Answer:
is b
Step-by-step explanation: because x-4y
(30×6=180)+(30×6=180)×6×4=24+180+180=384
Π=180º
Cos(19π/6)=cos(19*180º/6)=cos (570º)=cos(210º+360º)=cos(210º)=
=-cos 30º=-√3 / 2≈-0.866...
Answer: cos(19π/6)=-cos 30º=-√3/2
Answer:
8x^2 + 34; 45.52 centimeters
Step-by-step explanation:
The perimeter is twice the sum of adjacent edges of a rectangle:
P = 2((2x^2 +9) +(2x^2 +8)) = 2(4x^2 +17)
P = 8x^2 +34
Then when x=1.2, the perimeter is ...
P = 8(1.2^2) +34 = 8·1.44 +34 = 45.52 . . . . cm
A/5+3=8
a+15=40
a=25
3b/7-1=5
3b-7=35
3b=42
b=14
