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3 years ago

I NEED HELP ASAP. (WORTH 50 POINTS)

Mathematics

2 answers:

igomit [66]3 years ago

6 0

Y - 4 = -x
y = -x + 4
f(-3) = -(-3) + 4 = 7
x = -3

seraphim [82]3 years ago

5 0

Answer:

6 right?

Step-by-step explanation:

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Anna71 [15]

In math, "of" usually means "times".

2/3 x 3/4 = 6/12 = <em>1/2 pound</em>.

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3 years ago

What's 1+1!!!!!! hdhddvsgsgdvvdndbdvdbdbdbdvdbddgdbdvdhdvd pleaseeee

Vlad1618 [11]

Answer:

Step-by-step explanation:

okay so imagine this, you have one cookie and you get another cookie. how many cookies do you have now? 2

6 0

3 years ago

Read 2 more answers

s) An e-mail lter is planned to separate valid e-mails from spam. The word free occurs in 50% of the spam messages and only 3% o

balu736 [363]

Answer:

A) P(F) = 0.124

B) P(S|F) = 0.8065

C) P(V|F^(c)) = 0.886

Step-by-step explanation:

Let us denote as follows;

F = Message contains word free

S = message is spam

V = message is valid

From the question, we are given that;

The probability that word free occurs in spam messages;P(F|S) = 50% = 0.5

The probability of the valid messages that contain free; P(F|V) = 3% = 0.03

Spam messages; P(S) = 20% = 0.2

Valid messages; P(V) = 1 - 0.2 = 0.8

A) From rule of total probability ;

probability that the message contains the word free is given as;

P(F) = P(F|S)•P(S) + P(F|V)•P(V)

P(F) = (0.5 x 0.2) + (0.03 x 0.8)

P(F) = 0.124

B) From Baye's theorem;

probability that the message is spam given that it contains free is given as;

P(S|F) = P(F|S)•P(S)/P(F)

P(S|F) = (0.5 x 0.2)/0.124

P(S|F) = 0.8065

C) From combination of complement rule and Baye's theorem;

probability that the message is valid given that it does not contain free is given as;

P(V|F^(c)) = P(F^(c)|V)•P(V)/P(F^(c))

Thus,

P(V|F^(c)) = [(1 - P(F|V))•P(V)]/(1 - P(F))

P(V|F^(c)) = ((1 - 0.03)•0.8)/(1 - 0.124)

P(V|F^(c)) = 0.776/0.876

P(V|F^(c)) = 0.886

5 0

4 years ago

Seven bicycles are produced each hour. Write an equation for the relationship. If Speedy Bike works produced 560 bicycles, how m

fiasKO [112]

Answer:

Step-by-step explanation:

it will take 70 days because 560 divided by 8 =70.

6 0

3 years ago

Can someone please help me do this ?

Ymorist [56]

9514 1404 393

Answer:

√(2x -1) = 2x -7

Step-by-step explanation:

It helps to have a general idea of the shape of the square root curve. The coefficient 'a' will compress it horizontally by that factor, and the constant 'b' will add a left shift.

To make the equation have only one solution, the line must intersect the curve in only one place. That is, its slope must be sufficiently steep if it is positive, or must be negative. The y-intercept must be chosen so the line will intersect the square root curve.

It can work well in this case to decide what the point of intersection will be before you finish writing the equation.

Suppose we choose a=2 and b=-1 to create a square root curve that starts to the right of the y-axis and opens to the right. (The "left shift" is negative.) For these values, we will get an integer solution when 2x-1 is an odd square. That is, suitable x-values could be 1, 5, 13, 25, and corresponding y-values would be 1, 3, 5, 7.

Any line that passes through any of these points, but does not cross the square root curve again, will do. The one I proposed in the attachment goes through the point (5, 3) and has a slope of 2. (c=2, d=-7)

With these values, the equation becomes ...

√(2x -1) = 2x -7

and has the solution (x, y) = (5, 3). Solved in the conventional way, one would also see the extraneous solution (2.5, -2).

3 0

3 years ago