3 years ago

HELP!!! SOLVE USING SUBSTITUTION OR ELIMINATION.

Mathematics

1 answer:

Bezzdna [24]3 years ago

8 0

Search it up on the internet <3

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The constants are 2, -10, and 5

the variables are x and y

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If x^2=20 what is the value of x will give brainliest for answer

Schach [20]

Answer:

x² - 20 = 0

Using the quadratic formula

$x = \frac{ - b± \sqrt{( {b})^{2} - 4ac } }{2a}$

a = 1 b = 0 c = -20

So we have

$x = \frac{ - 0 ± \sqrt{ {0}^{2} - 4(1)( -20)} }{2(1)} \\ \\ x = \frac{± \sqrt{80} }{2} \\ \\ x = \frac{±4 \sqrt{5} }{2} \\ \\ \\ x = ±2 \sqrt{5} \\ \\ \\ x = 2 \sqrt{5} \: \: \: or \: \: \: x = - 2 \sqrt{5}$

Hope this helps you.

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3 years ago

What is the sum of the interior angles of a rectangle?

Zolol [24]

360 degrees.

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Area: 45. and one side is 8 feet. what is the missing side? (will give brainlist :D)

Bess [88]

Area = length x width
45sqft = 8ft x W
45/8 = W
5.625 ft = W
The missing side is 5.625 feet

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3 years ago