Can a 10 sided polygon have exactly 21 diagonals? Use the formula n(n-
3)/2 *

No

Step-by-step explanation:

for a n-agon the formula is

so in our case n=10

so no, a 10 side polygon has exactly 35 diagonals

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is

sorry i got nothing

step-by-step explanation: