The value of ratio to determine which are equivalent to 7: 15?

a. 21: 45
b. 14: 45
c. 3: 5
d. 63: 135

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

If sec theta = 5/3 and the terminal point determined by theta is in quadrant 4, then

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution