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Mkey [24]
3 years ago
6

I need help on 1 and 3 please and thank you

Mathematics
1 answer:
aniked [119]3 years ago
3 0
For the first one it is D
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What of the following complex numbers is equivalent to?
PtichkaEL [24]

Answer:

 (3 - 5i)/  (8+2i)

multiply numerator and denominator  by (8-2i) (conjugate of (8+2i))

(3 - 5i) x (8-2i)/  (8+2i)x(8-2i)

24 - 6i -40i +  (5i)x(2i) /  64 -16i +16i -(2i)(2i)

24 - 46i + 10i^2 / 64 -4i^2

24 - 46i +10(-1) / 64 -4(-1)

Note:

i =sqrt(-1)

Get both side power of 2

i ^2=(sqrt(-1))^2

     = -1

24 - 46i -10 / 64 +4

14 - 46i / 68

simplify;

14/68 - 46i/68

7/34 - 23i/34

Step-by-step explanation:

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3 years ago
If 15% of the customer's total is $22.05, then the customer's total is _______."
avanturin [10]

let's say is "x", so "x" is then 100% of the whole bill.

we know 15% is 22.05, what is "x"?

\bf \begin{array}{ccll} amount&\%\\ \cline{1-2} 22.05&15\\ x&100 \end{array}\implies \cfrac{22.05}{x}=\cfrac{15}{100}\implies 2205=15x \\\\\\ \cfrac{2205}{15}=x\implies 147=x

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3 years ago
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PLEASE HELP I DONT UNDERSTAND IT EXPLAIN YOUR ANSWER THO <br><br><br><br> WOULD IT BE 5
BlackZzzverrR [31]

Answer:

That is correct, The answer IS 5. Good job

Step-by-step explanation:

I know how A.P.E.X can be confusing, but keep trying!

I believe the answer is 5 because that has to add up to 30 because it is a triangle.

<u><em>PLEASE MARK BRAINLIEST</em></u>

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3 years ago
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3 5 of the first group are right-handed. 80% of the second group are right-handed. What fraction of the class is right-handed?
STatiana [176]
4/5 is right handed in the second group
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What is the probability of an outcome greater than 2?
nata0808 [166]
Between and including 0 and 1. values can not be negative or greater than one.

3 0
3 years ago
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