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? (put the answer and explanation if you can please.) ​

Which graph represents the following piecewise defined function?

The variable in a relation who’s value depends on the value of the independent variable is called what?

which of the following sets of data would produce the largest value for an independent-measures t statistic? the two sample means are 10 and 20 with variances of 20 and 25 the two sample means are 10 and 20 with variances of 120 and 125 the two sample means are 10 and 12 with sample variances of 20 and 25 the two sample means are 10 and 12 with variances of 120 and 125