We know that:
3x + 10y = 7
We also know that:
x - 10y = 29
Which means that:
x = 29 + 10y
If, x = 29 + 10y,
3(29 + 10y) + 10y = 7
3*29 + 30y + 10y = 7
3(20+9) + 40y = 7
60 + 27 + 40y = 7
87 + 40y = 7
40y = 7 - 87
40y= -80
y=(-80)/40
y=-2
Answer y=-2.
If y=-2,
x-10(-2)=29
x+20=29
x=29-20
x=9
Let's see if these results are true:
3(9)+10(-2)=7
27-20=7 (Correct)
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9-10(-2)=29
9+20=29 (Correct)
Answer once again:
y=-2
Answer:
Dream Studio offers music lessons at $12 per lesson. Fox Studio offers music lessons at $9 per lesson. The better deal here would be Fox Studio. This is because Fox Studio offers cheaper lessons. For eight lessons at Dream Studio it costs $96, where as eight lessons at Fox Studio costs only $72.
Explanation:
Step 1 - Find the cost per lesson at Dream Studio
60 / 5 = 12
So, $12 per music lesson at Dream Studio.
Step 2 - Find the cost per lesson at Fox Studio
72 / 8 = 9
So, $9 per music lesson at Fox Studio.
Step 3 - Find out which offers a better deal
•Dream Studio = $96 for eight music lessons
• Fox Studio = $72 for eight music lessons
First you do (2x-5) witch is -3x
Then you 5x times -3x and it will be 12x
Answer:
I think it is the last one
Step-by-step explanatio
