<span>The given expression is (–1 + i) + (21 + 5i) : It demonstrates the use of the commutative property of addition in the first step of simplifying the expression. The property of commutativity is that the bracket can change its position i.e. (i + 21 )+ (5i-1)</span>
2(p+w)=240
p+w=120
w=120-p, we will use this value for w below...
2(p-w)=210
p-w=105, now use the w from earlier...
p-120+p=105
2p-120=105
2p=225
p=112.5 mph (and wind is 7.5 mph)
1. 10
2. 5√2 in
1. The ratio for a 30-60-90 triangle is x:x√3:2x
x is the shortest leg so 2*x =2*5 = 10
2. the ratio of a 45-45-90 triangle is x:x:x√2
x is one leg so x * √2 = 5*√2 = 5√2
