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amiechap12
24.07.2019 •
Mathematics
Two cds and 4 cassette tapes xosr a total of $40.00. however, 3cds and 5 casette rapes cost $55.00 find the price of each type of recording
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Ответ:
Let t = the price of cassette tapes
2c+4t=40
3c+5t=55
We could use substitution to solve this system of equations.
2c+4t=40
-2c -2c
4t=40-2c
4
t=10-1/2c
3c + 5(10-0.5c)=55
3c + 50 -2.5c = 55
- 50. -50
0.5c = 5
c = 10
3c + 5t = 55
3(10) + 5t = 55
30 + 5t = 55
-30 -30
5t = 25
t = 5
So, a cd costs $10 and a cassette recording costs $5.
Ответ:
You can solve this using the process of elimination or by using the matrix on a graphing calculator.
Using the matrix, you’ll get x=300 and y=420. They sold 300 children’s tickets and 420 adults.