A slice was made through the shape shown below. The slice is parallel to the base of the shape. What is the shape of the cross section that results from the slice?
8 in
8 in
8 in
A triangle
B. square
C rhombus
D trapezoid

Simply 8x squared + 5(7x squared- x) - 2x =

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?