Roxanne graphed this system of equations to find the solution. y =
2
3
x − 5 y = −2x + 3

On a coordinate plane, 2 lines intersect at (negative 3, negative 3).

She determined that the solution is (–3, –3). Is she correct? If not, explain why.
Yes, she is correct.
No. She switched the x and y values of the intersection point when writing the solution.
No. She used the wrong y-intercepts when graphing the equations.
No. She used the wrong slopes when graphing the equations.

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %