Plz ! the expression (cosx) / (1 - sinx) is equivalent to
a) (1+sinx) / cosx
b) (1-sinx) / cosx
c) cos(x)(1+sin(x))
d) cos(x)(1-sin(x))

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

What is the value of x in the equation7x+2y=48 when y=3

What is the volume of a rectangular crate that has dimensions 9 inches by 9 inches by 1 feet? 1,458 in.3 121.5 in.3 1,012.5 in.3 36 in.3