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marissa [1.9K]
3 years ago
9

Help with 13 and 14 please

Mathematics
1 answer:
nika2105 [10]3 years ago
7 0

Answer:

I think the answer to the first question is "B"

and the second one is "D"

Step-by-step explanation:

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What is the answer for 4i over 3+7i
icang [17]

Answer:

see explanation

Step-by-step explanation:

given \frac{4i}{3+7i}

To rationalise multiply the numerator/denominator by the conjugate of the denominator

the conjugate of 3 + 7i is 3 - 7i, hence

\frac{4i(3-7i)}{(3+7i)(3-7i)}

distribute the numerator/denominator

= \frac{12i-28i^2}{9-49i^2}

[ note that i² = - 1 ]

= \frac{12i+28}{9+49}

= \frac{28+12i}{58}

= \frac{28}{58} + \frac{12}{58} i

= \frac{14}{29} + \frac{6}{29} i ← in standard form



6 0
3 years ago
Math HW please help.
Margarita [4]

Answer:

A  x = 3

Step-by-step explanation:

A = ½θR²

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x = √(2Α/θ)

θ = (360 - 60)(π/180) = 5π/3 radians

x = √(2(15π/2) / (5π/3))

x = √(15π(3/5π))

x = √9

x = 3

7 0
3 years ago
Use the diagram to complete the statement.
Dima020 [189]

Answer:

∠FJH ≅ ∠BJA

Step-by-step explanation:

From the image we can see that the only congruent relation ∠FJH has is with ∠BJA which is due to these angles being vertically opposite

So, ∠FJH and ∠BJA are vertically opposite and hence, congruent. We can say that ∠FJH ≅ ∠BJA

4 0
3 years ago
The measure of <ABC is 90 degrees and the measure of <DBC is 33 degrees​
Pavel [41]

Answer:

B.

Step-by-step explanation:

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3 years ago
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3 years ago
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