If y = kx, what is the value of k if y = 20 and x = 0.4?

Nine more than four times a number is the same as one less than twice the number. find the number?

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Apatient is to be given 35 milligrams of demerol every 4 hours. you have demerol 50 milligrams/milliliter in stock. how many milliliters should be given per dose?