Answer: -4h + 13
Step-by-step explanation:
(5h + 7) - ( 9h -6) is the same as (5h -9h) ( 7 + 6)
solve for each
5h - 9h = -4h
7+ 6 = 13
-4h + 13
Answer:
- 33 1/3 liters of 30%
- 16 2/3 liters of 45%
Step-by-step explanation:
Let x represent the liters of 45% solution needed. Then the amount of HCl in the mix is ...
0.45x +0.30(50 -x) = 0.35(50)
0.15x = 0.05(50) . . . . . simplify, subtract 0.30(50)
x = (0.05/0.15)(50) = 50/3 = 16 2/3 . . . liters of 45% HCl
33 1/3 liters of 30% and 16 2/3 liters of 45% HCl are needed.
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<em>Comment on the solution</em>
You may notice that the general solution to a mixture problem of this sort is that the fraction of the mix that is the highest contributor is ...
(mix % - low %) / (high % - low %) = (.35 -.30) / (.45 -.30) = .05/.15 = 1/3
Answer:
Radius: 6.5 ft
Circumference: 40.82 ?
Diameter: 13 ?
Area: 132.665 ???
Step-by-step explanation:
Not 100% sure abt the last 3 answers but im like 89% sure
This is easy all you have to do is plug in -3 into x^2
f(-3)=(-3)^2=(-3)(-3)=9
Answer: f(-3)=9 :)
