Answer:
B 4
Step-by-step explanation:
She bought 2 jackets
Jackets = 2*49 = 98
She bought 3 sweaters
Sweaters = 3 * 25 = 75
The costs for the jackets and sweaters is 98+75 =173
She spent a total of 185
185-173 = 12
She spent 12 dollars on socks
Socks are 3 dollars each
12/3 = 4
She bought 4 pairs of socks
Superman is my favorite super hero
The answer is: [A]: " 18 " .
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47 - 29 = 18 .
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Answer:
Cartesian
z₁= 3 +4*j
z₂= 2 +3*j
Polar
z₁=5 * e^ (0.927*j)
z₁=√13 * e^ (0.982*j)
Step-by-step explanation:
for the complex numbers z the cartesian form of is
z= x + y*j
then
1) z₁= 3 +4*j (cartesian form)
2) z₂= 2 +3*j (cartesian form)
the polar form is
z= r* e^jθ
where
r= √(x²+y²) → r₁ = √(3²+4²) = 5 , r₂ = √(2²+3²) = √13
and
θ = tan⁻¹ (y/x) → θ₁ = tan⁻¹ (4/3)= 0.927 rad , θ₂ = tan⁻¹ (3/2)= 0.982 rad
then
z₁=5 * e^ (0.927*j)
z₁=√13 * e^ (0.982*j)
3.0485e+18. That is the answer
