A note on a piano has given frequency 420. Suppose the maximum displacement at the center of the piano wire is given by 0.18. Find the constants a and w so that d= a cos (wt) models this displacement.

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

In angle pqr find the measure of