Add the ratios 3:1 = 4
divide perimeter 128 by 4 = 32
multiply this by each ratio so 3:1 becomes 96length:32width
remember there are two lengths and two widths in the perimeter so divide by 2 to find the length = 48
Answer:
The surface area of the prism is 
Step-by-step explanation:
we know that
The surface area of the triangular prism is equal to

where
B is the area of the triangular face
P is the perimeter of the triangular face
L is the length of the triangular prism
<em>Find the area of the triangular face B</em>

<em>Find the perimeter of the triangular face P</em>

we have

substitute the values

Answer:
0.25 would be 1/4 and 19/20 would be 0.95
Step-by-step explanation:
you can get 19/10 be divideing
and 0.25 by solving
9xy2-6x2y+5x3. Change every sign in the equation as if you were multiplying each part by -1.