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3 years ago

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Joseph earns $15 for every law he mows. Is the amount of money he earns professional to the number of launch he mows? Make a tab

le to help you did if I the type of relationship

1 answer:

yKpoI14uk [10]3 years ago

3 0

launch?

I need this written better to understand.

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TiliK225 [7]

C. 24
This is because 20 divided by 5 is 4. Next, you multiply 6 and 4 to get 24. 24 is the answer.

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Find x when<br> -1/2<br> +<br> X<br> =<br> -21/4

Zigmanuir [339]

Answer:

-19/4

Step-by-step explanation:

-1/2 + x =-21/4

x=-21/4+1/2

x=-21/4+2/4

x=-19/4

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3 years ago

In a video game, a bird is flung on a sling shot and follows a parabolic path. The path of the bird can be modeled by the equati

Novay_Z [31]

Answer:

The bird will take 0.88 seconds to reach a height of 40 feet in the air for the first time

Step-by-step explanation:

we have

$h=-16t^2+55t+4$

This is a vertical parabola open downward

The vertex represent a maximum

where

h is the height of the bird

t is the amount of time, in seconds, the bird had been in the air

For h=40 ft

substitute in the quadratic equation

$40=-16t^2+55t+4$

$-16t^2+55t+4-40=0$

$-16t^2+55t-36=0$

The formula to solve a quadratic equation of the form

$ax^{2} +bx+c=0$

is equal to

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

in this problem we have

$-16t^2+55t-36=0$

so

$a=-16\\b=55\\c=-36$

substitute in the formula

$x=\frac{-55\pm\sqrt{55^{2}-4(-16)(-36)}} {2(-16)}$

$x=\frac{-55\pm\sqrt{721}} {-32}$

$x=\frac{-55+\sqrt{721}} {-32}=0.88\ sec$

$x=\frac{-55-\sqrt{721}} {-32}=2.56\ sec$

therefore

The bird will take 0.88 seconds to reach a height of 40 feet in the air for the first time

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3 years ago