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3 years ago

HEEEEEEELLLLLLPPPPPPPP!!!!!!!!!!

Mathematics

1 answer:

SIZIF [17.4K]3 years ago

5 0

Answer:

C. 17 - 12 = d + 12 - 12

Step-by-step explanation:

You need to get d by itself and in order to do that you need to subtract 12

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Select the two values of x that are roots of this equation.<br>x + 2x - 6 = 0

VLD [36.1K]

For this case we must solve the following quadratic equation:

$x ^ 2 + 2x-6 = 0$

Where:

$a = 1\\b = 2\\c = -6$

The solution is given by:

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

Substituting:

$x = \frac {-2 \pm \sqrt {2 ^ 2-4 (1) (- 6)}} {2 (1)}\\x = \frac {-2 \pm \sqrt {4 + 24}} {2}\\x = \frac {-2 \pm \sqrt {28}} {2}\\x = \frac {-2 \pm \sqrt {2 ^ 2 * 7}} {2}\\x = \frac {-2 \pm2 \sqrt {7}} {2}\\x = -1 \pm \sqrt {7}$

Thus, we have two roots:

$x_ {1} = - 1+ \sqrt {7}\\x_ {2} = - 1- \sqrt {7}$

ANswer:

$x_ {1} = - 1+ \sqrt {7}\\x_ {2} = - 1- \sqrt {7}$

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3 years ago

1+1 (FYI It's a Riddle)

lubasha [3.4K]

Answer:

Step-by-step explanation:

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2 years ago

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Emma is going camping. each triangle on her tent is 5 feet tall. the square base 4 feet wide. what is the surface area of her te

Virty [35]

10ft squared

I think because 5 times 4 is 20 so 20 divided by 2 is 10 dividing braces of triangle

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3 years ago

Change 26 out of 40 to a percentage

GenaCL600 [577]

Answer:

Step-by-step explanation:

26 divided by 40 then multiply by a hundred

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3 years ago

A square shed has a floor area of 156.25m square. what is the length of the diagonal

slava [35]

Square root 156.25 to get the values of the sides of the square. You will get 12.5m for each side.

Now that you have the side values, use Pythagoras' Theorem to solve for the diagonal. Let's call the diagonal x,

c^2 = a^2 + b^2
x^2 = 12.5^2 + 12.5^2
= 312.5

Square root both sides to get x,

x = 17.68m (2 d.p)

HOPE THIS HELPED! Ask me if there is anything you don't understand from this working :D

7 0

3 years ago