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3 years ago

12 + z = 15 Does anyone know thisplease

Mathematics

1 answer:

belka [17]3 years ago

3 0

Answer:

Step-by-step explanation:

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PLEASE HELP ASAP WILL GIVE BRAINLIEST TO WHOEVER ANSWERS FIRST!!Which of the following is the most direct first step in solving

jeka57 [31]

Answer:

idek

Step-by-step explanation:

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3 years ago

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What numbers are zeros of g(x) = x^2 - 2x - 4? take your time if you need to!

ipn [44]

Answer:

$x = 1 + \sqrt5, x = 1 - \sqrt5$

Step-by-step explanation:

Hello!

We can solve the quadratic by using the quadratic formula.

Standard form of a quadratic: $ax^2 + bx + c = 0$

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

Given our Equation: $g(x) = x^2 - 2x - 4$

a = 1
b = -2
c = -4

Plug the values into the equation and solve.

<h3>Solve</h3>

$x = \frac{-b\pm\sqrt{b^2 - 4ac}}{2a}$
$x = \frac{-(-2)\pm\sqrt{(-2)^2 - 4(1)(-4)}}{2(1)}$
$x = \frac{2\pm\sqrt{4 +16}}{2}$
$x = \frac{2\pm\sqrt{20}}{2}$
$x = \frac{2\pm\sqrt{4 * 5}}{2}$
$x = \frac{2\pm(\sqrt4 * \sqrt5)}{2}$
$x = \frac{2\pm2\sqrt5}{2}$
$x = 1 + \sqrt5, x = 1 - \sqrt5$

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2 years ago

80% is 50 of what number

Nostrana [21]

Answer:

62.5

Step-by-step explanation:

Let unknown number be represented as X

80/100 ×X=50

80X/100=50 cross multiply

80X=5000 divide both side by 80

X=62.5

The number is 62.5

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3 years ago

- K2 - (2k –5n) + 9n; k= -1 and n= - 3

NNADVOKAT [17]

Answer:

$-41$

Step-by-step explanation:

Given:

$-k^2 -(2k -5n) +9n ; k = -1 \space \text{and} \space n = -3$

$-(-1)^2 -(2(-1) -5(-3)) +9(-3) \\ -(-1)^2 -(-2+15) +9(-3) \\ -(-1)^2 -(13) +9(-3) \\ -(1) -13 +9(-3) \\ -1 -13 -27 \\ -41$

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3 years ago

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Find an equation of the horizontal line passing through the point (-5, 4)

Tema [17]

Answer:

y=4

Step-by-step explanation:

Without x in an linear equation, it is just a horizontal line. This equation goes through the points (-5,4).

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3 years ago