If you were solving a system of equations and you came to a statement like 4 = 4, what do you know about the solution to the system?

True for all value of the variables involved .

Step-by-step explanation:

While solving system of equations if we have the left and right sides equal then we say the system of equaitons have infinite number of solutins.The equation is true for all values of x .

For example we have x+4=x+4 .

Subtracting x both sides we have 4=4.

That is the equation is true for all values of x .x can take any values.It is set of real numbers.

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)

ending amount = beginning amount / (2^n)

where "n" = number of half-lives (or elapsed time / half-life)

ending amount = 50 mg / (2 ^10 / 5.3)

ending amount = 50 mg / (2 ^ 1.8867924528)

ending amount = 50 m / 3.6981210597

ending amount = 13.5203794557 mg

or about 13.5 mg remain

source: