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3 years ago

13

Choose the equation of the horizontal line that passes through the point (-8 -7)

1 answer:

joja [24]3 years ago

4 0

The equation of a horizontal line is $y=$ . So all you have to do it plug in the y-value to that, so it would be:

$y=-7$

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The height of the tunnel at the center is 35ft, and the vertical clearance must be 21 ft at a point of 8ft from the center. Find

Zinaida [17]

Answer:

y=-0.215x^2+35

Step by Step:

Let, $h=0$ , $k=35$ , $x=8$ , $y=21$

We know that, the general equation of the parabola.

$y-k = a(x-h)^2$

$\Rightarrow y=a(x-h)^2+k .........(i)$

Substitute the value of $h, k, x, y$ in equation $(i)$ and find the value of $a.$

$21=a(8-0)^2+35$

$\Rightarrow 21=a\times 8^2+35$

$\Rightarrow 21=64a+35$

$\Rightarrow 64a=21-35$

$\Rightarrow 64a=-14$

$\Rightarrow a=\frac{-14}{65}$

$\Rightarrow a=-0.215$

Hence, the equation of the parabola is:

$y=-0.215x^2+35$

8 0

3 years ago

1. Margaret sold shoes for $200. Margaret increases

Alika [10]

Answer:

$400

Step-by-step explanation:

100% of 200 is 200 so combine them to get 400.

3 0

3 years ago

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-<br> Which expression is equivalent to 3x+10-x+12

stiv31 [10]

Answer:

Step-by-step explanation:

3x-x+= 2x

10+ 12= 22

Answer - 2x+22

5 0

2 years ago

What is the answer to #3?

FrozenT [24]

I think it’s 2 but I’m not sure

5 0

3 years ago

The Jennings family paid $371.40 for the year for their cable service. If their payments were the same each month, how much was

liberstina [14]

Answer:

$30.95

Step-by-step explanation:

There are 12 months in a year. $371.40 divided by 12 gives us $30.95.

3 0

3 years ago

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