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3 years ago

What is this plz help

Mathematics

2 answers:

mars1129 [50]3 years ago

8 0

T=24 hope dis helps :)

zhenek [66]3 years ago

6 0

1/5 t +28=1t+12
1/5t-1t=12-28
4/5t= 16
t= 20

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3 years ago

Find two numbers that up to 158. The greater number is 40 more than the lesser number.

snow_tiger [21]

99 and 59

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3 years ago

A teenager who is 5 feet tall throws an object into the air. The quadratic function LaTeX: f\left(x\right)=-16x^2+64x+5f ( x ) =

tia_tia [17]

Answer:

At approximately x = 0.08 and x = 3.92.

Step-by-step explanation:

The height of the ball is modeled by the function:

$f(x)=-16x^2+64x+5$

Where f(x) is the height after x seconds.

We want to determine the time(s) when the ball is 10 feet in the air.

Therefore, we will set the function equal to 10 and solve for x:

$10=-16x^2+64x+5$

Subtracting 10 from both sides:

$-16x^2+64x-5=0$

For simplicity, divide both sides by -1:

$16x^2-64x+5=0$

We will use the quadratic formula. In this case a = 16, b = -64, and c = 5. Therefore:

$\displaystyle x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Substitute:

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$\displaystyle x=\frac{64\pm\sqrt{3776}}{32}$

Simplify the square root:

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Therefore:

$\displaystyle x=\frac{64\pm8\sqrt{59}}{32}$

Simplify:

$\displaystyle x=\frac{8\pm\sqrt{59}}{4}$

Approximate:

$\displaystyle x=\frac{8+\sqrt{59}}{4}\approx 3.92\text{ and } x=\frac{8-\sqrt{59}}{4}\approx0.08$

Therefore, the ball will reach a height of 10 feet at approximately x = 0.08 and x = 3.92.

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2 years ago

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andrew11 [14]

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A degenerate circle is a single point, so we can rule out choice C.

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bezimeni [28]

Answer:

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Step-by-step explanation:

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