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2 years ago

Can someone plzzzzz help me!!!

Mathematics

2 answers:

laiz [17]2 years ago

6 0

Answer:

Step-by-step explanation:

suter [353]2 years ago

3 0

Substituting the value of x and y in the equation,

0= -1+(-1)

0= -1-1

0=-2

No it is not a solution.

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I don’t pay attention in class

zvonat [6]

Pay attention then lol.

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3 years ago

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Find the multiplicative inverse of 3 − 2i. Verify that your solution is corect by confirming that the product of

leonid [27]

Answer:

$\frac{3}{13} + \frac{2i}{13}$

Step-by-step explanation:

The multiplicative inverse of a complex number y is the complex number z such that (y)(z) = 1

So for this problem we need to find a number z such that

(3 - 2i) ( z ) = 1

If we take z = $\frac{1}{3-2i}$

We have that

$(3- 2i)\frac{1}{3-2i} = 1$ would be the multiplicative inverse of 3 - 2i

But remember that 2i = √-2 so we can rationalize the denominator of this complex number

$\frac{1}{3-2i } (\frac{3+2i}{3+2i } )=\frac{3+2i}{9-(4i^{2} )} =\frac{3+2i}{9-4(-1)} =\frac{3+2i}{13}$

Thus, the multiplicative inverse would be $\frac{3}{13} + \frac{2i}{13}$

The problem asks us to verify this by multiplying both numbers to see that the answer is 1:

Let's multiplicate this number by 3 - 2i to confirm:

$(3-2i)(\frac{3+2i}{13}) = \frac{9-4i^{2} }{13} =\frac{9-4(-1)}{13}= \frac{9+4}{13} = \frac{13}{13}= 1$

Thus, the number we found is indeed the multiplicative inverse of 3 - 2i

4 0

3 years ago

Pls help and show work I will mark brainliest if correct no spam or else I will report

postnew [5]

Which question? 2 or 3.

5 0

2 years ago

Y=|x−5|+|x+5|, if x>5

Sidana [21]

Hello,

Let me try out the solution for you.

Consider the below scenarios for the equation y = |x+5|-|x-5|

Case 1:

when x more than or equal to 5

then y=(x+5)-(x-5) = 10

hence y=10

Case 2:

when -5<x<5

y=(x+5)-(-(x-5)) = 2x

y=2x so y can take 9 values corresponding to x={-4,-3,-2,-1,0,1,2,3,4}

Case 3:

when x less than or equal to -5

y= -(x+5)-(-(x-5))

y=-10

Hence if we combine all 3 cases we get that y can take total of 11 values.

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3 years ago

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Find the area of the trapezoid. Show your work using First, Next and Last.

slamgirl [31]

Answer:

130

Step-by-step explanation:

the area of the rectangle is 9*10 or 90

the area of the triangles are both 20

90+20+20= 130

6 0

3 years ago