Evaluate ab for a = 2 3/4 and b = 4/5
1 answer:
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A suitable graphing caculator gives the result
X = 15 25/39
Y = 7 6/13
Z = 4 4/39
_____
If you want to solve this by hand, you can add 3 times the first equation to the second to get
... 5X -2Z = 70
and 5 times the first equation to the third to get
... 8X -11Z = 80
Then Cramer's Rule tells you the solutions for X and Z are
... X = (-160+770)/(-16+55) = 610/39
... Z = (560 -400)/39 = 160/39
From there, you can substitute into any of the equations to find Y. The first one might be most convenient.
... Y = 19 -X +Z = 19 -(15 25/39) +(4 4/39) = 8 -21/39 = 7 6/13
Answer:
The new cost of tickets after decrease of price at 23 % rate is $ 4.62
Step-by-step explanation:
Given as :
The initial cost of the selling tickets = $ 6
Let The final cost of selling tickets = $ x
The rate of decrease of ticket price = 23 %
Now,
The final cost of tickets = initial cost of tickets × ( 1 - )
or, $ x = $ 6 × ( 1 - )
or, x = $ 6 ×
∴ x = $ 4.62
So decrease price = x = $ 4.62
Hence The new cost of tickets after decrease of price at 23 % rate is $ 4.62 Answer