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3 years ago

Is this right or wrong ?

Mathematics

1 answer:

Otrada [13]3 years ago

6 0

Answer:

$(3x - 2)(4x + 6) = 12 {x}^{2} + 18x - 8x + - 12 \\ = 12 {x}^{2} + 10x - 12$

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I'll give u a kith pls help

lord [1]

ANSWER:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

Point Form:

(−2,−16)

Equation Form:

x= −2, y= −16

8 0

3 years ago

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2. The path of a high diver is given by y = + (2x2 – 9x – 56), where y is the height of the diver

timofeeve [1]

Answer:

The diver will be 8 feet from the end of the board when he hits the water.

Step-by-step explanation:

The diver hits the water when y = 0.

To find the distance, we have to find the values of x when y = 0.

Solving a quadratic equation:

Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = (x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this problem, we have that:

$y = 2x^{2} - 9x - 56$

$2x^{2} - 9x - 56 = 0$

$a = 2, b = -9, c = -56$

Then

$\bigtriangleup = b^{2} - 4ac = (-9)^{2} - 4*2(-56) = 529$

$x_{1} = \frac{-(-9) + \sqrt{529}}{2*2} = 8$

$x_{2} = \frac{-(-9) - \sqrt{529}}{2*2} = -3.5$

It is a horizontal distance, so the answer is a positive value.

The diver will be 8 feet from the end of the board when he hits the water.

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3 years ago

Write the product in its simplest form<br>-3y.3y4<br>Enter the correct answer.

Sauron [17]

Answer:

$\large\boxed{-9y^5}$

Step-by-step explanation:

$-3y\cdot3y^4=(-3\cdot3)(y\cdot y^4)\qquad\text{use}\ a^n\cdot a^m=a^{n+m}\\\\=-9y^{1+4}=-9y^5$

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3 years ago

Candita uses 1 of an ounce of green paint each time she draws a green line on her painting. She draws a total of 7 green

omeli [17]

(1 + 1 + 1 + 1 + 1 + 1 + 1 ) and ( $\frac{1}{2} + \frac{1}{2} + \frac{1}{2} +\frac{2}{2}$ ) represents the amount of green paint that Candita used drawing green lines on the painting.

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3 years ago

Heyyyyyyyyyy kinda need help asap sooooooo plz :)

ss7ja [257]

Answer:

A, B, C, and D, all options are correct.

A is correct because,

∠2 and ∠3 are corresponding angles.

B is correct because,

∠5 and ∠7 are corresponding angles.

C is correct because,

∠2 and ∠4 are corresponding angles.

D is correct because,

∠5 and ∠6 are alternate interior angles.

Note,

If two lines parallel, then

Corresponding angles are equal.
Alternate interior angles are equal.

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2 years ago

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