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3 years ago

I’m confused on this one

Mathematics

1 answer:

sladkih [1.3K]3 years ago

3 0

In a triangle, a segment that has as endpoints the midpoints of two sides is parallel to the third side and half the length of the third side.

8x + 2 = 2(13)

8x + 2 = 26

8x = 24

x = 3

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After a baseball is hit, the height h (in feet) of the ball above the ground t seconds after it is hit can be approximated by th

lubasha [3.4K]

Answer:

The ball will take 4.05 seconds to hit the ground.

Step-by-step explanation:

we have

$h=-16t^{2}+64t+3$

This is a quadratic equation (vertical parabola) open down

The vertex is a maximum

we know that

The ball hit the ground when h=0

Solve the quadratic equation

For h=0

$-16t^{2}+64t+3=0$

The formula to solve a quadratic equation of the form

$at^{2} +bt+c=0$ is equal to

$t=\frac{-b(+/-)\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16t^{2}+64t+3=0$

$a=-16\\b=64\\c=3$

substitute in the formula

$t=\frac{-64(+/-)\sqrt{64^{2}-4(-16)(3)}} {2(-16)}$

$t=\frac{-64(+/-)\sqrt{4,288}} {-32}$

$t=\frac{64(-)\sqrt{4,288}} {32}=-0.05\ sec$ ---> the time cannot be a negative number

$t=\frac{64(+)\sqrt{4,288}} {32}=4.05\ sec$

therefore

The ball will take 4.05 seconds to hit the ground.

4 0

3 years ago

Point A lies on the circle and has an x-coordinate of 1.

stellarik [79]

Answer:

$\sqrt{(0-y)^{2}+(0-1)^{2}}=2$

Step-by-step explanation:

we know that

In the circle of the figure the radius is equal to 2 units

The distance from the center of the circle (origin) to the point A must be same at the radius

Applying the formula's distance between two points

point A( 1,y) and point (0,0)

the formula to calculate the distance between two points is equal to

$d=\sqrt{(y2-y1)^{2}+(x2-x1)^{2}}$

substitute the values

$2=\sqrt{(0-y)^{2}+(0-1)^{2}}$

rewrite

$\sqrt{(0-y)^{2}+(0-1)^{2}}=2$

3 0

3 years ago

Read 2 more answers

Needd help please and thank you!! It’s 1/E just in case you couldn’t see that! Thx!

Margaret [11]

Answer:

option A

The base is e^-1

Step-by-step explanation:

Given in the question a function, f(x) = (1/e) $^{x}$

This function can also be write as.

f(x) = $(e^{-1})^{x}$

by using Negative Exponent Rule

$x^{-n}=\frac{1}{x^{n}}$

This says that negative exponents in the numerator get moved to the denominator and become positive exponents.

5 0

3 years ago

IF I BUY A BOOK FOR $30. AND ITS MARKED DOWN 20%. HOW MUCH IS IT MARKED DOWN?

nalin [4]

The price would end up being $24
10% of 30 would be $3 then you double it to find 20% so it would end up being $6 off

8 0

3 years ago

2. 1.6-g when g= 1.2

Alenkasestr [34]

Answer:

0.4

Step-by-step explanation:

1.6 - 1.2 = 0.4

6 0

4 years ago