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
Someone please help!! i will<br> make you a brainliest...i don’t want to fail:(((
Serggg [28]

Answer:

the fisrt one is y=1/2x

the second one is y=x+11

the third one is y= x^3

fourth on is y= ^3 checkmark x

Step-by-step explanation: your welcome

8 0
2 years ago
The distance an object falls when dropped from a tower varies directly as the square of the time it falls. If the object falls 1
Tanzania [10]

Answer:

the object will fall 792 feet in 17 seconds

Step-by-step explanation:

first you can do 144 multiplied by 5 because that would be 15 of those seconds next you would do 144 divided by 2 because you only need 2 seconds to reach 17 your answer would be 72 then you would do 720+72=792 so it would fall 792ft in 17 seconds

3 0
3 years ago
Read 2 more answers
H(x)=2x;find h(7) please help​
bearhunter [10]
2? bc if x=7 then it equals 2(7) which is 14 sooo i believe either 7 or 2
5 0
3 years ago
Read 2 more answers
There are 10 soccer teams at the sunnydale soccer league. Each team will play every other team once. How many games will there b
Roman55 [17]

Answer:

90 games

Step-by-step explanation:


6 0
3 years ago
Write as a sum, difference or<br> multiple of logarithms.<br> In(8x) = [ ? ]8+ [ ]x
deff fn [24]

Answer:

In(8x)=[In]8 + [In]x

Step-by-step explanation:

By product rule:

In(8x)=[In]8 + [In]x

8 0
2 years ago
Other questions:
  • Which expression is equivalent to 10x-2x?<br> A: 8x²<br> B: x²<br> C: -10x²+2x<br> D: 10x²-2x
    8·1 answer
  • Find the value of x - help
    14·2 answers
  • I need help with #2 and 4 please help me T^T
    5·1 answer
  • Determine polynomial expressions for the perimeter and the area of the figure shown below
    8·1 answer
  • Helppppp me plzzz with this!!
    10·1 answer
  • Which would not be a step in solving 5x + 15 + 2x = 24 + 4x?
    10·1 answer
  • Square root of x^13 simplify
    9·1 answer
  • Martina, Jim, and Scott served a total of 121 orders Monday at the school cafeteria. Martina served 6 more orders than Scott. Ji
    14·1 answer
  • What is the reason for statement 3, statement 4, and statement 5?
    9·1 answer
  • Which of the following situations could match this formula? (There may be more than one correct answer.)
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!