Answer: what is it?
Step-by-step explanation:
A quadratic equation is in the form of ax²+bx+c. The time at which the height of the ball is 16 feets is 0.717 seconds and 1.221 seconds.
<h3>What is a quadratic equation?</h3>
A quadratic equation is an equation whose leading coefficient is of second degree also the equation has only one unknown while it has 3 unknown numbers. It is written in the form of ax²+bx+c.
The complete question is:
A ball is thrown from an initial height of 2 feet with an initial upward velocity of 31 ft/s. The ball's height h (in feet) after 7 seconds is given by the following, h=2+31t-16t². Find all values of t for which the ball's height is 16 feet. Round your answer(s) to the nearest hundredth.
The time at which the height of the ball is 16 feet can be found by,
h = 2 + 31t - 16t²
16 = 2 + 31t - 16t²
16 - 2 - 31t + 16t² = 0
16t² - 31t + 14 = 0
t = 0.717 , 1.221
Hence, the time at which the height of the ball is 16 feets is 0.717 seconds and 1.221 seconds.
Learn more about Quadratic Equations:
brainly.com/question/2263981
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Answer: The value of square root of 75 is 8.65.
Step-by-step explanation:
Since we have given that
a) Explain why her reasoning is incorrect.
Her reasoning is incorrect.
As we can write it as :
(b) Estimate the square root of 75 to the nearest thousandths without using your calculator. Show
As we know that
So, the square root of 75 would be :
Hence, the value of square root of 75 is 8.65.
Answer:
For the first equation
Twice a number added to a smaller number is 5 is written as
2x + y = 5
For the second equation
The difference of 5 times the smaller number and the larger number is 3 is written as
x - 5y = 3
Hope this helps you