Ajeweler has five rings, each weighing 18 grams, made of an alloy of 10% silver and 90% gold. he decides to melt down the rings and add enough silver to reduce the gold content to 45 %. how much silver should he add?

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

What is the expression in factored form? 225x^2 - 144 a. 9(5x+4)^2 b. 9(5x-4)^2 c. 9(4x+5)(4x-5) d. 9(5x+4)(5x-4)