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Natali5045456 [20]
2 years ago
9

What is the product (1 – 6i) (-5 – 8i) ? PLEASE HELP QUICK!!!!!f

Mathematics
1 answer:
Svetlanka [38]2 years ago
3 0

Answer:

-53+22i

Step-by-step explanation:

You can simply use the FOIL method, but keep in mind that i^2=-1:

(1-6i)(-5-8i)\\(1)(-5)+(1)(-8i)+(-6i)(-5)+(-6i)(-8i)\\-5-8i+30i+48i^2\\-5+22i+48(-1)\\-5+22i-48\\-53+22i

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Find the center, vertices, and foci of the ellipse with equation x squared divided by 400 plus y squared divided by 625 = 1
Inessa05 [86]

Answer:

x^2/400 + x^2/625

(x-0)^2/400) +(y-0^2/625)

x^2=400

X=sqrt. 400

x = 20

y^2=625

y = sqrt. 625

y= 25

a^2-c^2=b^2

sqrt 400-625 = c

20-25=c

The correct answer is c=-5

(-5,0)

(5,0)

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
A sequence is defined recursively by the formula f(n+1) =f(n) + 3 the first term of the sequences is -4 what is the next term in
MArishka [77]
-1 would be your answer. f(0) = -4. f(1) = f(0)+3 so f(1) = -1
8 0
3 years ago
2/3q = 1/2 what does q equal as a decimal
goldfiish [28.3K]
Is that 2/3 of q or 2 over 3q?
for 2/3 of q. q=1/2 x 3/2 =3/4=0.75

for 2 over 3q q = 2 x 2/3= 4/3=1.3333
3 0
3 years ago
Does anyone know the answer?
Alexxandr [17]

Hello from MrBillDoesMath!

Answer:

88

Discussion:

Angle Q is an inscribed angle so

    measure angle Q = 44  =

                      (1/2) measure of intercepted arc.

In other words,

44 = 1/2 mST               =>   multiply both sides by 2

m ST = 44*2 = 88

which is the second choice

Thank you,

MrB

5 0
3 years ago
Can somebody please help me with these two questions?
Mekhanik [1.2K]

Problem 3

This is not an exponential function. If you were to graph this out, you would see a parabola forming. Or at the very least, a parabolic-like curve forms. An exponential curve only increases or only decreases for the entire domain. However, in this case, we have an increasing portion, and then it decreases.

---------------------------------------------------------------------

Problem 4

This is an exponential function. Each time x increases by 1, y is multiplied by 4. The equation that models these points is y = 4^x. Note how the function is strictly increasing and there are no decreasing portions mixed in.

6 0
4 years ago
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