Raymond's stamp collection ➞x
Alice′s stamp collection➞75%x
75%x-40%×75%x+140=x-20%x
75%x-30%x+140=80%x
45%x+140=80%x
140=80%x-45%x
x=400
Raymond′s stamp collection ➞400
Alice′s stamp collection➞300
Alice sold 300×40%=120
Answer:120
Proportional means equal, by the way.
I know that this is a proportional relationship because, if you really look at it, you can see the equality between the three pieces of data. 1/2 = 2/4, and 2/4 mile in 2/3 minute... Divide those two numerators by 2/2 and you get the next data piece. Now, multiply the second data piece by 3/3, and you get the third piece.
Now, look at the numbers I told you to multiply/divide by. They all equal 1. In other words, the only difference between them is the time, the unit rate of the distance (1/4 mile/1/3 min) remains the same.
Answer:
If you have a perpendicular shape, like a plus sign, usually what I was taught, right whole side of the "plus" sign are negative. The left side is positive. I think it's how you say it.
Answer:
206.63 %
Step-by-step explanation:
Hello, I can help you with this.
you can easily solve this by using a rule of three
Step one
define the data to use
year:2005
price:513
this is our initial value, the 100 percent (100%)
513⇔100%
then, in 2015 the price was 1060
year:2015
price:1060
%=x( the unknown number)
Step two
do the relation
so, the percentage that the price per ounce of gold increase was 206.63%
I really hope it helps, Have a great day.
One 8 is in the tens place while one is in the hundreds place or 10(80) compared to 100 (800).
