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Marianna [84]
3 years ago
9

Simplify the expression to a + bi form: (12-6i)-(7+8i) (12−6i)−(7+8i)

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
8 0

Answer:

5-14i

Step-by-step explanation:

(12-6i)-(7+8i)\\\\12-6i-7-8i\\\\5-14i

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3 years ago
Write a formula that can be used to find the area of a sector of a circle explain and justify the formula you wrote
Airida [17]

Answer:

X/360 (r^2)

Step-by-step explanation:

If X is the number of degrees of the sector, then the area will be given by

X/360 *r^2

Where r^2 is the radius of the circle. The denominator of X is 360 because the degrees of a circle add up to 360

For instance, if the sector is half the circle, then we have

180/360 *r^2 (or 0.5(360)*r^2)

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HELP GIVING BRAINLYEST
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Answer:

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Step-by-step explanation:

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3 years ago
Find the product of the sum of 57 and 16 and the difference of 61 and 31​
Sergio039 [100]

Step-by-step explanation:

???

what is the problem ? you don't know how to add, subtract or multiply yet ?

sum of 57 and 16 : 57 + 16 = 73

difference of 61 and 31 : 61 - 31 = 30

the product of the sum and the difference :

73 × 30 = 2190

3 0
2 years ago
What is the y-coordinate of the solution for the system of equations? x−y=−11 y+7=−2x
ICE Princess25 [194]

Answer:

y= 5

Step-by-step explanation:

Given the system of equations:

x-y=-11

y+7=-2x

In order to find the y coordinate of the solution we must first find the solution to this system of equations. We first start by solving one of the given equations and then substitute the answer of that into the second equation and further solve to get the final answers.

x=y=-11

y+7=-2x

y+7=-2x

+ -7

y = -2x - 7

x - y = -11

y = -2x-7

x-(-2x-7)=-11

x--2x=x+2x=3x

3x+7=-11

-7

-11+-7=-18

3x=-18

\div3

-18\div3=-6

x=-6

y=-2x-7

y=(-2)(-6)-7

-2\times-6=12-7=5

y=5

Hope this helps.

7 0
2 years ago
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