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garri49 [273]
3 years ago
13

Select the correct answer. Write (21 − 4i) − (16 + 7i) + 28i as a complex number in standard form. A. 5 + 39i B. 5 + 17i C. 5 −

39i D. 5 − 17i
Mathematics
1 answer:
Anastasy [175]3 years ago
8 0

Answer:

<em>b. 5 + 17i</em>

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

It is given that in In triangle STU, u^2=s^2+t^2.

We can see from the triangle and also the given condition that the triangle will be right triangle as it is satisfying the Pythagoras theorem.

(Hyp)^2=(Base)^2+(Perpendicular)^2

that is:

u^{2}=s^{2}+t^{2}

where u is the hypotenuse, s is the base and t is the perpendicular.

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Thus, The measure of angle SUT is equal to 90 degrees.

Hence, option B is correct.

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Step-by-step explanation:

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