Answer: 1) 300 min
2) 680 min
Step-by-step explanation:
1) As the charge was $21 at 0.07, x is the minutes he used, we have:
0.07x = 21
x = 21/0.07
x = 300
2) As the charge was $40 and the company charges different rates for minutes, we know from 1 that the first 300 min costs $21, we have
40 - 21 = 19
So $19 was charged with the $0.05 fee. so:
0.05x = 19
x = 19/0.05
x = 380
300 + 380 = 680 min
Answer:
first one is a 20 prcent decrease from x to y
and for the second one is it a 37.5 percent increase
Step-by-step explanation:
hope this helped
Answer:
I Don't know....
Step-by-step explanation:
sry.....
A proportional change means that for every change in 1 value, it is accompanied by a change in another value that is the same every time. For example, with this, if x=1 then y=2*1=2. If we move x up 1 value to 2, y=2*2=4. Next, if we move x one more value up then 3*2=y=6. As you may notice, y adds up by 2 every time. In addition, you multiply the x value by the same number every time and only that number (no adding anything) and it is therefore a proportional equation
Answer:
8, 640
Step-by-step explanation:
It just is :) hope it helps