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3 years ago

BRAINLIESTTTT ASAPPP!!!

Mathematics

1 answer:

zhuklara [117]3 years ago

6 0

Answer:

<u>50</u>

Step-by-step explanation:

<u>Changing into complex form:</u>

(6 + 8i) * (3 - 4i)

= 18 - 24i + 24i - 32 (i^2)

= 18 - 32(-1)

= 18 + 32

= <u>50</u>

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Which of the following Could be used to determine the volume of a sheet of metal 50×34 that had identical squares cut out of the

valentinak56 [21]

Answer:

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Step-by-step explanation:

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2 years ago

I don’t understand this someone pls help me! (Question 10)

Likurg_2 [28]

Answer:

a. f(n) = n(n+1)/2

b. 351

c. 19

d. no; n would not be an integer for f(n) = 17.

Step-by-step explanation:

a. The terms are 1, 3, 6, 10, ...

Each term has the term number added to the previous term. That is, first differences are 3-1 = 2, 6-3 = 3, 10-6 = 4. These differences have a constant difference of 1.

When the 2nd differences are constant, a 2nd degree polynomial can describe the sequence. It is a little bit of trouble to find that polynomial.

For the polynomial ...

$f(n)=an^2+bn+c$

We can substitute values for n and f(n) to get 3 equations in 3 unknowns:

$1=a\cdot1^2+b\cdot1+c\\\\3=a\cdot2^2+b\cdot2+c\\\\6=a\cdot3^2+b\cdot3+c$

Solving these equations by your favorite method gives ...

(a, b, c) = (1/2, 1/2, 0)

That is, the function representing the relationship is ...

f(n) = n(n+1)/2 . . . . the function describing the relationship

b. f(26) = 26(27) = 13(27) = 351 . . . . the number of squares in term 26

c. The number of the term having 190 squares can be found by solving ...

n(n +1)/2 = 190

n(n +1) = 380 = 19(20)

The 19th term will have 190 squares.

d. Terms 5 and 6 are 15 and 21.

17 is not the value of one of the terms in this sequence.

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2 years ago

In a word there are 8 letters. Of them c letters are vowels, and the rest are consonants. What part of all the letters of this w

Lera25 [3.4K]

8 = letter

c = vowels

8 -c = consonants

_____________

c = 3

so, you've got three vowels

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3 years ago

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Lady_Fox [76]

Answer:

Step-by-step explanation:

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3 years ago

Make the b the subject of b2 - 4ac = x

devlian [24]

Solve for b.
b^2= x+4ac
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2 years ago