Let x be the number of mm of pure alcohol to be added:
I will add the mm to express the volume in mm
100mm.(19%) + (100%).x mL = (100 mL+x mL).(40%).
Now right again without the %
100.(0.19) + x.(1) = (100+x).(0.4)
19 + x = = 40 + 04x
x - 0.4x = 40 - 19
0.6 x = 21
x = 21/0.6 and x = 35 mL. This te quantity of pure alcohol should to be added to get a solution at 40%.
Answer:
see explanation
Step-by-step explanation:
note that f ○ g = f(g(x))
To evaluate substitute x = x³ into f(x)
f(g(x)) = f(x³) = 5x³ - 8
In the same way
g ○ f = g(f(x))
To evaluate substitute x = 5x - 8 into g(x)
g(f(x)) = g(5x - 8) = (5x - 8)³
The answer for #8 is C.
7.1 x 7.1 = 50.41
For 10 I can't help you with because there are no answer choices shown on the photo. I would wait for another to help.
Answer:
8
Step-by-step explanation:
8 + 7 = 15
15 ÷ 3 = 5
Slope = 4, y-intercept = (0, 2)
equation: y = 4x + 2
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Answer: y = 4x + 2
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