Answer:
$14.49
Step-by-step explanation:
Since the question asked you how much you spent on the meal including the 5% tax and the 15% tip after the tax, it's basically asking you to calculate the percentage of the meal and subtracting it by the amount.
20:20 since the number of boy is even to the girls
Answer:
x= 9
y=-12.5
Step-by-step explanation:
3x+2y = 2×2
2x+2y =-7×3
6x+4y =4
- 6×+6y =-21
-2y =25
y=-12,5
2x+2(-12,5)= -7
2x+-25= -7
2x= -7+25
2x/2=18/2
x= 9
To calculate for mass, simply multiply molar weight (MW)
and number of mols. The molar weight (MW) is in units of mg / mmol. Therefore
the mass is:
mass = (158 mg / mmol) (0.25 mmol)
mass = 39.5 mg
Answer:
39.5
