There are 86 people coming to my party and each person will need a cup how many packages of cups will i buy if one package of cups has 25 cups

i think its 4 packages

Step-by-step explanation:each package is 25 so if you get 2 its 50 + another package would be 75  so you need one more.

hope this helps

You need to buy 4 packages of cups.

Step-by-step explanation:

Since you can't buy half a package and everyone needs a cup, you have to buy 4 packs. Even though it's 100 cups, only 3 packs (75 cups) wouldn't be enough cups for everyone to have one.

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15