From Monday through Friday, Sydney works in the bookstore on 1 day and in the athletic Center Un another day. On Saturday and Sunday, Sydney cleans bathrooms 50% of the days. How many days
does Sydney work in a week? What percent of Monday through Friday does Sydney work?
Sydney works day(s) each week and % of the 5 days from Monday through Friday.

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

the answer is z7+8/5

answer: c

substitute in the values.

for a:

f(0) = 0 + 9

f(0) = 9

a is a solution.

for b:

f(7) = 14 + 9

f(7) = 23

b is a solution.

for c:

f (3) = 6 + 9

f(3) = 15

c is not a solution. it's supposed to be 14.

for d:

f(2) = 4 + 9

f(2)= 13

d is a solution.