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inna [77]
2 years ago
9

The expression on (3+i)(4+5i) can be written in form a+bi, where a and b are integers. What are the values of a and b? (Show you

r work please)
Mathematics
1 answer:
gregori [183]2 years ago
8 0

(3 + i)(4 + 5i) \\ 12 + 15i + 4i + 5 {i }^{2}  \\ 12 + 19i - 5 \\ 7 + 19i

Therefore, a is 7 aka real part and b is 19 which is imaginary part.

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√20/125 answer in simpleset form<br>​
grigory [225]

Answer:

.4!

Step-by-step explanation:

first you divide 20 by 125 and get .16

then you take the square root of .16 and get .4

4 0
2 years ago
The product of a number and 5 is atleast 45<br> write an equation for that
shtirl [24]

product means multiply, at least means greater than or equal to

The product of a number and 5 is at least 45:  5n ≥ 45

If asked to solve, divide 5 from both sides: n ≥ 9

Answer: 5n ≥ 45

7 0
3 years ago
Read 2 more answers
Question 6 of 37 write the equation in slope-intercept form. what are the slope and y-intercept? –12x + 11y = –8
Eddi Din [679]
Solve for y. Do that by adding the opposite of the x-term, then dividing by the coefficient of y.
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The slope is 12/11.
The y-intercept is -8/11.
8 0
3 years ago
John flips three pennies. (a) amy peeks and sees that the first coin lands heads. What is the probability of getting all heads
Zanzabum

<u>Answer- </u> Probability of getting all heads is 0.25

<u>Solution-</u>

As the outcome of the first experiment is know to be Heads. So the sample space becomes

S = {(H, H, H),(H, H, T),(H, T, H),(H, T , T)}

\left | S \right | = 4

\left | E \right |= Getting \ all \ heads = 1

P(E) = \frac{\left | E \right |}{\left | S \right |} = 0.25


5 0
3 years ago
The computer store by the A computer system at the cost of $574.50 the selling price was first $891 but then the storage adverti
Amanda [17]

Answer:

582.40

Step-by-step explanation:

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2 years ago
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