Tina sells homemade crafts online. Her online subscription fee is $19.99. She charges $12.50 per
item plus 20% shipping and handling. Materials for
each item cost her $1.75 and shipping costs $1.50
per item. Tina will break even after she sells enough
items to pay for all her costs. How many items does
she need to sell to break even?

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

14.3

step-by-step explanation:

add all the numbers together.

9 + 12 + 15 + 16 + 17 + 17 = 86

now, divide 86 by how many numbers we have: 6.

86 / 6 = 14.3