The sum of x and y is a rational number. Which statement is correct?
The number represented by y must be rational
The number represented by x must be rational.
The number represented by x may be rational or irrational.
D)
The number represented by x must be rational and the number
represented by y must be rational

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ab=9, and ac=12, find hc.

What is the sum of these mixed numbers 2 1/8 + 4 3/8

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