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mafiozo [28]
3 years ago
11

I need the answer to this question please

Mathematics
1 answer:
Lelu [443]3 years ago
8 0
X^2 + x < 20
x^2 + x - 20 <0
set the left side equal 0

(x+5)(x-4) = 0
x + 5 = 0; x = -5
x - 4 = 0 ; x = 4

so solutions:
x has to be between -4 and 5 means
-5 < x < 4
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"regrouping 1 tenth into 10 hundredths" is taking one of those green tenth sticks and dividing it into 10 hundredth squares. That means that you have 2 wholes, 2 tenths (remaining green sticks), and 10 hundredths (because the only hundredths you have are the ones you got from that tenth you regrouped).

After crossing them out, you have 2 wholes, 0 tenths (because you only had 2 before), and 4 hundredths (because you crossed out 6 of the 10, 10-6=4).

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The graph should be discrete, even though often times you will see it graphed as continuous only because the graphing software used might not have the capability of showing discrete dots rather than continuous lines. Basically you can only sell whole tickets , so that makes the value of x integers .

the fact that y is not an integer is irrelevant.

in fact, y is also restricted in the values it can take.

those values are determined by the factor of 2.50 * x.

when x = 0, y = 0 * 2.50 = 0


when x = 1, y = 1 * 2.50 = 2.50
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the values of y can only be multiplies of 2.50.

the equation used is y = 2.50 * x

x is the number of tickets sold.
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4 years ago
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