Which number when rounded to the nearest whole number 4

Give f (x) = 5x + 7, what is the value of f (12) ?

Let f (x) = cos-1x. Then the domain of f (x) is [-1,1] and the range is all real numbers. true or false?

An item is regularly priced at $50 . It is on sale for 60% off the regular price. How much (in dollars) is discounted from the regular price?

What is the vertex form of f (x) = x^2-12x+36

The bill for five glasses of apple juice and four salads is $9.50, but the total for four glasses of apple juice and five salads is $10.30. What would the be the bill for a glass of juice and a salad?

I am currently learning Complex Numbers, and I know nothing. so any info on this?

Rue or false? using the regression equation to make predictions for values of the predictor variable outside the range of the observed values of the predictor variable is risky and unreliable.

4 (x+1) - 7 = 3 (x-1) + x

Ben is sailing on a ship. The ship goes 600 miles north and then turn west. It travels 200 miles west and turns sought for 450 miles. It turns west again and travels 170 miles and turns south once more and travels 150 miles.

The volume of a tissue box is 288in3. If the box has a width of 6 inches and it is 4 inches high, how long is the box?