Answer:
Not valid
Step-by-step explanation:
Because 12 is minor than 15
Answer:
dont mind me
Step-by-step explanation:
Answer:
$2.50
Step-by-step explanation:45% of 6 , so if your increasing it by said % than is will equal out to $8.50, making his profit $2.50
Answer:
A 50% increase followed by a 33/1/3% decrease. = ? (1 + 0.5)*(1 - 0.3333333) = 1.5 * 0.666667 = 1. Result is same as original.
-8c means -8 times c. The c is a placeholder for a number. Think of it as a box that holds the number.
The value that goes in the box is 5 because -8 times 5 = -40. We can find this through trial and error. Or the best way is to divide both sides by -8. Why divide? Because we want to undo what is happening to the variable to isolate it.
So divide both sides by -8 to get...
-40 = -8*c
-40/(-8) = -8*c/(-8)
5 = c
c = 5
And as a check, we can plug this value of c back into the original equation
-40 = -8*c
-40 = -8*5
-40 = -40
so the answer checks out