3 years ago

Write an equation in point-slope form of the line that passes through (-1, – 4) with slope -2.

Mathematics

1 answer:

Rom4ik [11]3 years ago

4 0

Y+4=-2(x+1)

This is the point slope form (y-y1) =m(x-x1)

I hope it will helped!

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Simplify 2x^2+6x-7x+8-3x^2+1

Doss [256]

$(((((2*(x^2))+6x)-7x)+8)-3x^2)+1 \\ \\ ((((2x^2 + 6x) - 7x) + 8) - 3x^2) + 1 \\ \\ we \ would \ then \ (pull \ out) \ like \ terms. \\ \\ -x^2 - x + 9 = -1 * (x^2 + x - 9) \\ \\ \left[\begin{array}{ccc} -9 + 1 = -8 \\
 -3 + 3 = 0 \\
 -1 + 9 = 8 \\
\end{array}\right] \\ \\ Your \ answer: \boxed{\boxed{\bf{ -x^2 - x + 9
}}}$

I hope this helps you!

3 0

3 years ago

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A retailer who sells backpacks estimates that by selling them for x dollars each, she will be able to sell 100−x backpacks each

zvonat [6]

Answer:

x = 50

R = $2500

Step-by-step explanation:

Given in the question a quadratic equation,

−x² + 100x

To find the selling price, x, which will give highest revenue, y, we will find maximum value of parabola curve −x² + 100x

The value of -b/2a tells you the value x of the vertex of the function

−x² + 100x

here a = -1

b = 100

Selling price = -(100)/2(-1)

= 50

R = −(50)² + 100(50)

= 2500

8 0

3 years ago

Sarah received a gift in a rectangular box with a volume of 240 in3. If the base of the box was 20 in2, how tall was the box?

Murrr4er [49]

V = l * w * h
240 = 20* h
divide both sides by 20
12 = h
height = 12 inches

8 0

2 years ago

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Find the y-intercept of the line who's equation is Y = 3.5 x- 0.4.

agasfer [191]

$\sf y=mx+b$

m is the slope
b is the y-intercept

so that means that the y-intercept of

$\sf y=3.5x + .4$

is $\sf .4$

$\bf{\huge{\boxed{y-intercept = .4}}}$

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2 years ago

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How to simplify this

Afina-wow [57]

Hello,

the answer will be the last one
\

hope this help

4 0

3 years ago