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3 years ago

I will give brainliest to whoever answers this question:) help a dummy out

Mathematics

2 answers:

Kay [80]3 years ago

7 0

Answer:

Step-by-step explanation:

The equation is a parabola, that opens up downwards, and the point from which Sarah throws the ball is 5 feet off the ground. so set the height to zero ( when the ball reaches the ground ) and solve for t

0 = -16 $t^{2}$ + 18t + 5

use quadratic equation :)

-b +- sqrt( $b^{2}$ - 4ac) / 2a

-18 +- sqrt[ $18^{2}$ - 4 (-16)(5) ] / 2(-16)

-18 +- sqrt[324 +320 ] / -32

-18 +- sqrt[644] / -32

-18 +- 25.377155 / -32

do the positive choice :

-18 + 25.377155 / -32

7.377155 / -32

-0.2305 ( so this answer would be where the ball would hit the ground if the arc extended down to the ground behind where Sarah throws the ball from. so this answer doesn't count in our domain. Because it's before Sarah throws the ball)

do the negative choice:

-18 - 25.377155 / -32

1.355536 ( this answer looks good, about 1.35 seconds for the ball to fly , this was more of a toss than a throw. )

t = 1.4 seconds ( rounded to nearest 10th )

aliya0001 [1]3 years ago

5 0

Answer:

Step-by-step explanation:

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What is reciprocal of the fraction in the equation 3/5(2x+8)=18?

Katen [24]

Answer:

5/3

Step-by-step explanation:

The reciprocal is the fraction upside down.

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2 years ago

Kaylis [27]

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3 years ago

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alex41 [277]

Answer:

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3 years ago

A computer training institute has 625 students that are paying a course fee of $400. Their research shows that for every $20 red

Anastasy [175]

1.
If no changes are made, the school has a revenue of :

625*400$/student=250,000$

2.
Assume that the school decides to reduce n*20$.

This means that there will be an increase of 50n students.

Thus there are 625 + 50n students, each paying 400-20n dollars.

The revenue is:

(625 + 50n)*(400-20n)=12.5(50+n)*20(20-n)=250(n+50)(20-n)

3.

check the options that we have,

a fee of $380 means that n=1, thus

250(n+50)(20-n)=250(1+50)(20-1)=242,250 ($)

a fee of $320 means that n=4, thus

250(n+50)(20-n)=250(4+50)(20-4)=216,000 ($)

the other options cannot be considered since neither 400-275, nor 400-325 are multiples of 20.

Conclusion, neither of the possible choices should be applied, since they will reduce the revenue.

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4 years ago

F to the second time F to the Third

miskamm [114]

Answer:

$F^{5}$

Step-by-step explanation:

$F^2 \times F^3 =$

$= F^{2+3}$

$= F^{5}$

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3 years ago

Read 2 more answers