In this case just do it left to right, as multiplication comes before addition/subtraction. So 7x3x2+5-3=21x2+5-3=42+5-3=47-3=44=k.
$1.80, because 3/4 is half of 1.5, and $1.80 is one half of $3.60.
The area of a triangle is base x height/2,
so all you have to do is multiply 6x20 to get 120 and then divide that by 2 to get 60 m squared!! :)
Acute angles are angles that measure below 90°, meaning below a right angle.
