A concession stand sells hamburgers and drinks. The revenue from the hamburgers is 30x + 45 dollars. The price of a hamburger is $5. Write an expression that represents the number of hamburgers sold. ___ ( + )

(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.

Given right triangle xyz, which correctly describes the locations of the sides in relation to

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.