Joe has 18 mortals all the marbles are either black or gold there are four more gold marbles and black how many black marbles are there

Hey peoples! im bored add me on discord xd emmy#1782 < 3

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

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?