2 years ago

–3 ÷ 1 = –3 What property is shown in the equation?

2 answers:

5 0

It is B identity property of division. Because you are dividing by one and that is a part of what the identity property of division.

julia-pushkina [17]2 years ago

3 0

The answer is b. identity property of division

The property states that anything divided by 1 is equal to its self

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PLS HELP! What are the solutions of 4x^2-8x+5=0

Shkiper50 [21]

x = -1/2 = -0.500
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EITHER ONE WORKS

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3 years ago

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vazorg [7]

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lyudmila [28]

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Step-by-step explanation:

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2 years ago

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Solve for R. 3 + 3r > 9

Nostrana [21]

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Step-by-step explanation:

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7 0

3 years ago

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

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

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

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

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

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

2 years ago