Part a: find the lcm of 5 and 12. show your work. (3 points) part b: find the gcf of 72 and 81. show your work. (3 points) part c: using the gcf you found in part b, rewrite 72 + 81 as two factors. one factor is the gcf and the other is the sum of two numbers that do not have a common factor. show your work. (4 points)

What is the slope of a line that is perpendicular to y = 3x + 1

Solve the problem. a student earned grades of c, a, b, and a in four different courses. those courses had these corresponding numbers of credit hours: 4, 5, 1, and 5. the grading system assigns quality points to letter grades as follows: a = 4, b = 3, c = 2, d = 1, and f = 0. compute the grade point average (gpa) and round the result to two decimal places. 3.40 3.50 8.75 2.18

Me. i can't figure out this question. give an explanation too. .