Cos 90° = 1
Step-by-step explanation:
Cos 90° = 1, Because The angles are complements
D/20=20/15
d=400/15
d=80/3
d=26 2/3 miles
Answer:
a=7
Step-by-step explanation:
Given,
6a-7=3a+14
or,6a-3a=14+7
or,3a=21
or,a=7 [ANSWER]
Answer:
A
Step-by-step explanation:
given that y varies directly with x then the equation relating them is
y = kx ← k is the constant of variation
to find k use the given condition y = 2 when x = 10
k =
=
= 
y =
x ← equation of variation
when x = 40, then
y =
× 40 = 8 → A