Answer:
I'm not 100% sure on this but I think it would be C- 8.1
Step-by-step explanation:
Step-by-step explanation:
x = number of novels
y = number of dictionaries
x = 8y
88x + 208y = 13680
now, using the identity of the first equation in the second equation gives us
88(8y) + 208y = 13680
704y + 208y = 13680
912y = 13680
y = 13680/912 = 15
x = 8y = 8×15 = 120
so, there were 120 novels and 15 dictionaries sold.
Answer:
20$ each visit
Step-by-step explanation
Divide 40 by 2 for her 2 visits to the bank
![\frac{40}{2} = 20 \\](https://tex.z-dn.net/?f=%5Cfrac%7B40%7D%7B2%7D%20%3D%2020%20%5C%5C)
<em>Final Answer: </em>![20](https://tex.z-dn.net/?f=20)
Answer: 16 sodas
Step-by-step explanation:
2 sodas | $2.50
4 sodas | $5.00
6 sodas | $7.50
8 sodas | $10.00
10 sodas | $12.50
12 sodas | $15.00
14 sodas | $17.50
16 sodas | $20.00
Answer:
![x=\frac{1}{5}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B1%7D%7B5%7D)
![y = -\frac{1}{15}](https://tex.z-dn.net/?f=y%20%3D%20-%5Cfrac%7B1%7D%7B15%7D)
Step-by-step explanation:
4x - 3y = 1
x + 3y = 0
Req To Solve With Elimination:
Make Them Equal:
-> 4x - 3y = 1
-> 4x + 4 . 3y = 0
Simplify:
-> 4x - 3y = 1
-> 4x + 12y = 0
-> 4x - 4x - 3y - 12y = 1
-> -3y - 12y = 1
-> -15y = 1
-> ![y = -\frac{1}{15}](https://tex.z-dn.net/?f=y%20%3D%20-%5Cfrac%7B1%7D%7B15%7D)
-> ![x+3(-\frac{1}{15} )=0](https://tex.z-dn.net/?f=x%2B3%28-%5Cfrac%7B1%7D%7B15%7D%20%29%3D0)
-> ![x -\frac{1}{5}=0\\](https://tex.z-dn.net/?f=x%20-%5Cfrac%7B1%7D%7B5%7D%3D0%5C%5C)
-> ![x=\frac{1}{5}](https://tex.z-dn.net/?f=x%3D%5Cfrac%7B1%7D%7B5%7D)
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