Jen is planning a party for 80 people. If she wants to send out 20% of the invitations today, what proportion can she use to determine how many invitations she needs to get ready, x?

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i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!

the first one, all those points on the line just make a strait line.