If y varies directly with X and Y equals 21 when X equals 3 find Y if x =5

35

Step-by-step explanation:

y = k*x

21 = k*3

k = 7

x=5  .. y = 7 * 5 = 35

X = 5 and Y = 35

Step-by-step explanation:

Y is 21 when x is 3. Divide both x and y by 3 giving you y=7 and x=1. Then multiply both sides by 5 giving you x=5 and y=35

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!