Step-by-step explanation:
100% = 96
1% = 100%/100 = 96/100 = 0.96
the temperature changed by 96 - 71 = 25.
how many % are these 25 ?
we check how often 1% fits into 25.
that is done by division :
25 / 0.96 = 26.04166667 ≈ 26%
Common diffrence would be 4
Answer:
<u> </u><u>N</u><u>e</u><u>g</u><u>a</u><u>t</u><u>i</u><u>v</u><u>e</u><u> </u><u>rational</u><u> </u><u>number</u><u> </u> :
<u> </u><u>Positive</u><u> </u><u>rational</u><u> </u><u>numbers</u><u> </u> :
None
His answer was (x- +2) (x^2-9)
a) His mistake was he has x^2 in one of the parenthesis, to be fully factored you cannot have an exponent as part of the answer.
b) x^3 - 9x + 2x^2 -18
Reorder the terms:
x^3 +2x^2 -9x -18
Group the first two terms and the last two terms
(x^3 + 2x^2) -9x-18
Factor out the greatest common factor from each group:
x^2(x+2) - 9(x+2)
Factor the polynomial by factoring out the common factor once x+2:
(x+2) (x^2-9)
Rewrite 9 as 3^2:
(x+2) (x^2-3^2)
Factor one last time:
(x+2) (x+3) (x-3)
Answer:
2x - 7 = -12
Step-by-step explanation:
[twice the number of x] [decreased] [7] [is the same as] [negative 12]