These are the ones I don't understand, right from the start

(This one is supposed to be solved around principles such as (fog)/(gog) etc etc....)1. A coupon for $5 off any lunch price states that a 15% tip will be added to the price before the $5 is subtracted. So, C(x) = x - 5 represents the price after the coupon reduction.

T(x) = 1.15 x represents the price after the tip is applied. Calculate C(T(x)) and T(C(x)). Which composite function represents the conditions of the coupon?

2. “n” is inversely proportional to t+3. If t = 1 when n = 3, find t when n =4.

3. When a seesaw is perfectly balanced, each person’s distance, “d,” from the fulcrum varies inversely as his weight, “w.” If a 120-pound person sits 5 feet from the seesaw fulcrum, where must a 150-pound person sit to balance the seesaw?

(FIND THE INVERSE OF THIS FUNCTION) 4. New carpeting can be purchased and installed for $22.00 per square yard, plus a $50 delivery fee. (a) Write an equation that gives the cost, c, to carpet “s” square yards. (b) Find the inverse of the cost function. How many square yards can be carpeted for $1810?

Solve.

Thanks a bunch! I will give plenty more thanks as we work our way along

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