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kompoz [17]
2 years ago
5

Pls help I’ll brainlest and add extra points

Mathematics
1 answer:
Phoenix [80]2 years ago
6 0

Answer:

26. D) $252

27. A) -6.7 + 6.8

Step-by-step explanation:

26. 400 * 0.3 = 120

400 - 120 = 280

280 * 0.1 = 28 (because the 10% is additional, cannot add it to the original 30%)

280 - 28 = 252

27. -4.5 + 4.4 = -0.1

- 6.7 + 6.8 = 0.1

-0.1 + 0.1 = 0

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Solve the equation by completing the square 5x(x+6)=-50
motikmotik
First lets distribute the 5x 
5x^2 + 30x = -50

Lets divide every term by 5 
x^2 + 6x = -10 

To complete the square we have to half the b value, which in this case is 6. Then square it. 
Half of 6 is 3, 3 squared is 9 

Add that to both sides of the equation 
x^2 + 6x + 9 = -1 

Find the binomial squared
(x+3)^2 (If you're wondering how i got that please comment) 

(x+3)^2 = -1 

Take the square root of the equation of both sides
(x+3) = +/- i
x = -3 +/- i
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and 
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3 0
2 years ago
Question: A book contains 10 photograph , some in color and some in black-and-white. Each
padilas [110]

Answer:

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Step-by-step explanation:

8 0
3 years ago
Which polynomial equations have -i as one of their roots?
pochemuha
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8 0
2 years ago
The cumulative distribution function f(x) of a discrete random variable x is given by f(0) =. 30, f(1) =. 70, f(2) =. 90 and f(3
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Correlation between x & y is 0.6125.

In probability theory and statistics, the cumulative distribution function of a real-valued random variable X, or simply the distribution function of X weighted by x, is the probability that X takes a value less than or equal to x.

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Learn more about cumulative distribution here: brainly.com/question/24756209

#SPJ4

7 0
1 year ago
Pls help me 17 points!!!
777dan777 [17]

Answer:

i dont know

Step-by-step explanation:

i really need these pionts im sorry wish you luck

7 0
3 years ago
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