If Alan had won ten dollars more, he would have won five times as much as Brenda. Which equation expresses this mathematically?
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Hi there!
We can find the range using completing the square:
y = -x² - 2x + 8
Factor out a -1:
y = -(x² + 2x) + 8
Use the first two terms. Take the second term's coefficient, divide by 2, and square:
y = -(x² + 2x + 1) + 8
Remember to add by 1 because we cannot randomly add an additional number into the equation:
y = -(x² + 2x + 1) + 8 + 1
Simplify:
y = -(x + 1)² + 9
Since the graph opens downward (negative coefficient), the range is (-∞, 9)
From 170 to 97, there's a difference of 73.
so hmm if we take 170 to be the 100%, what is 73 in percentage off of it?
so hmm if we take 170 to be the 100%, what is 73 in percentage off of it?