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qaws [65]
2 years ago
7

-5-4-3

Mathematics
1 answer:
Burka [1]2 years ago
5 0

Answer:

Interval = (-2,1.5)

Interval = (-\infty, -2)\ u\ (1.5,\infty)

Step-by-step explanation:

Given

See attachment for graph

Solving (a): Increasing interval

To do this, we simply identify the interval at which the value of the graph increases.

The value has an increased interval between -2 and 1.5 (of the x-axis).

Hence, the increasing interval is:

Interval = (-2,1.5)

Solving (b): Decreasing interval

To do this, we simply identify the interval at which the value of the graph decreases.

The value has decreased intervals between - infinity and -2 and also 1.5 and infinity (of the x-axis).

Hence, the decreasing interval is:

Interval = (-\infty, -2)\ u\ (1.5,\infty)

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Let the initial number of girls be x, this represents 40% of the dancers.
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