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3 years ago

Please help my exam is going on please and both question of math

Mathematics

1 answer:

omeli [17]3 years ago

5 0

Step-by-step explanation:

11) PnQ=QnP

or, {1,2,3}n{1,2,3,4,5} = {1,2,3,4,5} n{1,2,3}

or, {1,2,3} = {1,2,3} .Ans

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A football is kicked from the ground and follows the graph of the function y = –t2 + 3t, where y represents height and t represe

vesna_86 [32]

Answer:

The height of the objects are the same after 2 seconds.

Step-by-step explanation:

In order to calculate at which time both objects have the same height we need to find the value of t that makes both equations equal. Therefore:

$-t^2 + 3t = -t + 4\\t^2 - 3t - t + 4 = 0\\t^2 - 4t + 4 = 0\\t_{1,2} = \frac{-(-4) \pm \sqrt{(-4)^2 - 4*1*4}}{2*1} = \frac{4 \pm \sqrt{16 - 16}}{2}\\t_{1,2} = \frac{4}{2} = 2$

The height of the objects are the same after 2 seconds.

8 0

3 years ago

Please write the solution

GrogVix [38]

Answer:

Step-by-step explanation:

that is the answer to the question above

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2 years ago

The formula to find the spring constant, , for a spring with potential energy, , that has been stretched by length, , is shown b

aivan3 [116]

Answer:

the potential energy of the spring

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2 years ago

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Truck brakes can fail if they get too hot. In some mountainous areas, ramps of loose gravel are constructed to stop runaway truc

pickupchik [31]

Kinetic engery = -1/2mv^2

Work = Fd

Combine:

-1/2mv^2 - Fd = 0

-1/2mv^2 = (0.30*15000*9.81*cos(6))d = 0

Multiply both sides by 2:

v^2 = 2d(0.30*9.81*cos(6))

Solve for d:

d=v^2 / 2(0.30*9.81*cos96))

v = speed:

d = 35^2 / 2*0.30 * 9.81 * cos(6)

d = 1225 / 5.85376

d = 209.27 meters. Round answer as needed.

7 0

3 years ago

Each statement describes a transformation of the graph of y = x2. Which statement correctly describes the graph of y = (x + 4)2

alina1380 [7]

Vertex Form: $y=(x-h)^2+k$ , with (h,k) as the vertex.

So the new equation is in vertex form. And looking at this equation, we see the vertex as (-4,-7) (Remember that y = (x + 4)^2 - 7 can be also written as y = (x - (-4))^2 - 7).

Since negative x-coordinates go to the left on the x-axis and negative y-coordinates go down on the y-axis, your answer is going to be C. It is the graph of y = x^2 translated 7 units down and 4 units to the left.

6 0

3 years ago

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Please help my exam is going on please and both question of math​

Please help my exam is going on please and both question of math