MATHEMATICS HIGH SCHOOL

Multiply and simplify the product.(8 – 5i)2
Select the product.

a. 39

b. 89

c. 39-80i

d. 89-80i

Answers

Answer 1
Answer: Simplifying the square of a complex binomial is done similarly to a purely real binomial, except that one was to remember the relation i² = -1.

Solving the equation (8 – 5i)² is done below:

Rewriting (8 – 5i)²:

(8 - 5i)(8 - 5i) = 64 - 40i - 40i + 25i²

Simplifying and applying i² = -1:
64 - 80i + 25(-1)
64 - 80i - 25
39 - 80i

From the choices, the answer is C. 
Answer 2
Answer:

Answer:

39 – 80i

Step-by-step explanation:

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Combine like terms: 3t + 5 (3 + t) - 2t - 4

Find the value of x    
a. 7x=21
b.9x=-81
c. 88=-11x
d 0.5x=49

Answers

a. x=3 because you divide both by 7
b. x=9 because again you divide both by 9
c. x=8 because you divide both by 11 to isolate the variable
d. x=98 because you divide 49 by .5
a. 7x=21
x=3
b. 9x=-81
x=-9
c. 88=-11x
x=-8
x/2=49
x=98

5a squared + 4ab
I need help with my online homework

Answers

5a^2 + 4ab \n \n gcf = a \n \n a( (5a^2)/(a) + (4ab)/(a) ) \n \n a(5a + 4b) \n \n

The answer is: a(5a + 4b).

Triangle ABC is similar to Triangle DEF, then AB is congruent to DE

Answers

If it's one of those always, sometimes, never questions, then it is sometimes.
Similar triangles have the same angles, but don't necessarily have the same length of sides.

Divide. (4x^3+2x+1)÷(x+1)4x^2−4x+6+5/x+1

4x^2−4x+6−5/x+1

4x^2+4x−6−5/x+1

4x^2+4x+6−5/x+1

Answers

(4x^3+2x+1)/(x+1)=4x^2-4x+6-(5)/(x+1)

Bill has 4 letter blocks: A, B, C and D. In how many different ways can Bill arrange the blocks in a row?

6, 12, 18 or 24?

Answers

The number of different ways can Bill arrange the blocks in a row will be 24. Then the correct option is D.

What are permutation and combination?

A permutation is an act of arranging items or elements in the correct order. Combinations are a way of selecting items or pieces from a group of objects or sets when the order of the components is immaterial.

Bill has 4 letter blocks: A, B, C, and D.

The number of different ways can Bill arrange the blocks in a row will be

⇒ 4!

⇒ 4 x 3 x 2 x 1

⇒ 24

The number of different ways can Bill arrange the blocks in a row will be 24. Then the correct option is D.

More about the permutation and the combination link is given below.

brainly.com/question/11732255

#SPJ2
24 ways in which the blocks can be arranged

True or false?30 is divisible by 2, 4, 5, and 10. hurry please trying to go get my nails done

Answers

Answer:

It's false see 4 cannot go into 30 can I have

brainly?:)

Step-by-step explanation:
30 is not divisible by 4. The answer is false
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