Plug them in..
1. (7)^2-(-7) = (7)•(7)-(-7)
2. 49-(-7) = 49+7 (if you are subtracting a negative, change the sign to a plus and take out the negative)
3. Add, 56 is your answer
The answer is C because its the only one that makes sense when you see what the question is asking you
Answer:
Elevation in boiling point is mathematically expressed as
ΔTb = Kb X m
where Kb = boiling point elevation constant = 2.53°c/m (for benzene)
m = molality of solution = 3.47 m (given)
∴ ΔTb = 2.53 X 3.47
= 8.779 oC
But, boiling point of benzene = 80.1 oC
∴ Boiling point of solution = 88.879 oC
Now, Depression in freezing point = ΔTf = Kf X m
where, Kf = freezing point depression constant = 5.12°c/m (for benzene)
∴ ΔTf = 5.12 X 3.47
= 17.766 oC
But freezing point of benzene = 5.5 oC
∴ Freezing point of solution = -12.266 oC
Answer:
F(-9) = -5
Step-by-step explanation:
Answer:
the room dimensions that result in a minimum cost for the paint is;
x = 11 ft
y = 11 ft
z = 8.25 ft
Step-by-step explanation:
Shown in the attachment;
