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
koban [17]
3 years ago
6

A phone company charges $0.06 per minute for local calls and $0.15 per minute for international calls. When your bill comes, it

states that you accumulated 852 minutes with a charge of $69.84. Write and solve a system of linear equations to find the number of local and international minutes used
Mathematics
1 answer:
solmaris [256]3 years ago
6 0
Let's assume two variables x and y which represent the local and international calls respectively. 

x + y = 852 = total number of minutes which were consumed by the company (equation 1)
0.06*x+ 0.15 y =69.84 = total price which was charged for the phone calls (Equation 2)
 from equation 1:-
x=852 -y (sub in equation 2)
0.06 (852 - y) + 0.15 y =69.84

51.12 -0.06 y +0.15 y =69.84 (subtracting both sides by 51.12)
0.09 y =18.74
y= 208 minutes = international minutes (sub in 1) 
208+x=852 (By subtracting both sides by 208)
x = 852-208 = 644 minutes = local minutes
You might be interested in
What is the area of the triangle below? 8 17
melisa1 [442]

Answer:

68 un²

Step-by-step explanation:

3 0
3 years ago
Which prediction can you make based on this graph?
Colt1911 [192]

Answer:more people will be living in Africa than in Asia sometime around 2120

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
What does it mean to solve the system of equation?
Alexeev081 [22]
Solving a system of equations usually means that you solve for a variable in a specific equation. Systems of equations consist of 2+ equations that contain the same variables.

Ex :

2x + 2y = 8
3x + 3y = 9

Then, using those equations, you solve for x & y

~Hope I helped!~
7 0
4 years ago
0.4(2x + 0.3) = 1/3 (6x - 7.2)
GenaCL600 [577]
What are u looking for ?
5 0
3 years ago
Read 2 more answers
Stu Dent has 7 different math books, 5 different science books and 10 different engineering books. Find the number of ways to pi
zepelin [54]

Answer:

155

Step-by-step explanation:

Number of math books = 7

Number of science books = 5

Number of engineering books = 10

We need to find the number of ways to pick two books with different subjects.

Solution :

We will use combination here .

If we need to choose r objects from total n objects ,

n_{C_{r}}=\frac{n!}{r!(n-r)!}

So, number of ways to pick two books of same subjects = 7_{C_{2}}+5_{C_{2}}+10_{C_{2}}=\frac{7!}{2!5!}+\frac{5!}{2!3!}+\frac{10!}{2!8!}\\\\=\frac{7\times 6}{2}+\frac{5\times 4}{2}+\frac{10\times 9}{2}\\\\=21+10+45=76

Also, number of ways to select any two books = 22_{C_{2}}=\frac{22!}{2!20!}=\frac{22\times 21}{2}=21\times 11=231

Therefore , number of ways to pick two books with different subjects =

number of ways to select any two books - number of ways to pick two books of same subjects = 231 - 76 = 155

3 0
4 years ago
Other questions:
  • Of the 50 fish that Alan caught from the lake, 14 were trout. The estimated population of the lake is 7,500 fish. About how many
    15·2 answers
  • WHAT DIS IZ MAN!! I NEED HELP BEEN FAILING DIS LADY CLASS SINCE 8 GRADE!!!
    6·1 answer
  • Given the formula for the perimeter of a rectangle where l represents the length and w represents the width. 2(l + w) What does
    6·1 answer
  • A tire store arranged its tires in rows from the most expensive tires to the lowest price. A set of tires from the first row cos
    7·1 answer
  • How many radians is 270°??
    11·1 answer
  • Is 300 degrees the same as -60 degrees in a drawing?
    9·1 answer
  • If the probability that the Islanders will beat the Rangers in a game is 1/9, what is the
    11·1 answer
  • Người ta thống kê được rằng mỗi chuyến bay có chừng 0,5% hành khách bị mất hành lí và giá trị trung bình mà khách đòi bồi thường
    14·1 answer
  • The Bears have won 7 and tied 2 of their last 13 games. They have not forfeited any games. Which ratio correctly compares their
    12·1 answer
  • Solve for x 0°&lt;x&lt;360<br>3cos2x +sinx=1​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!