Hmm ok what thw answer would be is x=-0.4
Since you subtract 0.4 from both sides end up with -9x=3.6 and then divide -9 on both sides -9x/-9 cancel and 3.6/-9 and end up with x=0.4 hope this helped
<u>Answer:</u>
The correct answer option is D. 0.42.
<u>Step-by-step explanation:</u>
We are given the results of a survey in which people were asked if they prefer reading books or e-books.
We are to find the marginal frequency of the number of people who prefer to read books.
For that, we will divide the total number of people who prefer reading books by the total number of people surveyed.
Marginal frequency = 105/250 = 0.42
Bearing in mind that, if you multiply, any integer whatsoever by 2, you end up with a even integer, 17*2, or 19*2, 88*2 you name it, you get an even number
now, you can get an odd integer by simply going from an even integer, back or forth, so if you have an even number of say 24, 24 - 1, 23, 24+1, 25, 23 and 25 are the odd ones next to 24
so.. let's pick some number, let's say hmm "a", we know 2*a is even, so 2a, thus, 2a +1 or 2a -1 is an odd one.... let's use hmm 2a + 1 as our first odd integer
to jump from an odd integer to another, you simply add 2, 3+2, 5, 5+2, 7 and so on
so... our first one is 2a + 1, so the next consecutive one, will then be (2a+1)+2
and next consecutive after that is (2a+1+2)+2
so our three consecutive odd integers are then
2a + 1
2a + 3
2a + 5
now, 4 times the middle is 4(2a+3)
the sum of the first and last is (2a+1) + (2a+5)
now, two more than that is just (2a+1) + (2a+5) + 2
thus
4(2a + 3) = (2a + 1) + (2a + 5) + 2
solve for "a"