5x^2 -15x-140
5(x² -(3x) -28)
5(x² +(4x-7x)-28)
5(x(x+4) -7(x+4)
5(x-7)*(x-4)
Area : 14
-you can count the squares in the coordinate plane near the triangle shape
-find the height of the triangle
height : 4
-find the base of the triangle
base: 7
use the triangle formula
1/2bh
and your answer will be 14
( sorry if incorrect, I’m pretty sure it is! )
33%of360=118.8
equation: 33% of 360= 360*33%=118.8
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