Let X be the random variable representing the number
of coins that Matt set aside after three flips.
We have to run n from 0 to 100 and m from 0 to (100-n),
Find the binomial law, then compute the mean like this:
Hope this gives a hint.
Split the second term in 4m^2 + 16m + 15 into two terms
4m^2 + 10m + 6m + 15
Factor out the common terms in the first two terms, then in the last two terms
2m(2m + 5) + 3(2m + 5)
Factor out the common term 2m + 5
(2m + 5)(2m + 3)
A discount of 20% multiplies the number by 1-.20=.8, so the price is going to be .8p.
Answer:
x = −4
Step-by-step explanation:
Add x to both sides of the equation. x + 4 + x = − 4 Add x and x . 2 x + 4 = −4
Subtract 4 from both sides of the equation. 2 x = −4 − 4 Subtract 4 from - 4. 2x = −8
Divide each term in 2x = −8 by 2. 2x/2 = −8/2
Cancel the common factor. 2x/ 2 = −8/2 Divide x by 1. x = −8/2
Divide −8 by 2. x = −4
True because their sum is 90 degrees.
