Expand sqrt((1+x)/(1-x)) in ascending powers of x up to the term in x^3
simplify all coefficients by using x=1/10 obtain an estimate to 3dp for sqrt(11)

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

Solve this problem! extra ! 3025/5.5 = a/90.75