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3 years ago

Please help me, i will mark the brainliest pls!

Mathematics

1 answer:

MAVERICK [17]3 years ago

6 0

Answer:

2x9 + 2x3

Step-by-step explanation:

You distribute the 2 to the other terms (9 and 3) in the brackets.

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A bag contains eight yellow marbles, nine green marbles, three purple marbles, and five red marbles. Three marbles are randomly

Gnoma [55]

Answer: Last Option is correct.

Step-by-step explanation:

Since we have given that

Number of yellow marbles = 8

Number of green marbles = 9

Number of purple marbles = 3

Number of red marbles = 5

So,

Probability that there is atmost one purple marble is given by

$P(X=0)+P(X=1)\\\\=\frac{^{22}C_3}{^25C_3}+\frac{^3C_1\times ^{22}C_2}{^25C_3}\\\\=\frac{22\times 21\times 20}{25\times 24\times 23}+3\times \frac{22\times 21}{25\times 24\times 23}\\\\=0.971$

Hence, Last Option is correct.

3 0

3 years ago

Read 2 more answers

15-7times2plus2to the power of 3

Afina-wow [57]

Answers:

15 - 7 x 2 + $2^{3}$

$(11-8)^{2}$ - 2 x 6

39 - $5^{2}$

7 0

4 years ago

If you add 21 to my number and then multiply the result by 3, you will get 84 more than two-thirds of my number. Find my number.

Ksivusya [100]

Based on the calculations, the unknown number is equal to $\frac{-45}{7}$

Let the unknown number be x.

<h3>How to find an unknown number:</h3>

Translate the word problem into an algebraic expression, we have;

Adding 21 to the unknown number:

$21 +x$

Multiplying the result by 3:

$3\times (21+x)$

84 more than two-thirds of the unknown number:

$\frac{2x}{3} +84$

Equating the equations, we have:

$3\times (21+x) = \frac{2x}{3} +84\\\\43+3x=\frac{2x}{3} +84$

Cross-multiplying, we have:

$43+3x=\frac{2x}{3} +84\\\\129+9x=2x+84\\\\9x-2x=84-129\\\\7x=-45\\\\x=\frac{-45}{7}$

Read more on word problems here: brainly.com/question/13170908

5 0

3 years ago

Can somebody give me a PC? I broke my laptop and need a new one. I only have an android 4 phone, and I'm trying to do zoom, so p

7nadin3 [17]

Answer:

could you ask your school for a loner chromebook?

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

Kenneth drove 167.5 miles in 3 7/20 hours. What was his average speed?

worty [1.4K]

167.5 miles/ (3 7/20 hours)= 50 miles/hour.

The correct answer is 50 mph~

6 0

4 years ago