5.7 + 6.2 = 11.9 You can round it, but you don't need to. Really. Round it becomes 12. Then its more clear. But if you don't round, it is more exact.
Answer:
Rational
Step-by-step explanation:
<u>Rational numbers:</u>
Rational numbers are such numbers that can be expressed in the form p/q, where the value of q must not be equivalent to 0.
<u>Irrational numbers:</u>
These numbers cannot be expressed in the form p/q, where the value of q must not be equivalent to 0. <u> </u>
![\implies 2.89 = \dfrac{289}{100} \ \ \text{[In} \ \frac{\text{p}}{\text{q}} \ \text{form (\text{q}} \neq 0)]}](https://tex.z-dn.net/?f=%5Cimplies%202.89%20%3D%20%5Cdfrac%7B289%7D%7B100%7D%20%5C%20%5C%20%5Ctext%7B%5BIn%7D%20%5C%20%20%5Cfrac%7B%5Ctext%7Bp%7D%7D%7B%5Ctext%7Bq%7D%7D%20%5C%20%5Ctext%7Bform%20%28%5Ctext%7Bq%7D%7D%20%5Cneq%200%29%5D%7D)
Thus, 2.89 is a rational number.
You just add the LxW and for area you multiply LxWxLxW
Let's call x^2: a; -7x: b; and 10:c
So what I do in this case:
when the number squared does not have a coefficient in front, I ask myself, what does A times C equal
the answer is 10 --> now what factors of ten, add up to -7 (the factors can be negative and/or positive)
the answer is -2 and -5
so with this, you do: (x-2)(x-5)
there's your answer, i hope that makes sense