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3 years ago

Which values of x and y would make the following expression represent a real number? (6 + 3i)(x + yi)

Mathematics

1 answer:

dexar [7]3 years ago

3 0

Answer:

C. x = 6, y = –3

Step-by-step explanation:

I just took the test and got it right :)

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Find the value of x in the isosceles triangle shown below.

joja [24]

Answer: C. 10

Explanation:

Take half right triangle from the isosceles triangle:

We get side lengths:

12/2 = 6, 8, and x

And use Pythagorean’s theorem to find x:

6^2 + 8^2 = x^2
36 + 64 = x^2
100 = x^2
10 = x

7 0

3 years ago

In the Fall STA 2023 Beginning of the Semester Survey, students were asked how many parties they attended every week and how man

algol13

Answer:

A.58.81

Step-by-step explanation:

x = number of parties attended

y = number of text messages sent

The residual is the difference between the actual number of text messages sent (200) and the number of texts predicted by the regression model:

$y=64.96+25.41x\\y=64.96+25.41*3\\y=141.19$

The residual is:

$R=200 - 141.19\\R=58.81$

The answer is alternative A.58.81

7 0

3 years ago

Find the area of the trapozoid.

Bad White [126]

Area =

$\frac{1} {2} \times sum \: of \: parallel \: sides \: \times height$

=》

$\frac{1}{2} \times (6 + 10) \times 5$

=》

$\frac{1}{2} \times 16 \times 5$

=》

$8 \times 5$

=》

$40$

Area = 40 in²

5 0

3 years ago

Read 2 more answers

Please help as soon as possible

Serjik [45]

Answer:

The answer is 17.5

Hope this helps

8 0

3 years ago

Read 2 more answers

Z=7f/r+4 , solve for r

lora16 [44]

Answer:

r = ----------- - 4

Step-by-step explanation:

I will assume that you meant:

z = ------------

r + 4

Solve for r. Start by interchanging z and (r + 4):

r + 4 = -----------

Now subtract 4 from both sides. This isolates r:

r = ----------- - 4

3 0

3 years ago