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3 years ago

I NEED HELP ON THIS FAST!!

Mathematics

2 answers:

marysya [2.9K]3 years ago

5 0

Answer:

21,120

Step-by-step explanation:

5,280x4=21,120

rewona [7]3 years ago

3 0

Answer:

21,120 ft

Step-by-step explanation:

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2 years ago

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BigorU [14]

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2 years ago

Read 2 more answers

HELP!

maksim [4K]

Part A

$4x^2 -7x-15=0\\\\(4x+5)(x-3)=0\\\\x=-\frac{5}{4}, 3$

So, the x-intercepts are $\boxed{\left(-\frac{5}{4}, 0 \right), (3,0)}$

Part B

The vertex will be a minimum because the coefficient of $x^2$ is positive.

The x-coordinate of the vertex is $x=-\frac{-7}{2(4)}=\frac{7}{8}$

Substituting this back into the function, we get $f\left(\frac{7}{8} \right)=4\left(\frac{7}{8} \right)^2 -7\left(\frac{7}{8} \right)^2 -15=-\frac{289}{16}$

So, the coordinates of the vertex are $\boxed{\left(\frac{7}{8}, -\frac{289}{16} \right)}$

Part C

Plot the vertex and the x-intercepts and draw a parabola that passes through these three points.

The graph is shown in the attached image.

7 0

1 year ago

I NEED HELP ON THIS FAST!!​

I NEED HELP ON THIS FAST!!