I'd suggest rounding up both $13.59 and $1.85: $14 and $2. Subtracting the discount (~$2) from the price (~$14) results in $12. Subtracting this discounted price from the $20 cash in hand results in change of approx. $8.
Answer:
yes.
Step-by-step explanation:
It doesn't say how long a quarter is for Madelyn's school, but we can assume its around 8 weeks or half a semester which would mean one quiz per week. 1:1 quiz to week ratio is proportional.
<u>Answer:</u>
For 500 minutes, the costs of the two plans are equal.
<u>Step-by-step explanation:</u>
Let t be the time of calls in minutes; and
c be the cost of the monthly plan.
<u>1st plan:</u>
![c_1=28+0.14t](https://tex.z-dn.net/?f=c_1%3D28%2B0.14t)
<u>2nd plan:</u>
![c_2=8+0.18t](https://tex.z-dn.net/?f=c_2%3D8%2B0.18t)
Setting the monthly costs equal to each other to get:
![28+0.14t=8+0.18t](https://tex.z-dn.net/?f=28%2B0.14t%3D8%2B0.18t)
![0.18t-0.14t=28-8](https://tex.z-dn.net/?f=0.18t-0.14t%3D28-8)
![0.04t=20](https://tex.z-dn.net/?f=0.04t%3D20)
![t=500](https://tex.z-dn.net/?f=t%3D500)
when call minutes
, then the cost of the plans are:
1st plan: ![c_1=28+0.14*500](https://tex.z-dn.net/?f=c_1%3D28%2B0.14%2A500)
![c_1=28+70](https://tex.z-dn.net/?f=c_1%3D28%2B70)
![c_1=98](https://tex.z-dn.net/?f=c_1%3D98)
2nd plan: ![c_2=8+0.18*500](https://tex.z-dn.net/?f=c_2%3D8%2B0.18%2A500)
![c_2=8+90](https://tex.z-dn.net/?f=c_2%3D8%2B90)
![c_2=98](https://tex.z-dn.net/?f=c_2%3D98)
Answer:
5/18
Step-by-step explanation:
on khan academy thank me plzzzzzzz