5 are gold, and
1
4 are blue. The rest of the beads are red. Which expression gives the closest estimate of the
fraction of red beads Julia has?
Work Shown:
x - xy = z
x*1 - x*y = z
x*(1 - y) = z .... distributive rule in reverse
x = z/(1-y) ..... divide both sides by (1-y)
The distributive rule is a*(b+c) = a*b+a*c. You can also say a*(b-c) = a*b-a*c. In this case, we factored out the common factor x.
Answer: No
Step-by-step explanation:
It isn’t quadratic
The overall increment at the end of the three-year period is 22.5%
The increments are given as:
So, the overall increment is calculated as:
Substitute known values
Express as decimals
Multiply
Express as percentage
Subtract
Approximate
Hence, the overall increment is 22.5%
Read more about percentage change at:
The overall percentage increase is 22.5%.
step-by-step explanation
Percentage increase in the first year=5%
Percentage increase in the second year=9%
Percentage increase in the third year=7%
we have to calculate the overall percentage increase
Let the initial tuition fees be x
tuition fees after three years=
=
The overall percentage increase is 22.5%.