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3 years ago

Please help me someone?

Mathematics

1 answer:

Komok [63]3 years ago

7 0

The graph that would best represent this data would be a line graph because it is data represented over time.<span />

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The average high temperature each month in a calendar year for a city in South Carolina is represented by the function: f(x)=−x2

LuckyWell [14K]

Answer:

$Average\hspace{3}rate\hspace{3}of\hspace{3}change=-7.7$

Step-by-step explanation:

The average rate of change measures the average rate at which a function changes per unit time in a given interval. In another words, the average rate of change is the relationship between vertical and horizontal changes between two points of the function. So, basically if you are trying to find the average rate of change, you are trying to find the slope.

$Average\hspace{3}rate\hspace{3}of\hspace{3}change=Slope=m=\frac{\Delta y}{\Delta x} =\frac{f(x_2)-f(x_1)}{x_2-x_1}$

If $x$ represents the months, then:

Let:

$September=x_1=9\\December=x_2=12$

So:

For:

$f(x)=-x^2+13.3x+42$

$f(x_1)=f(9)=-(9)^2+13.3(9)+42=80.7\\\\f(x_2)=f(12)=-(12)^2+13.3(12)+42=57.6$

Therefore:

$Average\hspace{3}rate\hspace{3}of\hspace{3}change=\frac{57.6-80.7}{12-9} =\frac{-23.1}{3} =-7.7$

4 0

4 years ago

A jar contains 8 red counters and 21 blue counters. A counter is taken at random from the jar. what is the probity that it is.

Elza [17]

A. 8/29
B. 21/29
C. 0/29

6 0

3 years ago

A jar contains $36.25 in quarters and nickels. How many quarters and dimes are in the jar? Please explain how u got the answer,

kumpel [21]

So, look:

36*4 = 144

There are 145 quarters in all.

And in nickels, there are:

144 * 5 = 720 + 5 = 725
There are 725 nickels in all.

Dimes: 144 * 10 = 1440 + 10 = 1450 (or you could do 145 * 10 and still get 1450. Like I did in the nickels and everything. :) )

= 1450 dimes

I hope this helps!

4 0

3 years ago

Andre received $60 for his birthday that he put in his piggy bank. Each week, he puts 3 more dollars in his bank so that the amo

shusha [124]

I think 96 <span>3(12)+60=36+60=96</span>

4 0

3 years ago

Three friends go apple picking . They pick 13 on saturday and 14 apples on sunday . They share the apples equally. How many appl

nasty-shy [4]

13+14=27 27÷3=9 each person gets 9 apples

4 0

4 years ago