3 years ago

Anyone know this??? Pls help now.

Mathematics

1 answer:

Brut [27]3 years ago

4 0

x,y = (3,-7)

x-5, 7+4

3-5 = -2

-7+4=-3

the answer is (-2,-3)

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I need to an explanation about this formula.

sergeinik [125]

I would answer but i can not see what it says.... Sorry

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3 years ago

Suppose a flare is shot from the top of a 120 foot building at a speed of 160 feet per second. The equation h = ?16t + 160t + 12

insens350 [35]

Answer:

The time taken for the flare to hit the ground is approximately 10.7 seconds.

Step-by-step explanation:

Given : Suppose a flare is shot from the top of a 120 foot building at a speed of 160 feet per second. The equation $h =- 16t^2+ 160t + 120$ models the h height at t seconds of the flare.

To find : How long will it take for the flare to hit the ground?

Solution :

The equation $h =- 16t^2+ 160t + 120$ models the h height at t seconds of the flare.

The flare to hit the ground when h=0.

Substitute in the equation,

$-16t^2+ 160t + 120=0$

Applying quadratic formula, $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Where, a=-16, b=160 and c=120

$x=\frac{-160\pm\sqrt{160^2-4(-16)(120)}}{2(-16)}$

$x=\frac{-160\pm\sqrt{33280}}{-32}$

$x=\frac{-160\pm 182.42}{-32}$

$x=\frac{-160+182.42}{-32},\frac{-160-182.42}{-32}$

$x=−0.70,10.70$

Reject the negative value.

Therefore, the time taken for the flare to hit the ground is approximately 10.7 seconds.

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3 years ago

a shop sells 1 chocolate for $1 each,you can exchange 3 wrappers for 1 chocolate.if you have $15 how many chocolates can you get

frutty [35]

You can only get 5 c chocolates if you have that many.

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3 years ago

Using the quadratic formula to solve x^2=5-x what are the values of x?

kenny6666 [7]

A
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So x=(-1 +/- sqrt(1^2+4*1*5))/2
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3 years ago

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