Write <em>z</em> in polar form:
<em>z</em> = 1 + √3 <em>i</em> = 2 exp(<em>i</em> <em>π</em>/3)
Taking the square root gives two possible complex numbers,
√<em>z</em> = √2 exp(<em>i</em> (<em>π</em>/3 + 2<em>kπ</em>)/2)
with <em>k</em> = 0 and <em>k</em> = 1, so that
√<em>z</em> = √2 exp(<em>i</em> <em>π</em>/6) = √(3/2) + √(1/2) <em>i</em>
and
√<em>z</em> = √2 exp(<em>i</em> 7<em>π</em>/6) = -√(3/2) - √(1/2) <em>i</em>
Answer:
Parentheses are the most common grouping symbol. Brackets and Braces can be used to further group sections of a math expression when parentheses have already been used.
Step-by-step explanation:
Mark me brainliest
Answer:
D=-64
Step-by-step explanation:
-10(d+56)=80
d+56=8
d=8-56
d=-64
Is pretty much the same as before, so without much fuss
a = charges before tax on first city
b = charges before tax on second city
how much is 3.5% of a? (3.5/100) * a, 0.035a.
how much is 7.5% of b? (7.5/100) * b, 0.075b.
the taxes for both cities, summed up to 347.50
so, 0.035a + 0.75b = 347.50
we also know that, whatever "a" may be, the second city charged $500 less, so b = a - 500.
how much did the second city charge? well, b = a - 500.