Ethan starts the week with a balance of $275.00 in his checking account. During the week, he uses his debit card to spend $27.50 on food, $12.00 at the movies,
and $6.75 for music downloads. He earns and deposits $45.00 for mowing lawns.
What is Ethan's balance at the end of the week?

he earned 78.75 in interest.

step-by-step explanation:

look in attachments

step-by-step explanation:

a = (-2, 0)

b= (-4, 0)

c = (-5,2)

d = (-1,2)

step-by-step explanation:

consider the parallelogram shown in the attached image.

in the parallelogram hijk, the length of hk is given as,

from the properties of parallelogram we know that the opposite sides of a parallelogram are parallel to each other and are equal in measure.

therefore, the length of the side ij must be equal to the length of the side hk and that is .

hence, the expression for the length of ij confirms that hijk is a parallelogram.

a+b=c is your answer