The equation C = 5 + 12p represents the cost, C, of p pens. Determine whether there is a proportional relationship between C and p. Explain or show your reasoning

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

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

Ametal rod is 2/5 meters long. it will be cut into pieces that are each 1/30 meters long. how many pieces will be made from the rod?