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2 years ago

6

You select a marble without looking and then put it back. If you do this 5 times, what is the best prediction possible for the n

umber of times you will pick a pink marble? Enter the numerical answer only rounded to the nearest whole number.

1 answer:

alina1380 [7]2 years ago

4 0

Need more context. How many marbles are there in total, how many colours and how many of each colour?

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Determine whether the vectors u and v are parallel, orthogonal, or neither. u = <6, -2>, v = <8, 24>

Leno4ka [110]

Because 6 * 8 + ( - 2 )* 24 = 48 - 48 = 0 , the vectora u and v are orthogonal ;
Two vectors are orthogonal if their dot product is zero.<span />

5 0

3 years ago

While on a walk in the country, you pass a field of goats and chickens. After a quick count, you determine there are 38 heads an

Neko [114]

Answer:there are 16 goats and 22 chickens.

Step-by-step explanation:

Let x represent the number of goats in the field.

Let y represent the number if chicken in the field.

After a quick count, you determine there are 38 heads and 108 feet in the field. A goat has one head. A chicken also has one head. It means that

x + y = 38

A goat has four legs. A chicken has 2 legs. It means that

4x + 2y = 108 - - - - - - - - - - - 1

Substituting x = 38 - y into equation 1, it becomes

4(38 - y) + 2y = 108

152 - 4y + 2y = 108

- 4y + 2y = 108 - 152

- 2y = - 44

y = - 44/ - 2

y = 22

x = 38 - y = 38 - 22

x = 16

8 0

3 years ago

Find the value of x in each case:

kicyunya [14]

I think the value of x is 15

7 0

3 years ago

Read 2 more answers

What shows the correct substitution of the values a,b, and c from the equation 0=-3x^2-2x+6

Arlecino [84]

When dealing with a quadratic equation, you usually assign the following name to the coefficients of the variables:

$ax^2+bx+c=0$

So, $a$ is the coefficient of $x^2$ , $b$ is the coefficient of $x$ and $c$ is the constant term.

In your case, the coefficient of $x^2$ is -3, so $a=-3$

The coefficient of $x$ is -2, so $b = -2$

The constant term is 6, so $c = 6$

7 0

4 years ago

Jasmine is riding on a carousal. She is sitting 9.5 feet from the center and it takes 20 seconds to

rusak2 [61]

Answer:

<em>2.983 </em>ft/sec

Step-by-step explanation:

Given that

Distance between center and Jasmine riding on a carousal = 9.5 feet

Time taken to complete one rotation = 20 seconds

To find:

Jasmine's linear speed = ?

Solution:

Number of revolutions per minute = $\frac{60}{20} = 3$

Formula for linear speed is given as:

$v=\dfrac{2\pi}{60}\cdot r\cdot RPM$

Where $r$ is the radius of circular path and

$RPM$ is the number of revolutions per minute.

$v=\dfrac{2\pi}{60}\times 9.5 \times 3\\\Rightarrow v=\dfrac{\pi}{10}\times9.5 \\\Rightarrow v = \bold{2.983\ ft/sec}$

Therefore, the linear speed is <em>2.983 ft/sec.</em>

5 0

3 years ago