Algebra 1 question, Please help. Picture attached below ^^

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

Which statements describe the solutions to the inequality x< -20 check all that apply. there are infinite solutions. each solution is negative. each solution is positive. the solutions are both positive and negative. the solutions contain only integer values. the solutions contain rational number values.