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3 years ago

Simplify each express 11. b-4c9d6

Mathematics

1 answer:

marshall27 [118]3 years ago

4 0

Look give me ......................... pls

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A jar consists of blue, red and green marbles. The probability of each of them is 2/7 , 3/k and 5/2k. Find the value of k.

jok3333 [9.3K]

Answer:

k = 77/10

Step-by-step explanation:

The jar consist of blue, red and green marbles . The probability of each of them can be described as follows.

probability of blue marbles = 2/7

probability of red marbles = 3/k

probability of green marbles = 5/2k

The sum of the individual probability is equals to 1. Therefore,

2/7 + 3/k + 5/2k = 1

collect like terms

(6 + 5)/2k = 1 - 2/7

11/2k =(7 - 2) /7

11/2k = 5/7

cross multiply

10k = 77

divide both sides by 10

k = 77/10

6 0

3 years ago

I need help asap please

rjkz [21]

Answer:

$x = -\frac{3}{2}$ or $x = 1$

Step-by-step explanation:

Using the zero product property, first step is to set the given equation, $2x^2 + x - 1 = 2$ , to zero. Then factorise the left side.

Thus,

$2x^2 + x - 1 = 2$

Subtract 2 from both sides

$2x^2 + x - 1 - 2 = 2 - 2$

$2x^2 + x - 3 = 0$

Factorise the left side

$2x^2 + 3x - 2x - 3 = 0$

$x(2x + 3) - 1(2x + 3) = 0$

$(x - 1)(2x + 3) = 0$

Find the solution

$x - 1 = 0$

$2x + 3 = 0$

$x = 1$

$2x + 3 = 0$

$2x = -3$

$x = -\frac{3}{2}$

The answer is: $x = 1$ or $x = -\frac{3}{2}$

3 0

3 years ago

Solve for p<br><br> -5(p+3/5)=-4

slavikrds [6]

Answer: I think this is right

Step-by-step explanation:

3 0

3 years ago

3х + бу = 24<br> figure out x and y intercept

____ [38]

Answer:

x int... (8,0)

y int... (0,4)

Step-by-step explanation:

6 0

4 years ago

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It's -25 in Alaska and 75 in Florida. How much hotter is it in Florida than in Alaska?

emmasim [6.3K]

Just subtract to find the difference.

75 - (-25) = 75 + 25 = 100.

It is 100 degrees hotter in florida than alaska.

3 0

3 years ago

Read 2 more answers