Shayla states that r2+5r+3r is an equivalent expression to 9r. Why is Shayla’s statement incorrect? Explain

Shayla is incorrect because if you add them it would be 8r+r2

Step-by-step explanation:

You should probably double check because the question it a little confusing and I could always be wrong.

answer

you start with $5 and save $10 a week until you have at least $45wer

step-by-step explanation:

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560