Hey there Bfarrar07 !
This is pretty simple when you think about it.
With algebra problems like this, you want to set it equal to zero.
So your first step is to take 35x + 10 and set it equal to zero.
35x + 10 = 0
Then bring the 10 to the other side by subtracting it, so you have something like this:
35x + 10 (-10) = -10 (Remember, what you do to one side you have to do to the other!) So when you take 10 from the left, you have to take ten from the right.
You now have 35x = -10
In order to get x by itself, you need to divide the problem by 35.
35x/35 = -10/35
On the left hand side, the 35's cancel out, so you're left with x.
And on the right hand side you have -10/35
So x = -10/35 (Don't forget to simplify!)
-10/35 can be reduced to -5/7
X = - 5/7
Hope this helps!
Answer:
Step-by-step explanation:
Since (8x-20) and (3x+2) are two sides of the angles on one plane, we can structure them into an equation to find x.
(8x-20) + (3x+2) = 180
We want x to be on one side and all the numbers to be on the other. But first, we must combine our two problems.
-20 + 2 = -18; 8x + 3x = 11x
So now our equation is:
(11x-18) = 180
In order to move our numbers to one side and leave our x's on the other, we must inverse our additions/subtractions/etc.
180 + 18 = 199
11x = 199
199/11 = 18.1
x=18.1!
Regards!
Answer:
what are the followings..........
Octagon, stop sign.
Eight isoscles triangles. It looks like we're told the side is 9.9 and the height to the side (also called the apothem) is 12.
So each isosceles triangle has area (1/2)(9.9)(12) and we have eight of them,
area = 8(1/2)(9.9)(12) = 475.2
Answer: 475.2
Usually we wouldn't be told 9.9 -- this is the baby version. We know each of those isoscles triangles has unique angle 360/8=45 degrees, so the apothem and half the side of the octagon are a right triangle with acute angle 22.5 degrees.
The area of the right triangle with long leg 12, short leg x,
tan 22.5 = x/12 or
x = 12 tan 22.5
Twice that is what we're told is 9.9; let's check:
2x = 24 tan 22.5 = 9.941125496954282
The area of the little right triangle is
(1/2) 12 × 12 tan 22.5
and there are 16 of these
16 (1/2) 12 × 12 tan 22.5 ≈ 477.174
{ 1,-3,9...}
an = a1 * r^(n-1)
a1 = first term = 1
r = common ratio = -3
so ur formula is : an = 1 * -3^(n-1)
