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4 years ago

Simplify the expression. (4 − 4i)(−2 + 5i)

2 answers:

7 0

To simplify multiplying binomials, you can use two equations
4(-2+5i) + -4i(-2+5i)
Simplify - -8+20i +8i -20i²
-20i² + 28i - 8
Hope this helps- Please mark brainliest :)

swat324 years ago

6 0

12 + 28i
is your answer

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HELPPPPPPPPP ASAPPPPPPPP PLSSSS

yanalaym [24]

-1/3(px-2) = 9

ok! so first we want to isolate x.

multiply both sides by -3/1 (this is the reciprocal of -1/3)

(px-2) = -27

px = -27 + 2

px = -25

x = -25/p

hope this helped!

8 0

3 years ago

How many real solutions does the equation 8x^2 − 10x + 15 = 0 have?

Nimfa-mama [501]

Answer:

The correct option is (A) No real solution.

Step-by-step explanation:

The expression provided is a quadratic equation.

$8x^{2}-10x+15=0$

The roots of a quadratic equation are:

$x = \dfrac{ -b \pm \sqrt{b^2 - 4ac}}{ 2a }$

Here,

a = 8

b = -10

c = 15

The conditions to determine real and complex roots are:

If $b^{2}-4ac$ then the quadratic equation has two complex roots.
If $b^{2}-4ac>0$ then the quadratic equation has two real roots.

Compute the value of $b^{2}-4ac$ as follows:

$b^{2}-4ac=(-10)^{2}-(4\times 8\times15)\\\\$

$=100-480\\=-380\\$

The equation has two complex roots.

Thus, the correct option is (A).

8 0

3 years ago

What multiplies to 6 and adds to -5?

cricket20 [7]

-3 and -2 would be the answer I think

8 0

3 years ago

Read 2 more answers

Two times the number of Windows

Lelu [443]

How could you answer with no numbers

7 0

4 years ago

In Metro Vancouver, the proportion of households that were renters in 2011 was 0.34. Imagine you constructed a sampling distribu

GenaCL600 [577]

Answer: $\mu=170\ ;\ \sigma=10.59$

Step-by-step explanation:

Given : The proportion of households that were renters in 2011 : p= 0.34

Sample size : n= 500

The mean and standard deviation for binomial distribution is given by :-

$\mu=np\\\\\sigma=\sqrt{np(1-p)}$

Then , the mean and standard deviation of the given sampling distribution :-

$\mu=500(0.34)=170\\\\\sigma=\sqrt{500(0.34)(1-0.34)}\approx10.59$

6 0

4 years ago