A student needs to collect exactly 20 insects for a science project. The student has already collected 13 insects. Write an equation that can be used to find n, the number of insects the student still needs.
A. 13n = 20
B. n - 13 = 20
C. n + 13 = 20
D. 20 + 13 = n

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is

Math question.. plz me .. best answer all