Answer:
300 minutes
Step-by-step explanation:
Let
x----> the numbers of minutes used
y ---> the cost per month
we know that
<em>First cell phone plan</em>
y=0.15x+20 ---> equation A
<em>Second cell phone plan</em>
y=0.10x+35 ---> equation B
equate the equation A and equation B
0.15x+20=0.10x+35
Solve for x
0.15x-0.10x=35-20
0.05x=15
x=15/0.05
x= 300 minutes
Find the cost y
y=0.15(300)+20 =$65
That means
For x=300 minutes
The cost for both calling plans is y=$65
Answer:
If the semicircle rotated around the line, it would become a sphere. So, A. sphere.
Step-by-step explanation:
When a number is not completely divisible by a second number, there is an excess which is known as the remainder. In this case, 8529 divided by 42 yields the answer of 203.071. We can calculate the remainder by multiplying 203 by 42 and subtracting the answer from 8529. In this case the remainder is 3.
You replace x with 4 7•4•2-6•4= 32
30-(increase/0.5)*2=sold
i*s=revenue
i*30-(i^2/0.5)*2=r
I=7.5=>r=0
i=7=>r=14
7/0.5=15 number of increases in the cost
