The last answer, because the class is being divided into four groups. So the class number is not known, thus it is represented by “w” and divided by four.
Hello!
If you divided by two then added 8 to reach 17, simply reverse the process, like so:
17 - 8 = 9
9 * 2 = 18
<u>Jordan's allowance is $18</u>
I hope this helps, and have a nice day!
Non proportional it should be
Answer:
yes
Step-by-step explanation:
it is rational
Answer:
Barbara's speed in clear weather is 
and in the thunderstorm is 
.
Step-by-step explanation:
Let 
be the speed and 
be the time Barbara drives in clear weather, and let 
be the speed and 
be the time she drives in the thunderstorm.
Barbara drives 22 mph lower in the thunderstorm than in the clear weather; therefore,
(1). 
Also,
(2). 
(3). 
,
and
(4). 
From equations (2) and (3) we get:
putting these in equation (4) we get:
and substituting for from equation (1) we get:
This equation can be rewritten as
which has solutions
We take the first solution 
because it gives a positive value for 
.
Thus, Barbara's speed in clear weather is and in the thunderstorm is .
