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lys-0071 [83]
3 years ago
10

A car is driving with a constant velocity of 3.00 m/s.  After 2.00 minutes, how far has it gone?​

Mathematics
2 answers:
dimulka [17.4K]3 years ago
6 0

Answer:

360 m

Step-by-step explanation:

In order to find the distance we need to multiply the time by the velocity.

v=x/t when we solve for x we get v*t=x so,

2 minutes=2*60 sec=120 sec

3*120=360 m

Ostrovityanka [42]3 years ago
5 0

Answer:

360m

Step-by-step explanation:

3m=1s

2min=120s

3m=1s

.....=120s

120×3

360m

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Martin throws a ball straight up in the air. the equation h(t) = -16t^2 + 40t + 5 gives the height of the ball, in feet, t secon
Lisa [10]

Answer:

2.62 seconds

Step-by-step explanation:

Let

t ----> the time in seconds

h(t) ----> he height of the ball, in feet

we have

h(t)=-16t^2+40t+5

we know that

When the ball hits the ground, the height is equal to zero

so

-16t^2+40t+5=0

The formula to solve a quadratic equation of the form

at^{2} +bt+c=0

is equal to

t=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}

in this problem we have

-16t^2+40t+5=0

so

a=-16\\b=40\\c=5

substitute in the formula

t=\frac{-40\pm\sqrt{40^{2}-4(-16)(5)}} {2(-16)}

t=\frac{-40\pm\sqrt{1,920}} {-32}

t=\frac{-40+\sqrt{1,920}} {-32}=-0.12\ sec

t=\frac{-40-\sqrt{1,920}} {-32}=2.62\ sec

therefore

The solution  is t=2.62 seconds

4 0
3 years ago
Y = x-2<br> What is the y-intercept of this line?
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Answer:

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Step-by-step explanation:

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Step-by-step explanation:

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Step-by-step explanation:

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Factor completely.
Svetllana [295]
To help explain how you get A for the answer:
work backwards
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