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koban [17]
3 years ago
15

a store has 300 televisions on order, and 80% are high definition. how many televisions on order are HD?

Mathematics
2 answers:
Korolek [52]3 years ago
8 0
240 Televisions are on HD.

Dafna1 [17]3 years ago
5 0

Answer: The number of televisions on order are HD  = 240

Step-by-step explanation:

Given : The number of televisions on order= 300

The percentage of televisions orders are high definition = 80%

i..e The proportion of televisions orders are high definition = 0.80  [ we divide percentage by 100 to convert into decimal]

Now , the number of televisions on order are HD = (Total televisions) x (proportion of televisions are high definition)

=(300) x (0.80)

=240

Hence, the number of televisions on order are HD  = 240

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<u>Solution:</u>

Given function is:

f(x) = 2x - 1

We have to find the average rate of change from x = -1 to x = 2

<em><u>The average rate of change is given as:</u></em>

\text {Average rate of change}=\frac{f(b)-f(a)}{b-a}

<em><u>The average rate of change from x = -1 to x = 2 is given by formula:</u></em>

\text {Average rate of change}=\frac{f(2)-f(-1)}{2-(-1)}\\\\\text {Average rate of change}=\frac{f(2)-f(-1)}{3}

<em><u>Find f(2) and f( - 1)</u></em>

<em><u>Substitute x = 2 in given function</u></em>

f(2) = 2(2) - 1 = 4 - 1 = 3

<em><u>Substitute x = -1 in given function</u></em>

f( - 1) = 2(-1) - 1 = -2 - 1 = -3

<em><u>Substitute the values in above formula,</u></em>

\text {Average rate of change}=\frac{3-(-3)}{3}=\frac{6}{3}=2

Thus average rate of change from x = -1 to x = 2 is 2

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