Answer:
Step-by-step explanation:
66u
For two variables that are inversely related, the result of doubling one variable is :The other variable is halved
In inverse relationship, if one amount is made larger, the other one will be made smaller equivalent to the difference
hope this helps
9514 1404 393
Answer:
1. 5 seconds
2. 4.5 seconds
Step-by-step explanation:
Both of these questions can be solved the same way. Each quadratic gives height as a function of time. You're interested in the time at which the height is zero. Factor the quadratic and find the positive value of x that makes the relevant factor be zero.
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1) y = -15x(x -5)
x = 5 makes the second factor zero
The golf ball is in the air 5 seconds.
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2) y = -12x(x -4.5)
x = 4.5 makes the second factor zero
The football is in the air for 4.5 seconds.
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<em>Additional comment</em>
The "zero product rule" tells you a product will be zero if and only if one or more of the factors is zero. When a factored quadratic (or any other polynomial) is zero, one of the factors must be zero. If the factor is of the form (ax+b), then the corresponding solution is ...
ax+b = 0 ⇒ ax = -b ⇒ x = -b/a
That is, once you have the factored form, you can write the solutions "by inspection."
The answer would be C
<span>{(0, −3), (2, 9), (4, 21)}</span>
