School starts at 8:05 a. m. and ended at 2:40 p. m. The work below shows Erika's calculation of the length of the school day. Which two errors did Erika make?

the answer is 3/2 and for decimal: 1.5

hope i

-lavira: )

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.

except if the answer is in the value of money, then, it will matter. it will have to be $0.40, but i can tell this is not a money question, so .4 should be the right one.