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3 years ago

8

Leah knit a scarf that is 130 centimetres ( cm ) long. Theo knit a scarf that is 4/3 as long Leah's scarf. How long is Theo's sc

arf?

1 answer:

harkovskaia [24]3 years ago

6 0

Answer:

173.33333333333...

Step-by-step explanation:

4/3=1.3333333...

So 130×1.3333333... is 173.3333333...

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Jadas family has completed 30% of a trip. They have traveled 15 miles. How far is the trip

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How many feet are in 9 meters? <br> 1 m = 3.3 ft<br><br><br>9 m = [?] ft

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A ball is thrown upward from ground level. Its height h, in feet, above the ground after t seconds is h-48t -16t^2.

Marat540 [252]

Answer:

36 feet.

Step-by-step explanation:

We have been given that a ball is thrown upward from ground level. Its height h, in feet, above the ground after t seconds is $h(t)=-48t -16t^2$ . We are asked to find the maximum height of the ball.

We can see that our given equation is a downward opening parabola, so its maximum height will be the vertex of the parabola.

To find the maximum height of the ball, we need to find y-coordinate of vertex of parabola.

Let us find x-coordinate of parabola using formula $x=-\frac{b}{2a}$ .

$x=-\frac{-48}{2(-16)}$

$x=-\frac{48}{32}$

$x=-\frac{3}{2}$

So, the x-coordinate of the parabola is $-\frac{3}{2}$ . Now, we will substitute $x=-\frac{3}{2}$ in our given equation to find y-coordinate of parabola.

$h(t)=-48t -16t^2$

$h(-\frac{3}{2})=-48(-\frac{3}{2})-16(-\frac{3}{2})^2$

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2 years ago

Find the line through

Kaylis [27]

Answer:

$(\frac{1}{2},\frac{-1}{2},\frac{1}{2})$

Step-by-step explanation:

We have been given the intersection coordinates:

(7,1,-6) and perpendicular to the line x=-1+t ,y=-2+t and z=-1+t

From the condition of perpendicularity we know:

$(7,1,-6)(x,y,z)$

$\Rightarrow 7x+y-6z=0$

Now, we have given x=-1+t , y=-2+t and z= -1+t

$7(-1+t)+(-2+t)-6(-1+t)=0$

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Now, substituting t in the given coordinates x,y and z we get:

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And $z=-1+\frac{3}{2}=\frac{1}{2}$

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3 years ago

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