First gets brainliest if they answer in time :( What is the value of x in the equation -2/5x-2= 18
O-50
O-40
O -8
O-6

)a smart phone has dimensions of 4.9 inches (height), 2.3 inches (width) and 8.0 millimeters (depth). what is the volume of the smart phone in cubic centimeters? (1 in = 2.54 cm)

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?