Because the lid of a marker is wider than the marker itself, a set of markers can be packaged in a container that is in the shape of a trapezoid instead of a rectangle.

The difference in area between the trapezoid and the rectangle is 10 in²

Step-by-step explanation:

The dimensions of the trapezoid are given as follows;

Base 1, a = 12 in

Base 2, b = 10 in

Height, h = 10 in

Area, A of trapezoid;

The dimensions of the rectangle are given as follows;

Base = 12 in

Height = 10 in

Area, A of rectangle;

Base × Height = 12 × 10 = 120 in^2

Therefore, the difference in area between the two packages is found as follows;

Difference in area between trapezoid and rectangle = 120 - 110 = 10 in²

The difference in area between the trapezoid and the rectangle = 10 in².

step-by-step explanation:

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a