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4 years ago

HELP ME!! SOMEBODY PLEASE HELP ME

Mathematics

1 answer:

IRISSAK [1]4 years ago

4 0

6^2 = x (x - 9)
x^2 - 9x - 36 = 0
(x -12)(x + 3) = 0
x - 12 = 0; x = 12
x +3 = 0; x = -3

so in this case x = 12 then DC = 12 - 9 = 3

y^2 = 12^2 - 6^2
y^2 = 144 - 36
y^2 = 108
y = 10.4

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3 years ago

Read 2 more answers

For what values of x is x2-36=5x true?<br> 0 -9 and -4<br> O4 and 9<br> O4 and -9<br> o 9 and 4

mars1129 [50]

Answer:

-4 and 9

Step-by-step explanation:

we have

$x^{2} -36=5x$

we know that

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

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

in this problem we have

$x^{2} -36=5x$

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$a=1\\b=-5\\c=-36$

substitute in the formula

$x=\frac{-(-5)(+/-)\sqrt{-5^{2}-4(1)(-36)}} {2(1)}$

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$x=\frac{5(+/-)13} {2}$

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$x=\frac{5(-)13} {2}=-4$

therefore

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3 years ago

Pls help me and I will mark you brainliest.

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Step-by-step explanation:

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3 years ago

What is the total number of pitchers of iced tea that can be made with 24 tea bags?

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3 years ago

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Romashka [77]

Answer:

Step-by-step explanation:

A = Surface area of the Earth = $1.5\times 10^8\ \text{km}^2$

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We need to find the number of people living in each square km of land area.

So, we need to divide the number of people by the land area of the Earth.

$1.5\times 10^8\ \text{km}^2=7.594\times 10^9\ \text{people}$

$\Rightarrow 1\ \text{km}^2=\dfrac{7.594\times 10^9}{1.5\times 10^8}$

$\Rightarrow 1\ \text{km}^2=50.63\approx 51\ \text{people}$

So, 51 people will inhabit each square km of land area.

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3 years ago