What is a rational number that is located between 31.5 and 31.6

the rational number between 31.5 and 31.6 is 31.55

Step-by-step explanation:

Now, we know that, average of the given numbers will lie in between the given numbers.

And, as we are finding average, which means sum divided by 2, it can be written in form.

So, it will be an rational number between given numbers.

Then, average of 31.5 and 31.6 =

Average =

Average = 31.55  

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

answer: h

step-by-step explanation: