If the equation is -2y=0, you have to add the the -2y to the other side, so it turns out to be 0=+2y.
Supposing that the trail mix was 5/8 pound, and Lisa gave 1/8 pound, then to know what is left we only have to subtract those fractions:
5/8 - 1/8 = 4/8
that is because we only subtract the numerators (upper part) of the fractions due to the fact that the denominators are equal, now, 4/8 can also simplify to 1/2
therefore there are left 4/8 pound of trail mix or, what is the same, 1/2 pound of it
To calculate the volume of a rectangular prism, in this case the carton, simply multiply the length, width, and height.
×
×
=
70 ......................................
