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3 years ago

Help me with this one

Mathematics

2 answers:

professor190 [17]3 years ago

7 0

Y-32+Y(4)
thats the answer

Cloud [144]3 years ago

3 0

The answer would be, y - 32 + 4y

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Help please and thank you: The graph of f x = x2 − 2x − 3 is shown. Which of these describes the effect changing f x to f −2x wi

Lemur [1.5K]

Answer:

Option (C).

Step-by-step explanation:

Graphed function is,

f(x) = x² - 2x - 3

= x² - 2x + 1 - 1 - 3

= (x² - 2x + 1) - 4

= (x - 1)² - 4

f(-2x) = (-2x)² - 2(-2x) - 3

= 4x² + 4x - 3

= 4(x² + x) - 3

= 4[x² + 2(0.5)x + (0.5)²- (0.5)²] -3

= 4(x + 0.5)² - 1 - 3

= 4(x + 0.5)² - 4

= 4[(x - 1) + 1.5]² - 4

Therefore, parent function 'f' will be a horizontal shrink by 4 units and shifted 1.5 units to the left.

Option (C) will be the answer.

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2 years ago

A bag contains 9 marbles: 3 are green, 2 are red, and 4 are blue. Bob chooses a marble at random, and without putting it back, c

kvasek [131]

Answer: 1/18

Step-by-step explanation:

9 total marbles

2 red

so the first time he picks it would be a 2/9 chance of the marble being red

the second time there would be 8 total marbles and 2 red, so it would be a 2/8 or 1/4 chance.

the probability is found by doing 2/9*1/4 which equals 2/36 or 1/18.

8 0

2 years ago

A fair coin is flipped three times. Events A and B are defined as: A: there are at least two consecutive heads somewhere in the

Vaselesa [24]

Answer:

2 / 7

Step-by-step explanation:

Coin flipped 3 times has following outcomes, of heads 'H' & Tails 'T'

HHH , TTT , HTT, THT , TTH , THH , HTH , HHT = total outcomes

P (A) = 2 consecutive heads , P (B) = atleast one tail

P (A) = 2 outcomes ( HHH , HHT , THH ) / total 8 outcomes = 3 / 8

P (B) = 7 outcomes (all except HHH) / total 8 outcomes = 7 / 8

P (A | B) = P ( A ∩ B ) / P (B)

P ( A ∩ B ) = P ( 2 consecutive heads & atleast one tail) / Total outcomes = 2 outcomes ( HHT , THH ) / total 8 outcomes = 2 / 8

So, P (A | B) = ( 2 / 8 ) / ( 7 / 8 ) = 2 / 7

4 0

2 years ago

What is the mean of 5,5, 8,10

TiliK225 [7]

So, when doing this kind of problems, the first thing that we would want to do is to add up (all) the numbers first, and by doing this, it would look like the following:

$5+5+ 8+10=28$

Then, we would then divide it by how many numbers they are.

$\boxed{28\div4} \ =7$

Your answer: 7

7 0

2 years ago

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What is the percent for .3?

STatiana [176]

There are 2 ways to turn a number into a percent...

(1) move the decimal 2 spaces to the right....0.3 = 30%
(2) multiply by 100....0.3 x 100 = 30%

8 0

3 years ago

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