Sin x = cos (90-x)
eg sin 42 = cos(90-42) = cos 48
so the answer is B
1)X×Y that is the equation
Answer:
6 mph
Step-by-step explanation:
Let x mph be the rate of the boat. Going up the river boat has the rate x-2 mph (the current decreases the rate of the boat) and going down the river boat has the rate x+2 mph (the current increases the rate of the boat). Then it will take hours to go up the river and hours to go down the river. Thus,
The rate of the boat cannot be negative, hence, x=6 mph.
Answer:
$0.83
Step-by-step explanation:
$4 = 48x (x = number of text messages)
$4 ÷ 48 = x (divide by 48 on both sides)
0.83 = x