The square of a number plus the number is 72. find the number(s)

x = 64[/tex]

Step-by-step explanation:

In mathematical notation, the problem is to solve the following equation

We can assume that the new variable is , so the equation is:

We can solve this like a normal quadratic equation

,

The solutions are

We use the positive one, because a square can not be negative

So,

To prove the answer

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.