Ratna wants to pay stone in his triangular ad of size 50cm, 50cm and 60cm is the area of each stones is on a 20CM² find the total number of stones required for it also calculate the total cost at the rate of Rs 5 per stone​

y=x+9

?

step-by-step explanation:

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.

c 5 gallons mark me as brainlest