3. Perform the operations and simplify a) (x-5y-92) + (-6 +9y-22) b). (9y-14yz-82)-(12y-8yz+42) 2pts Total profit P is defined as total reverse R mins total cost C. and is given by the function 4. P(x) = R(x)-C(x). Find the total profit P(x) if (x) - 280x-0.4x and C(x) = 7000+ 0.6x 2pts 5. Find each product a) (-8x)(-x)(-3x) b) (5x+4y)(4x-2y) 2pts 6. Find the product 202-198 using the difference of squares formala 7. Given f(x) = 2x + 5, and g(x)=x-3. find the following: a) (fg)(x) b) (fa)(-2) c) 3-(fg)(-1) 30%