There both in the decimal place
<span>y=2x−3</span><span> </span><span>y=<span>x2</span>−2x−8</span>
<span>2x−3=<span>x2</span>−2x−8</span>
<span>0=<span>x2</span>−4x−5</span>
<span>0=<span>(x−5)</span>⋅<span>(x+1)</span></span>
<span>0=x−5</span><span> & </span><span>0=x+1</span>
<span>5=x</span><span> & </span><span>−1=x</span>
<span>x=5,1</span>
Step-by-step explanation:
the third of 7 consecutive numbers is 12.
so, this looks like
..., ..., 12, ..., ..., ..., ...
that means the numbers have to be
10, 11, 12, 13, 14, 15, 16
the sum is then
16+10 + 15+11 + 14+12 + 13 = 3×26 + 13 = 91
Well I don't know !
Let's get together and work it out.
We don't know the original price yet, but we need to give it a name so that we can work with it in math equations and stuff. I'm going to call it OP.
OP was reduced by 45% before Fred came along.
That means that 45% of OP was cut off and discarded.
How much of it was left ?
Well, before it was reduced, 100% of it was marked on the price tag.
After 45% was cut off, there was (100% - 45%) = 55% of it left.
That's what Fred paid for the one he bought . . . 55% of OP.
55% of OP is $124 .
We have to change that sentence into math.
-- 55% means 0.55
-- "of" means "times"
-- "is" means 'equals sign'
So now we can write: 0.55 x OP = $124
There's the equation.
Now, divide each side
by 0.55, and you get OP = $124 / 0.55
= $225.45