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3 years ago

Stuck on this too for some reason

Mathematics

2 answers:

kupik [55]3 years ago

8 0

Answer:

y-intercept= 3/5

slope= - (2/5)

Step-by-step explanation:

To do this problem you have to convert standard form into slope-intercept

2x+5y=3---> y= - (2/5)x+3/5

From this, we could refer to the slope-intercept notation...

y=mx+b

m=slope

b=y-intercept

So...

Looking at this we get

y-intercept= 3/5

slope= - (2/5)

Vladimir79 [104]3 years ago

8 0

Y intercept 3/5
Slope -(2/5)

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If a student randomly guesses at 20 multiple-choice questions, find the probability that the student gets exactly four correct.

ad-work [718]

Answer:

Probability = 0.190

Step-by-step explanation:

Given:

Number of questions, 'n' = 20

Each question has four choices.

Let event of choosing correct answer be success and its probability be represented by 'p'.

Therefore, event of choosing wrong answer is failure and its probability be represented by 'q'.

Now, probability of success is choosing one correct answer out of 4 options. So, $p=\frac{1}{4}=0.25$

Now, 'p' and 'q' are complements of each other. Therefore,

$q=1-p=1-0.25=0.75$

Now, we need 4 successes. Therefore, $x=4$

Using Bernoulli's theorem to find 'x' successes from 'n' questions, we get:

$P(x)=_{x}^{n}\textrm{C}p^xq^{n-x}$

Plug in 4 for 'x', 20 for 'n', 0.25 for 'p' and 0.75 for 'q'. Solve.

$P(4)=_{4}^{20}\textrm{C}(0.25)^4(0.75)^{20-4}\\P(4)=_{4}^{20}\textrm{C}(0.25)^4(0.75)^{16}\\P(4)=4845\times (0.25)^4\times (0.65)^{16}\\\\P(4)=0.1896\approx0.190$

Therefore, the probability of getting 4 correct answers out of 20 questions is 0.190.

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2 years ago

The table below shows the distance y, in miles per minute, of a toy car at different times x, in minutes: Time (x) (minutes) 10

Mkey [24]

The answer is -0.04 for part A

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3 years ago

The sum of a number divided by 2 and 7 is equal to 3

n200080 [17]

I would say no but i don't know how to do your problem by how your describing it sorry :(

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2 years ago

Read 2 more answers

*<br>What is the range of f(x) = 3 + 9?<br>

myrzilka [38]

Answer:

{12}

Step-by-step explanation:

Simplify f(x) such that it be f(x) = 12

Please mark for Brainliest!! :D Thanks!!

For more questions or more information, please comment below!

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2 years ago

M=⅗ and y intercept is -6

ladessa [460]

Answer:

y= $\frac{3}{5}x$ -6

Step-by-step explanation:

Remember the slope-intercerpt form

y=mx+b

4 0

2 years ago