3 years ago

MATH, please help! I don’t understand

Mathematics

1 answer:

Westkost [7]3 years ago

4 0

Answer:

The first option is correct

Step-by-step explanation:

Surface area for a cylinder: $2\pi r^2+2\pi rh$

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Step-by-step explanation:

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Step-by-step explanation: I took the following steps to find the answer:

(4 + 32)(15 – 23)

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3 years ago

In simplest radical form, what are the solutions to the quadratic equation 6 = x2 – 10x?

vichka [17]

Answer:

$x = 5+\sqrt{31}\,\, and\,\, x=5-\sqrt{31}$

Step-by-step explanation:

We need to solve the quadratic equation

6 = x^2 -10x

Rearranging we get,

x^2-10x-6=0

Using quadratic formula to solve the quadratic equation

$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

a= 1, b =-10 and c=6

Putting values in the quadratic formula

$x=\frac{-(-10)\pm\sqrt{(-10)^2-4(1)(-6)}}{2(1)}\\x=\frac{10\pm\sqrt{100+24}}{2}\\x=\frac{10\pm\sqrt{124}}{2}\\x=\frac{10\pm\sqrt{2*2*31}}{2}\\x=\frac{10\pm\sqrt{2^2*31}}{2}\\x=\frac{10\pm2\sqrt{31}}{2}\\x = 5\pm\sqrt{31}$

So, $x=5+\sqrt{31}\,\, and\,\, x=5-\sqrt{31}$

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3 years ago

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Anika [276]

The answer is 32 because -45 + 3 = -32 and -39 - 3 = -32

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