Let a =107° and b=42°;
So cos 107° cos 42° + sin 107° sin 42° = cosa.cos42 + sina.sinb = cos(a-b)
and cos 107° cos 42° + sin 107° sin 42° = cos(107-42) = cos(65°)
Answer:
$25
Step-by-step explanation:
Multiply $20 by 0.25 (which is 25% as a decimal)
$20 x 0.25 = $5
Add $5 to $20 which makes the answer $25
Answer: The answer is 500 hope this helps!
Step-by-step explanation:
Answer:
As many shades 75% will allow. 3/4 6/8, etc
Step-by-step explanation:
Answer:
Figure 1:
Area: 30m^2
Perimeter: 23.6m
Figure 2:
Area: 98.8km^2
Perimeter:56.5km
Step-by-step explanation:
Area is base x height.
To get the perimeter, add up all the sides.
Figure 1:
Area:
6x5=30m^2
Perimeter: 6+5.8+6+5.8=23.6m
Figure 2:
Area:
7.6x13 = 98.8km^2
Perimeter:7.6+15+20+13.9=56.5km
