3 years ago

How do i solve this complex number (-3i)(-5i)(6+i)

1 answer:

5 0

First combine the 3i and 5i. They are multiplied.
3*5 * i*i
i*i = - 1
3*5 = 15
This much is - 15

Now use the distributive law.
-15 * (6 + i)
-90 - 15i

You might be interested in

The area of a rectangular wall of a barn is 153 square feet. Its length is 8 feet longer than the width. Find the length and wid

r-ruslan [8.4K]

Answer and Step-by-step explanation:

Area (A) = 153

Length (l) = 8 + w

Width (w) = w

A = lw

153 = (8 + w)(w)

153 = $w^{2} + 8w$

0 = $w^{2} + 8w$ - 153

$w^{2} -9w + 17w - 153$

(w - 9)(w + 17)

w = 9

w = -17

We can't have a negative length, so we only use 9.

w equals 9.

That means l equals 17 (9 + 8 = 17).

Length = 17

Width = 9

#teamtrees #WAP (Water And Plant)

5 0

3 years ago

In a right triangle, a and b are the lengths of the legs and c is the length of the hypotenuse. If a = 9 yards and b = 40 yards,

Law Incorporation [45]

Answer: 90 yards

Step-by-step explanation: Let me know if you need an explanation.

7 0

3 years ago

Read 2 more answers

A medical student is conducting a study to track boys’ weight from age 5 to age 18. The student graphs some data and determines

katrin2010 [14]

Answer:

A. The increase in the number of pounds a boy gains each year.

Step-by-step explanation:

A medical student is conducting a study to track boys’ weight from age 5 to age 18. The student graphs some data and determines the line of best fit is

y = 1.73x + 80.13 ............ (1)

where x represents the age of the boys and y represents the weight of the boy corresponding to his age.

Therefore, the slope of the equation (1) represents the increase in the number of pounds a boy gains each year. (Answer)

4 0

3 years ago

4 times a number cubed

sergij07 [2.7K]

Answer:

(4n)^3

Step-by-step explanation:

Let n = number

4 times a number

Cubed

(4n)^3

3 0

4 years ago

Write this number in standard form.<br> 1.498 x 10² = [? ]

ch4aika [34]

149.8

hope it helps...!!!

4 0

2 years ago