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Alexxx [7]
3 years ago
12

Calcule as seguintes multiplicações:

Mathematics
1 answer:
dezoksy [38]3 years ago
4 0

Answer:

A. 26i

B. 36i^2 + 60x + 25

C. 64x^2 + 112x + 49

Step-by-step explanation:

To get answer in question A, B, and C, use FOIL method

FOIL Method:

(a + b)(c + d) = ac + ad + bc + bd

(pretend x is i)

Question A:

(6 + 4x)(2 + 3x) \\ 12 + 18x + 8x - 12 \\ 26x

Question B:

(5 + 6x)(5 + 6x) \\ {(5 + 6x)}^{2}  =  {36x}^{2}  + 60x + 25

Question C

(7 + 8x)(7 + 8x) \\ {64x}^{2}  + 112x + 49

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PLEASE HELP !! I'LL GIVE YOU BRAINLIEST !!
GuDViN [60]

Answer:

B

Step-by-step explanation:

tan45° = 10/x

=> 1 = 10/x

=> x = 10

=> y^2 = 10^2 + 10^2 = 200

=> y = 100*sqrt(2)

=> b

5 0
2 years ago
This is a standard deviation contest. You must choose four numbers from the whole numbers 0 to 10 , with repeats allowed. (a) Ch
irina [24]

Answer:

Kindly check explanation

Step-by-step explanation:

Given the following instructions :

Choose 4 numbers from the whole numbers 0 - 10

Note : Repetition is allowed

Choose 4 numbers with the smallest possible standard deviation.

The smallest possible value of standard deviation obtainable is 0;

Hence in other to obtain a standard deviation value of 0, then;

The mean squared deviation value must be zero (0)

Σ(X - mean)^2 = 0

To achieve this, the values of X and the mean must be the same.

Hence all 4 numbers (X) must be the same in other to have a mean value which is equal to X

For instance :

If X = 3, 3, 3, 3 (since Repetition is allowed)

Man value = (3+ 3+ 3+ 3) / 4 = 12 / 4 = 3

Σ(3 - 3)² = 0 for all values of x

√Σ(x - mean)² / n = 0 ; if all values of x are the Same

n = Number of observations

A possible list of values is (3,3,3,3)

4 0
2 years ago
SOMEONE HELP ME PLEASE
Novay_Z [31]
Y - 5 = -1/2(x-1)

hope this helps!
3 0
2 years ago
Given that F(x) = 5x^2-2x+7
tia_tia [17]
Whats the question for this question 
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3 years ago
I keep getting this answer wrong and I only have 3 attempts and I have one more left, I need someone to give me the answer an ex
Gelneren [198K]

Answer:

92

Step-by-step explanation:

angle a and b add up to 180 degrees

4x-20+2x+8=180

add like terms

6x+12=180

x=28

then substitute to get 92

7 0
2 years ago
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