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valentinak56 [21]
3 years ago
9

Which of the following is a complex number?

Mathematics
2 answers:
Hoochie [10]3 years ago
4 0
The answer is: C, 4+9i
Alex17521 [72]3 years ago
4 0
A complex number has a real part and an imaginary part. The standard form is a + bi, where a is the real part and bi is the imaginary part.
The only choice here that fits that criteria is letter C.
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How to do questions 19 and 20
Alexeev081 [22]

Answer & Step-by-step explanation:

Using the information given in the question we can form the following 3 equations (in the order of the first 3 sentences)

w = 2h (twice the price)

t = h - 4 ($4 less)

3w + 2h + 5t = 136 (total purchasing and cost)

We can solve all 3 equations for h first, by substituting the first two equations, into the third equations w and t

3(2h) + 2h + 5(h-4) = 136

Simplify

6h + 2h + 5h - 20 = 136

13h = 136 + 20

13h = 156

h = 156/13

h = $12

Using this information, we can solve for w and t

w = 2h

w = 2(12)

w = $24

And finally

t = h - 4

t = 12 - 4

t = $8

4 0
3 years ago
4 divided by 57 please help
Basile [38]

Answer:

0.07017

Step-by-step explanation:

6 0
3 years ago
Could you help me quick!?
anastassius [24]

Answer:

1: 5                       2: -70.98  3: C   4:A.     5:A

Step-by-step explanation:

4 0
3 years ago
Ppppppllease help meeeeee :)
nekit [7.7K]
I think is c because you just flipping the the letters and It should be the same answer ...but I’m not sure....
5 0
3 years ago
Read 2 more answers
Simplify (7x+42)/(x^2+13x+42)
Colt1911 [192]
\frac{7x+42}{x^2+13x+42}=  \frac{7(x+6)}{x^2+7x+6x+42}=   \frac{7(x+6)}{x(x+7)+6(x+7)}=  \frac{7(x+6)}{(x+6)(x+7)}=  \frac{7}{x+7}
7 0
3 years ago
Read 2 more answers
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