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3 years ago

1.The expression 4 - 3 is an example of a(n)______________.

Mathematics

1 answer:

jarptica [38.1K]3 years ago

3 0

1. Subtraction

2. Factoring

3. addition property

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If a ball is thrown directly upward with a velocity of 50ft/s, it's height (in feet) after t seconds is given by y=50t-16t^2 wha

Tomtit [17]

Answer:

39.0625 ft

Step-by-step explanation:

Since the function is a quadratic representing height, and the coefficient of the t² is negative, the vertex of the parabola will be the maximum height achieved by the ball.

The general form for a quadratic equation is ax² + bx + c, here a is -16, and b is 50

To find the x coordinate of the vertex, use x = -b/(2a)

We have x = -50/[2(-16)]

x = -50/-32

x= 25/16

Now plug that into the equation to find the y value, which will be the height...

y = 50(25/16) - 16(25/16)²

y = 1250/16 - 16(625/256)

y = 1250/16 - 625/16

y = 625/16

y = 39.0625

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3 years ago

What is measure of angle R? Enter your answer as a decimal, round only your final answer to the nearest hundredth.

victus00 [196]

Tan-1(8/15)= 28.07 degrees.

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3 years ago

What is the slope line of a and c.

faltersainse [42]

Answer:

the amount of y over x

Step-by-step explanation:

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3 years ago

What is 5pi/4 in degrees

Scilla [17]

5pi/4*180/pi= 225 degree

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3 years ago

For each of the following functions, (i) find the constant c so that f(x) is a pdf of a random variable X, (ii) find the cdf, F(

mel-nik [20]

Answer:

(a)

c=1/2

cdf is $F(x) = x^2$

Step-by-step explanation:

Remember that if $f$ is the pdf of a random variable X .

$\int\limits_{-\infty}^{\infty} f(x) \,dx = 1$

Then,

(a)

$\int\limits_{-\infty}^{\infty} 4xc \,dx = \int\limits_{0}^{1} 4xc \, d x = 2c = 1$

Therefore

c=1/2

and

$f(x)=2x$

then to compute the cdf, we have

$F(x) = P(X \leq x) = \int\limits_{-\infty}^{x} 2y \,dy = \int\limits_{0}^{x} 2y \, dy = x^2$

7 0

3 years ago