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zlopas [31]
3 years ago
14

Simplify the expression. (-2-2i)(-4+6i)

Mathematics
2 answers:
hoa [83]3 years ago
7 0

Answer:

20 - 4i is the correct answer!

Step-by-step explanation:

Snowcat [4.5K]3 years ago
4 0

Answer:

4i*2i (8i)

Step-by-step explanation:

you combine whats in the parenthesis, then multiply the two

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Evaluate x/y for x equals 3/10 and y equals 4/5
Over [174]

Answer:

  x/y = 3/8

Step-by-step explanation:

y = 4/5 = 8/10, so ...

  x/y = (3/10)/(8/10) = 3/8

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One way to divide fractions is to make them have the same denominator. Then their ratio is the ratio of their numerators.

8 0
4 years ago
The ratio of boys to girls in a school is 5:8.If the number of girls exceeds the number of boys by 144, calculate the total numb
True [87]

Answer:

Step-by-step explanation:

624 students

Since they’re only 3 parts more girls then boys and the number equals 144, you just have to divide 144 by 3. You’ll get 48

Multiply 5 and 8 by 48 to get 240 and 384 and add to get 624 which is the answer

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3 years ago
The factors for x2 + 5x + 6 are x + 2 and x + 3.
Nookie1986 [14]
It is true that (x+2)(x+3) = x2 +5x + 6
5 0
3 years ago
Help me plssssss im stuck I will give brainly
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Answer:

Kate.

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
can someone please help me find the surface area of the pyramid with an equilateral triangle for a base
ioda

To obtain the total surface we have to calculate the surface of the 4 triangles and add up the areas (remember that the area of a triangle is (b*h)/2 , b is the base, h is the height ).

We will caculate first the area of the base triangle for that we considerer the fact that it is an equilateral triangle with sides of lenght 6 cm, now we calculate the height, I am going to draw please wait a moment

using the pythagorean theorem we have that

\begin{gathered} h^2=6^2cm^2-3^2\operatorname{cm}=27cm^2 \\ h=\text{ }\sqrt[]{27\text{ }}cm \end{gathered}

Then, the area of the triangle is 6*h/2 = 3h = 15.59 cm^2.

Now we calculate the area of the other 3 triangles, notice that those triangles have the same base and height so we will calculate for one of them and multiply by 3. From the image we know that the height is 15cm and the base is 6 cm so the area is 45cm^2, and 45*3 cm^2 = 135cm^2.

Finally we add up all the areas:

135cm^2+15.59cm^2=150.59cm^2

6 0
1 year ago
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