(a). 8x + y = 20, where (b). y = x2 - 2x + 4
So where y is in equation (a), substitute in the value of y in (b).
8x + (x2 - 2x + 4) = 20
8x + (4) = 20
Get rid of the 4 on both sides (since what you do to one side, you must do to the other)
8x + 4 - 4 = 20 - 4
8x = 16
Get rid of the 8 to leave x on its own
8x ÷ 8 = 16 ÷ 8
x = 2
So now that you have x, find y but substituting in the value you just found (2) into one of the starting equations.
8x + y = 20 where x is 2.
8(2) + y = 20
16 + y = 20
Minus 16 from both sides
y = 20 - 16 = 4
So x is 2 and y is 4
Answer:
1) 
2) 
3) 
Step-by-step explanation:
Given the expression we have to simplify the expression
1) 
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Combining like terms, we get
⇒ 
2.) 
⇒ 
⇒
3.) 
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⇒
% means out of 100 so If its 6% that = .06 then just multiply
Answer: 318
Step-by-step explanation:
7 to the 3rd power is 343, 343 minus 25 is 318
Answer:
I think that it is y=15x+35
Step-by-step explanation:
15*x is how many hours and you have to pay $35 regardless to rent the boat
