Yes they are similar and their scale factor is 1:3
7 * 3 = 21
4 * 3 = 12
18 * 3 = 54
Hope this helps :
<em>Convert the mixed number to the improper fraction.</em>
Answer:
Lol this is on khan Academy isn’t it and the answer is 5 miles to 1 hour so 5:1
Step-by-step explanation:
You <em>multiply</em> both sides of the first equation by 4.
Then you have . . .
-2x + 4y = 3 and y - 2x = 3 .
If you want to get rid of a fraction, you multiply it by itsdenominator.
BUT ... whatever you do to one term on one side of the equation, you
have to do the same to <em>all</em> the terms on that side, AND then you have to
do the same thing to all the termson the OTHER side.
