do so twice, once with a plus sign in the numerator and once with a minus.

$\frac{6 ± \sqrt{(-6)^{2}-4(1)(-5) } }{2(1)} \\\frac{6 ± \sqrt{36+20} }{2} \\\frac{6 ± \sqrt{56} }{2} \\\ \frac{6 ± 2\sqrt{14} }{2} \\3+\sqrt{14} \\3-\sqrt{14}$

The answers are 3+√14 and 3-√14.

Hope this helps!!

3 0

3 years ago