1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lara31 [8.8K]
3 years ago
14

Vanessa wants to purchase a new cell phone plan. The two plans from which she can choose are shown below. Vanessa used the syste

m of equations shown below to determine how many minutes she can talk on both plans for the monthly costs to be equal. CA = 22 + 0.13m CB = 44 + 0.09(m –100) When using substitution to solve the system of equations, what is a reasonable solution? When Vanessa has used the phone for 775 minutes, the cost for Plan A and the cost for Plan B will both be $122.75. When Vanessa has used the phone for 325 minutes, the cost for Plan A and the cost for Plan B will both be $64.25. When Vanessa has used the phone for 32.5 minutes, the cost for Plan A and the cost for Plan B will both be $26.23. When Vanessa has used the phone for 764 minutes, the cost for Plan A and the cost for Plan B will both be $121.32.
Mathematics
1 answer:
user100 [1]3 years ago
3 0

Answer:

2. 325 minutes.

Step by step explanation:

We will substitute our given number of minutes in our both equation one by one to find the correct option.

1. Let us substitute m= 775 in both equations.

CA=22+0.13m

CA=22+0.13\cdot 775

CA=22+100.75=122.75

CB=44+0.09(m-100)

CB=44+0.09(775-100)    

CB=44+0.09\cdot675

CB=44+60.75=104.75

104.75\neq122.75

We can see that both plans have different costs , therefore, 1st option is incorrect.

2. Let us substitute m= 325 in both equations.

CA=22+0.13m

CA=22+0.13\cdot 325

CA=22+42.25=64.25

CB=44+0.09(m-100)

CB=44+0.09(325-100)

CB=44+0.09\cdot 225

CB=44+20.25=64.25

64.25=64.25

When Vanessa has used the phone for 325 minutes, the cost for Plan A and the cost for Plan B will both be $64.25.Therefore, 2nd option is correct choice.

3. Let us substitute m= 32.5 in both equations.

CA=22+0.13m

CA=22+0.13\cdot 32.5

CA=22+4.225=26.225

CB=44+0.09(m-100)

CB=44+0.09(32.5-100)

CB=44+0.09\cdot -67.5

CB=44-6.075=37.925    

37.925\neq26.225

4. Let us substitute m= 764 in both equations.

CA=22+0.13m

CA=22+0.13\cdot 764

CA=22+99.32=121.32

CB=44+0.09(m-100)

CB=44+0.09(764-100)

CB=44+0.09\cdot 664

CB=44+59.76=103.76  

121.32\neq103.76

Therefore, 4th option is incorrect.




You might be interested in
8.2z^2+2.1+7z-0.1-4z+z^2
Mariulka [41]
Answer: 3z^2 + 3z +2
Hope this helps : )
4 0
2 years ago
2y=2(3)+4. Help me plzzzzz
lesya692 [45]

Answer:

y=5

Step-by-step explanation:

Get rid of the parenthesis by multiplying

2y=6+4

Add

2y=10

Divide

y=5

3 0
3 years ago
Read 2 more answers
What is the x-coordinate of the midpoint of the segment whose endpoints are<br> (2, 3) and (-5, 5)?
ArbitrLikvidat [17]

Answer:

(-3/4, 4)

Step-by-step explaination:

add 2 and -5 then divide them by two and get

-1/2

then add 3 and 5 divide them by two and get

11/2

But as long as you remember that you're averaging the two points' x- and y-values, you'll do fine. It won't matter which point you pick to be the "first" point you plug in. Just make sure that you're adding an x to an x, and a y to a y.

so therefore the answer is (-3/4, 4)

7 0
3 years ago
Katya is a caterer. She has a cookie recipe that calls for 2 eggs per batch. Katya wants to know
pickupchik [31]

Answer:

i’m struggling on this

Step-by-step explanation:

if anybody gets the answer please let me know

7 0
3 years ago
Weather is a continuous phenomenon but climate is not give reason for the following​
xz_007 [3.2K]

Answer:

hope it helps

Step-by-step explanation:

The change in weather is a continuous phenomenon but the climate of a place remains more or less the same year after year. Weather is a state of atmosphere at a particular time and is determined by wind condition, atmospheric pressure.

6 0
3 years ago
Other questions:
  • Simplify the expression 2.5(10x+8)+3x
    12·2 answers
  • There are 3 people at a party if each person must shake hands with every other person at the party exactly once how many handsha
    7·2 answers
  • Find the volume of a cone with a height of 12 yd and a base diameter of 10 yd.
    15·1 answer
  • PLZ HELP ASAP!!!!<br><br><br> if pic doesn't come thru fresh the page :)
    5·2 answers
  • Kristen recorded the amount of liquid (in ml) of eight containers. She created a box plot of her data. What is the interquartile
    13·1 answer
  • Explain which hill is steeper: a hill woth rise of 5 and a run of 3 of a hill with rise of 3 and a run of 5.
    14·1 answer
  • HELP HELP PLEASE!! D:<br><br> Determine the missing side length:<br> Please don't give cap!
    5·1 answer
  • A box has 200 socks, 20 are blue and the rest are red. A person draws socks at random from the box, hoping to find a pair of blu
    5·1 answer
  • What is the<br> slope of a line that is parallel to the line<br> shown on the graph?
    13·1 answer
  • Betty's bedroom is 18ft
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!