A student earned a grade of 80% on a math test that had 20 problems. How many problems on this test did the
student answer correctly? (round to the nearest whole
number)

Fast! find the length of cu. the triangles are similar. show your work.

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)