sarah is demonstrating the idea that polynomials are closed under addition her work and explanation are shown part a add 3x^4+6x-7 to a 2x^3-(2x)^2+4x^-1 b (2x)^2+4.4x-9 x(-8x)^-2 -(3x)^3+7 part b is in the picture

50-38=12

step-by-step explanation:

answer: asdfghjkl,mnbv

step-by-step explanation:

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