3. Select all equations that can result from adding or subtracting these 2 equations: 5x+y = 12
3x - 5y = 4

a. -2x-4y=8
b. -2x+6y=8
c. 4x-4y=16
d. 4x+4y=16
e. 2x-6y=-8
f. 5x-4y=28

Ivan and jeff buy a package of 8 pens for $4.00. ivan wants 5 of the pens, and jeff wants 3.how much should each student pay?

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.