Answer:
No it is irrational number.
Step-by-step explanation:
because 2pie cannot be expressed as a quotient of interger.
AB + C
= (x + 1)(x^2 + 2x - 1) + 2x
= x^3 + 2x^2 - x + x^2 + 2x - 1 + 2x
= x^3 + 3x^2 + 3x - 1
7. 0.4
8. 0.55
9. 0.125
10. 3.5
11. 11.8
12. 7.625
13. 0.556 rounded nearest 10th = 0.6
14. 0.455 rounded nearest 10th = 0.5
15. 6.714 rounded nearest 10th = 6.7
Hope this helps :)
Remember, you can do anything to an equation as long as you do it to both sides
for all inequalities, when you multiply or divide both sides by a negaitve, flip the direction of the sign (so from > to < or ≤ to ≥)
so
-1.2z-8.2>-9.7
we want to isolate the variable
add 8.2 to both sides
-1.2z+8.2-8.2>8.2-9.7
-1.2z+0>-1.5
-1.2z>-1.5
divide both sides by -1.2 and flip the sign
z<1.25
