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3 years ago

7

Need help with a algebra question thanks!

1 answer:

otez555 [7]3 years ago

8 0

It's the first one. If you need any help with graphs, I suggest going on desmos.com

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A contractor estimates $2,400 to build a deck to a customer’s specifications, How much would it cost to build five similar decks

Bumek [7]

5*2400=$12,000 is the total costs for 5 decks costing $2,400 each.

3 0

3 years ago

What would be A' after I dilation using a scale factor of 1/2

noname [10]

Answer:

A) (-5,0)

Step-by-step explanation:

B) (-2, 4)

C) (-2, -3)

Hope this helped!

8 0

3 years ago

What is the equation of the quadratic graph with a focus of (3, 1) and a directrix of y = 5?

telo118 [61]

Answer:

$f(x)=-\frac{1}{8}(x-3)^2+3$

Step-by-step explanation:

We want to find the equation of the parabola with a focus of $(3,1)$ and directrix $y=5$ .

Considering the directrix, the quadratic graph must open downwards.

The equation of this parabola is given by the formula,

$(x-h)^2=4p(y-k)$ , where $(h,k)$ is the vertex of the parabola.

The axis of this parabola meets the directrix at $(3,5)$ .

Since the vertex is the midpoint of the focus and the point of intersection of the axis of the parabola and the directrix,

$h=\frac{3+3}{2}=3$ and $k=\frac{5+1}{2}=3$ .

The equation of the parabola now becomes,

$(x-3)^2=4p(y-3)$ .

Also $|p|$ is the distance between the vertex and the directrix.

$|p|=2$

This implies that $p=-2\:or\:2$ .

Since the parabola turns downwards,

$p=-2$ .

Our equation now becomes,

$(x-3)^2=4(-2)(y-3)$ .

$(x-3)^2=-8(y-3)$ .

We make y the subject to get,

$y=-\frac{1}{8}(x-3)^2+3)$ .

This is the same as

$f(x)=-\frac{1}{8}(x-3)^2+3)$ .

4 0

3 years ago

Kailee had $94. She paid $32 for her guitar lessons. Then she earned $14 raking leaves. How much money does Kailee have now?

Monica [59]

$94 - $32= $62 + $14= $76. :)

7 0

3 years ago

Read 2 more answers

Use the given conditions to write an equation in point-slope form. Keep parenthesis in point-slope form. slope = 7, passing thro

Mekhanik [1.2K]

Answer:

Step-by-step explanation:

y + 3 = 7(x - 1)

y + 3 = 7x - 7

y = 7x - 10

5 0

3 years ago