Answer:
-2.7
Step-by-step explanation:
Answer:
The longest sides is 18 m long.
Step-by-step explanation:
Let x meters be the length of the first side.
The length of the second side = x+9 m.
The length of the third = 3x m.
Perimeter = x + 3x + x + 9 = 39
5x + 9 = 39
5x = 30
x = 6 m.
The other 2 sides are 6+9 = 15 m and 3*6 = 18 m.
Answer:
12.8
Step-by-step explanation:
Answer:

Step-by-step explanation:
Using the exact values of the given trig functions, then
sin45° × sin30° × cos60°
=
×
×
= 