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
77julia77 [94]
3 years ago
10

Isaac downloaded 7 ringtones. Each polyphonic ringtone costs $3.25, and each standard ringtone costs $1.50. If he spends a total

of $21 on ringtones, find the number of polyphonic and standard ringtones he downloaded.
Mathematics
2 answers:
anzhelika [568]3 years ago
6 0

Answer:

6\ polyphonic\ ringtones  and 1\ standard\ ringtone

Step-by-step explanation:

Let

x -----> the number of polyphonic ringtones

y ----> the number of standard ringtones

we know that

x+y=7

x=7-y -----> equation A

3.25x+1.50y=21 -----> equation B

Solve the system of equations by substitution

Substitute equation A in equation B and solve for y

3.25(7-y)+1.50y=21

22.75-3.25y+1.50y=21

3.25y-1.50y=22.75-21

1.75y=1.75

y=1\ standard\ ringtones

Find the value of x

x=7-1=6\ polyphonic\ ringtones

Vlad1618 [11]3 years ago
4 0

Answer:

6 polyphonic, 1 standard

Step-by-step explanation:

You might be interested in
0.5 + (-1.5) - (-5.5) =
alexgriva [62]

Answer:

4.5

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
The sum of 10 and a product of 7 and a number
NeX [460]
The answer to your question, would be 7x + 10.

Hopefully this helps!
8 0
4 years ago
Simplificar expresiones lineales<br>-2+7m-7m+5m​
Helen [10]

Answer:

I am not sure it correct or not but I try to answer

Step-by-step explanation:

0-2+7m-7m+5m=7

8 0
3 years ago
The racetrack is a winding 1/2 mile loop. Anton completes 13 laps in 13 minutes. If his speed is the same for each lap, write a
sergey [27]

Answer:

13÷13=1 so if 13 is lap and 13 is minits then your answer is one.

Step-by-step explanation:

one minute

4 0
3 years ago
Brittany graphs the point (6,3) on a coordinate grid. Which describes where she
Daniel [21]

Answer:

D. 6 units to the right and 3 units up

Step-by-step explanation:

Given

Point (6,3)

Required

Position of the point.

The general format if a coordinated grid is (x,y)

Where x and y represent the x and y axis respectively

The following conditions are to be considered when positioning a point on a coordinate grid.

1. If x is positive, then it points to the right;

2. If x is negative, then it points to the left

3. If y is positive, then it points upwards

4. If y is negative, then it points downwards

Having said this;

By comparison

x = 6 and y = 3

x and y are both positive.

Condition 1 and 3 above are satisfied.

Hence, the grid coordinates is 6 units to the right and 3 units upwards.

Option D is correct and others are incorrect

6 0
4 years ago
Read 2 more answers
Other questions:
  • .
    15·2 answers
  • Justin owns 6 different dress shirts, 3 different pairs of jeans and 5 different ties. How many distinct outfits, each consistin
    14·1 answer
  • Round 833.785 to the nearest hundredth
    11·2 answers
  • What is the square root of 256​
    8·2 answers
  • Evaluate (y - 9) + (3 + x), when y = 15 and x = 5​
    8·1 answer
  • Abcdefghijklmnopqrstuvwxyz
    14·2 answers
  • A woodworker wants to cut a board that is 22.8718 feet long into 7 equal-length pieces
    5·1 answer
  • In the art group, there are 28 children. The ratio of boys to girls is 1:3. How many of the group are boys and how many are girl
    9·2 answers
  • (0.6) with a sqare root of 2
    9·1 answer
  • A number is between 63 and 68 It has prime factors of 2 and 11 whats the number
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!