Answer:
2
Step-by-step explanation:
If you add 2 to all the X's and subtract 3 from all the y's the original coordinates translate into the image
I hope this help?
Answer:
b
Step-by-step explanation:
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Answer: the rate at which Jerri runs on level ground is 6 mph
Step-by-step explanation:
Let x represent the rate at which Jerri runs on level ground.
Jerri figures that she runs 2 miles per hour faster downhill than she runs on level ground. This means that the speed at which she runs downhill is (x + 2) mph
Time = distance/ speed
Four miles of the course is downhill. This means that the time it takes her to run downhill is
4/(x + 2)
Whereas the other 3 miles is on level ground. This means that the time it takes her to run on level ground is
3/x
Jerri jogs 1 hour each day over the same 7-mile course. This means that
4/(x + 2) + 3/x = 1
Cross multiplying by x(x + 2), it becomes
4x + 3(x + 2) = x(x + 2)
4x + 3x + 6 = x² + 2x
x² + 2x - 4x - 3x - 6 = 0
x² - 5x - 6 = 0
x² + x - 6x - 6 = 0
x(x + 1) - 6(x + 1) = 0
x - 6 = 0 or x + 1 = 0
x = 6 or x = - 1
Since the speed cannot be negative, then x = 6 mph
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