How do you know when the solution to a system of equation is a precise answer and when it is an approximate answer?

If the width of The rectangle is three times the length of the perimeter of the rectangle is 72 feet, what are the length and width of the rectangle?

What is the factored form of n^2 + n A. n (n + n) B. n (n - 1) C. 2 (n + n) D. 2 (n + 1)

What is 7+78/3=? A. 43 B. 25 C. 25.5 D. 75

What is one million times one thousand in scientific notation

The product of a nonzero rational number and an irrational number? A. Is undefined B. Is a rational number C. Is an irrational number D. Cannot be determined without more information

How do you put this into an equation 10 time the sum of half a number and 6 is 8?

1.62 rounded to the nearest tenth

5x^2=14 in standard form

what is a+1 1/4=2 7/10 solve each equation.

Tell whether the sequence is arithmetic. If it is, what is the common difference? 19, 11, 3, - 5