math
posted by
Allison
.
Which equation could be used to find the perimeter of an isosceles triangle, with two sides 13 cm long, a base 10 cm long and a height of 12 cm?
A.
P = (10 × 12) ÷ 2
B.
P = 2 × 13 + 10
C.
P = 13 + 10 + 12
D.
P = 2 × 10 + 13

math 
Ms. Sue
The perimeter is the sum of the three sides.
P = 2 × 13 + 10

math 
ashey
What value of f makes the equation true?
f – 18.4 = 11.8

math 
gayani
6.6 because you have no number for F so you are supposed to do 11.818.4 and that equals 6.6 and 18.46.6=11.8