Write the following statement as a mathematical expression. State whether the expression is a linear or nonlinear expression in x. Seven subtracted from five times a number, and then the difference added to nine times a number.

5x-7+9x

I don't actually  know if this is correct 100% but I'm pretty sure it is a linear expression.

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.

by definition, an arc subtended by a central angle of some given measure has the same measure. so .