Seems all good to me at least!
3x - y = 6 ------------ (1)
y = x - 4 ------------ (2)
From (1) + (2) :
( 3x - y) + y = 6 + (x - 4)
3x - y + y = 6 + x - 4
3x = x + 2
2x = 2
x = 1 ------------- Sub into (2)
y = x - 4
y = 1 - 4
y = -3
Answer: x = 1, y = -3
Surface Area of a Right Traingular Prism is = bh + L(S1 + S2 + h)
from the question given
h = 5,
S1 = 12 = b
S2 = 13
L =10
= bh + L(S1 + S2 + h)
= 12(5) + 10(12 + 13 + 5)
= 60 + 10(30)
=60 + 300
=360
From the shape
The Triangle side Area = 1/2 X B X H
=1/2 X12 X 5 = 30
we have two faces of the triangle = 2x 30 = 60
For the Top side = 10 X 13 = 130
for the base/floor = 12 x 10 = 120
for the back end side = 5 x 10 = 50
Total = 60 + 130 + 120 +50
=360
Answer: 5040
Step-by-step explanation:
