Solve for x

Remember that sec=1/cos:

Invert both members:

Consider the arccos of both sides:

Arccos and cod simplify:

Add 15 to both sides:

Divide both sides by 2:

total amount of money that he should pay if he has not used his duty free exemption is $98

step-by-step explanation:

given a united states citizen returning to the states declares the following items at the customs office: 3 shirts at $8.50 each 2 dresses at $27.50 each 1 pair of gold cuff links at $17.50 per pair. we have to find how much he pay

cost of 3 shirts if one cost at $8.50 is

cost of 2 dresses if one cost at $27.50 is  

cost of 1 pair of gold cuff at $17.50

so, total amount of money that he should pay if he has not used his duty free exemption is   $25.5+$55+$17.50=$98

if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: