3 years ago

Please help me out.I need the answer

1 answer:

5 0

Hector accidentally subtracted -2x from 7x instead of adding it. Therefore, in step 2, the correct equation should be

9x = 15

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A ball is thrown from an initial height of 2 meters with an initial upward velocity of 9/ms . The ball's height h (in meters) af

Alecsey [184]

A ball is thrown from an initial height of 2 meters with an initial upward velocity of 9/ms

Balls height $h= 2 +9t -5t^2$

To find all values of t for which the ball's height is 3 meters

We plug in 3 for h and solve for t

$h= 2 +9t -5t^2$

$3 = 2 +9t -5t^2$

Solve for t

$0= -1+ 9t -5t^2$

$5t^2 - 9t + 1 = 0$

Solve using quadratic formula

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

$t= \frac{9+- \sqrt{(-9)^2-4*5*1} }{2*5}$

After simplifying this,

$t= \frac{9+\sqrt{61}}{10}$ = 0.11898

$t= \frac{9-\sqrt{61}}{10}$ = 1.68102

the values of t for which the ball's height is 3 meters= 0.12 sec , 1.68 sec

5 0

3 years ago

Look at this equation 3(x+1)=3x=? which number can be placed in the box *the question mark* that would create an equation that h

KATRIN_1 [288]

The answer to this is 0

8 0

2 years ago

Adam is a golfer who thinks that his drives have an average length of more than 200\text{ m}200 m200, start text, space, m, end

miskamm [114]

Answer:

t=2.24 for khan

Step-by-step explanation:

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2 years ago

Solve the inequality for u.<br> 24 Simplify your answer as much as possible.

Annette [7]

Answer:

hey i think you forgot to add the expression, would u mind adding the question :) thanks

Step-by-step explanation:

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3 years ago

In an election, Candidate A received 75 votes and candidate B received 25 votes, after the first 100 votes were counted. Assume

enot [183]

Answer:

Candidate receives 2250 votes

Step-by-step explanation:

Ratio of votes A : B = 75 : 25 = 3 : 1

3 : 1 = x : 750

Product of means = Product of extremes

1 *x = 3*750

x = 3 *750

= 2250

3 0

2 years ago