How to find r in this equation using combination formula c(8,r)=28

r = 2

Step-by-step explanation:

We have the formula of

Now, it is given that ........ (1)

And we have to find the value of r which satisfy the above equation.

So,

Now, we have to use the trial method to find the value of r.

For r = 1,

Hence, r can not be 1.

Now, put r = 2,

Therefore, r = 2 (Answer)

glide reflection.

its mainly because the pattern will be infinite and will never end. it will look like a gilder or like a filpbook when set to motion.

a. 12.5 kg

step-by-step explanation:

f = ma

so

m = f/a = (2500 n)/(200 m/s²) = 12.5 kg

1 n = 1 kg·m/s²