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3 years ago

DUE IN A HOUR!!!!!!!!!!

Mathematics

1 answer:

viva [34]3 years ago

5 0

Answer:

y=1/4x+7/4

Step-by-step explanation:

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The height of a triangle is 4 m less than its base. The area of the triangle is 48 m^2.

masya89 [10]

Answer:

Step-by-step explanation:

Let x = base measurement; then height = (x-4).

A = ½•base•height 48 = ½x(x-4

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3 years ago

How to I find this?<br><br> What percent of 60 is 42?

Tpy6a [65]

So let's put it this way-
N% x 60 = 42
You want to isolate the variable
42/60 = N%
42/60 is .7 which is 70%
Hope this helps :)

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3 years ago

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HELP HELP 100 POINTS!! Paola was given the equation y= -x + 3. Which of following is an equivalent representation of the equatio

cluponka [151]

Answer:

To answer this question, there needs to be choices provided since the description you provided states "which of the following".

Step-by-step explanation:

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3 years ago

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Could someone help me rnnn?

GuDViN [60]

Answer:

vertex = (0, -4)

equation of the parabola: $y=3x^2-4$

Step-by-step explanation:

Given:

y-intercept of parabola: -4
parabola passes through points: (-2, 8) and (1, -1)

Vertex form of a parabola: $y=a(x-h)^2+k$

(where (h, k) is the vertex and $a$ is some constant)

Substitute point (0, -4) into the equation:

$\begin{aligned}\textsf{At}\:(0,-4) \implies a(0-h)^2+k &=-4\\ah^2+k &=-4\end{aligned}$

Substitute point (-2, 8) and $ah^2+k=-4$ into the equation:

$\begin{aligned}\textsf{At}\:(-2,8) \implies a(-2-h)^2+k &=8\\a(4+4h+h^2)+k &=8\\4a+4ah+ah^2+k &=8\\\implies 4a+4ah-4&=8\\4a(1+h)&=12\\a(1+h)&=3\end{aligned}$

Substitute point (1, -1) and $ah^2+k=-4$ into the equation:

$\begin{aligned}\textsf{At}\:(1.-1) \implies a(1-h)^2+k &=-1\\a(1-2h+h^2)+k &=-1\\a-2ah+ah^2+k &=-1\\\implies a-2ah-4&=-1\\a(1-2h)&=3\end{aligned}$

Equate to find h:

$\begin{aligned}\implies a(1+h) &=a(1-2h)\\1+h &=1-2h\\3h &=0\\h &=0\end{aligned}$

Substitute found value of h into one of the equations to find a:

$\begin{aligned}\implies a(1+0) &=3\\a &=3\end{aligned}$

Substitute found values of h and a to find k:

$\begin{aligned}\implies ah^2+k&=-4\\(3)(0)^2+k &=-4\\k &=-4\end{aligned}$

Therefore, the equation of the parabola in vertex form is:

$\implies y=3(x-0)^2-4=3x^2-4$

So the vertex of the parabola is (0, -4)

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2 years ago

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Please help!!! Math 10 points!

zheka24 [161]

Answer:

First Blank: 20 photos

Second Blank: 6 minutes

Third Blank: 45 Photos

Fourth Blank: 10 minutes.

Step-by-step explanation:

4*5=20 Photos

30/5=6 Minutes

9*5=45 Photos

50/5=10 Minutes

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3 years ago

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