If you multiply the first equation by 6, the following system is the result. 3x + 9y = -42
-3x + 2y = -2

To solve this system by elimination,
✔ add
the equations.
The solution to the system is

(_ ,_ ).

Find dy/dx using implicit differentiation ln(20+e^xy)=y

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2