Write sin3x-sin7x as the product of functions with a positive argument

Any ideas? I am stumped

What is the y-intercept of the line given by the equation

Alina fully simplifies this polynomial and then writes it in standard form. xy2 – 2x2y + 3y3 – 6x2y + 4xy2 if alina wrote the last term as 3y3, which must be the first term of her polynomial in standard form? xy2 5xy2 –8x2y –2x2y

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?