The variable z is directly proportional to x. when x is 10, z has the value 190. what is the value of z when x = 13?

i just took the test, the correct answer is .. 31.5 in.

the rocket cannot penetrate the ground, in a contextual sense, therefore the roots of this equation should be the domain of this function. i'll let you find the roots of this quadratic equation (hint: use the quadratic formula:  

1- c

2-a

step-by-step explanation:

mark brainliest!