Jonas and norma's restaurant bill comes to $23.40. they are planning to tip the waiter 15% of there bill. how much money should they leave for a tip

Asap! i'm not good math and i'm lost.

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = -6. which function could heather be writing? fx) = x2 + 36x + 12 = x2 - 36x - 12 f(x) = -x + 12x + 36 f(x) = -x? - 12x - 36

Indicate the formula for the following conditions: p^c(n,r)=