the average height of a class of 18 students is 105cm. After the arrival of 7 new students the average decreases by 5cm. Find sum of the heights of all the students in the class

Step-by-step explanation:

18+7=105-5

25/25=100/25

4

the correct is answer is a 9-sided polygon!

the required function is .

step-by-step explanation:

from the given table it is noticed that the graph passing through (-3,7), (0,4), (3,1) and (8,-4).

it is a linear function because the value of y is decrease by one as the value of x increase by 1.

the slope of the function is

the slope of the function is -1 and the y-intercept is 4.

the slope intercept form is

where, m is slope and b is y-intercept.

therefore the required function is . the graph of this function is shown below.