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3 years ago

Please help Combine the like terms to create an equivalent expression. 3y+x-y

Mathematics

2 answers:

AnnZ [28]3 years ago

8 0

I think the answer would be

2y+x

ziro4ka [17]3 years ago

8 0

Answer: 2y+x

Step-by-step explanation:

3y-y=2y and the there's x

so 2y+x

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Anyone know how to solve this?

yuradex [85]

Answer:

Step-by-step explanation:

<h3> $( - \frac{4}{5})^{2}$ </h3><h3> ${( - 1)}^{2} \frac{ {4}^{2} }{ {5}^{2} }$ </h3><h3> $1 \frac{ {4}^{2} }{ {5}^{2} }$ </h3><h3> $\frac{ {4}^{2} }{ {5}^{2} }$ </h3><h3> $\frac{16}{25}$ </h3><h3>Hope it is helpful....</h3>

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3 years ago

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.

6 0

2 years ago

What’s 4 over 5 fraction simplified

Naya [18.7K]

Answer:

It's already simplified to its lowest term so....

3 0

2 years ago

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Um soo they make me do dis but pls help? 14 points

Agata [3.3K]

Answer:

3 more than

Step-by-step explanation:

Hope this correct and Your welcome

7 0

3 years ago

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Find the sum of 6.28x10^3 and 9.5x10^1 in standard form

anyanavicka [17]

Answer:

6.375 x 10^3

Step-by-step explanation:

Topic: Numbers / Conversion to Standard Form

If you would like to understand on this conversion etc, you can check out my Instagram page (learntionary) where I post notes and mathematics tips. Thanks!

3 0

3 years ago