What are the solutions to the equations?

D

Step-by-step explanation:

x=(-4(plus minus)sqrt(4^2-4*2*(-1))/2*2

x=(-4(plus minus)sqrt(16+8))/4

x=(-4(plus minus)sqrt(24))/4

x=(-4(plus minus)sqrt(2*2*6))/4

x=(-4(plus minus)2*sqrt(6))/4

x=(2(-2(plus minus)*sqrt(6)))/2*2

x=(-2(plus minus)*sqrt(6))/2

x=(-2+sqrt(6))/2

x=(-2-sqrt(6))/2

(Option 4 I think, but can see for sure)

75 tickets have been sold so far.

step-by-step explanation:

in this question it is clearly mentioned that 45 children's tickets have been sold and this number is 60% of the total tickets sold.

now let's assume the total number of tickets sold be x.

then 60% of x = 45

⇒

⇒ x(.6) = 45

by dividing with .6 on both the sides of the equation

⇒ x = 75

therefore 75 tickets have been sold so far.

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

hope this ! ^w^