Just conver them to mproper fraciton
1 and 1/4=1+1/4=4/4+1/4=5/4
5/8+5/4
make bottom numbers same
8
5/4 times 2/2=10/8
5/8+5/4=5/8+10/8=15/8=8/8+7/8=1 and 7/8
Perimeter is 30 units
Semi-perimeter is 15 units
The Area is 39.7 square units
Answer:
x = 5 cos 2t
Step-by-step explanation:
given equation
x'' + 4x = 0 ; x(0) = 5, x'(0) = 0
L{ x'' + 4 x } = 0
L{x''} + 4 L{x} = 0
s² . L(x) - s . x(0) - x'(0) + 4 L{x} = 0
( s² + 4 ). L(x) - 5 s = 0
L(x) =
= cos at
so,
x = 5
x = 5 cos 2t