Find dy/dx if y = (cos x) ^ x

Best website to learn math from the beginning? (exept Khan Academy)

X=3y-11, 4x-3y=-26 Substitution

Sally went on a diet and now weighs 138 pounds. She lost 12 pounds total. What is the percent decrease of the weight she lost? F 10% G. 12% • H. 8% J. 6%

zach has akready baked cakes, and he can bake 1 cake with each additional stick of butter he buys, how many additional sticks of butter does zach need in order to bake a total of 27 cakes?

What is 5/8ths of a full rotation in degrees?

A certain hybrid car can travel 1 4/11 times as far as a similar non hybrid car can, each on one gallon of gasoline. If the non hybrid car can travel 33 miles per gallon of gasoline how far can the hybrid travel on 4/5 gallon of gasoline?

What is the value of 6x+4x+8, when x=7

There are 46 runners in a race. how many ways can the runners finish first, second, and third

Which composition of transformations would be the inverse of rotating a figure 90° counterclockwise and then reflecting it over the x-axis?

At the city museum, child admission is $ 5.20 and adult admission is $ 9.40. On Monday, 148 tickets were sold for a total sales of $ 1051.00. How many child tickets were sold that day?