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ddd [48]
3 years ago
11

What value is added to both sides of the equation x2 - 8x = -10 in order to solve by completing the square?

Mathematics
1 answer:
IgorLugansk [536]3 years ago
5 0
X² - 8x = -10

to have a complete square, we must have this format:

a² + 2ab + b²

a² = x²
2ab = -8x ⇒ 2(x)(-4)
b² = -4² = 16

x² - 8x + 16 = -10 + 16
x² - 8x + 16 = +6
(x-4)² - 6 = 0

Both sides must have an additional value of 16.

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X=y-3 4x+2y=2? What is the answer
Margaret [11]

Answer:

y=8/3

Step-by-step explanation:

x=y-3

4x+2y=2

4(y-3)+2y=2

4y-12+2y=2

6y-12=2

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y=16/6=8/3

6 0
3 years ago
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3 years ago
What is the sum of 10 cubed and 25 squared?
White raven [17]
The sum is 1625.

Answer in Words: One thousand and six hundred twenty-five.

The cube of 10 is 1000.

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100 x 10 = 1000 (cube of ten)

The square of 25 is 625.

25 x 25 = 625 (square of 25)

Therefore, 1000 + 625 = 1625

the sum is 1625
3 0
3 years ago
What is the sine value of <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B5%20%5Cpi%20%7D%7B3%7D%20" id="TexFormula1" title=" \fr
vovikov84 [41]
Find the value of sin( \frac{5 \pi }{3} )

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sin( \frac{6}{3} \pi -  \frac{ \pi }{3}  )

sin(2 \pi - \frac{ \pi }{3} )

since sin(π/3) = √3/2

and sin(π-α) = -sinα

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3 0
3 years ago
Find the side length. Round to the nearest tenth if necessary.<br> 15
Rasek [7]

Answer:

x = 39

Step-by-step explanation:

This is pythagoras

x = √36² + 15²

x = √1296 + 225

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x = 39

Hopefully it helps you

Ask if u don't understand

8 0
3 years ago
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