He sum of a number and twenty is greater than four times the number decreased by one.

x = the unknown number

x + 20 > 4x - 1

The sum(addition) of a number and twenty(so x and 20 are added together) is greater than( > ) four times(multiplication) the number(so 4 and x are multiplied together) decreased(subtraction) by one(so 4x is subtracted by 1).

If you need to solve this, you need to isolate/get the variable "x" by itself in the inequality:

x + 20 > 4x - 1      Subtract x on both sides to get "x" on one side of the inequality

20 > 3x - 1      Add 1 on both sides

21 > 3x         Divide 3 on both sides to get "x" by itself

7 > x                or x < 7   [x is any number less than 7]

89

step-by-step explanation:

no because mercury has a density of 13.6 grams per centimeter squared while gold has 19.32 grams centimeter squared

step-by-step explanation: