If you spend at least $50(including shipping) at an online store, you receive a $10 gift card. You want to purchase CDs that cost $12 each. If shipping costs $5, write and slice an inequality to find the number of CDs you must buy to receive the gift card.

5 CD's

Step-by-step explanation:

5(#of CD)*12($ for each CD)=60+5 for shiping= 65-10(Gift card)= 55

It says at least 50 so you could not do 4 CD which would be less than $50 spent

Hope this helps :)

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

answer: 800

step-by-step explanation: