Help need it very badly

How do you multiply a mixed fraction by a regular fraction

If lmn=xyz, which congruences are true by cpctc? check all that apply

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42