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3 years ago

you choose a marble at random from a bag containing 12 red,12 blue,15 green,9 yellow and 12 black marbles

Mathematics

1 answer:

nirvana33 [79]3 years ago

7 0

Answer:

okay i will pick one red one and i hope this helps lol

Step-by-step explanation:

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1. a^3 – 9a^3 = 2. 10x^2+10-2x+x^4= 3. (6n^4+3)+(2n^3+4)=

Citrus2011 [14]

I don't understand the problem what are you solving for?

5 0

3 years ago

G) (Sin 5A - Sin 7A - Sin 4A + Sin 8A)÷ (Cos 4A - Cos 5A - Cos 8A + Cos 7A)= Cot 6A

RoseWind [281]

We use a similar strategy as in your previous question. Rewrite:

sin(5x) = sin(6x - x) = sin(6x) cos(x) - cos(6x) sin(x)

sin(7x) = sin(6x + x) = sin(6x) cos(x) + cos(6x) sin(x)

→ sin(5x) - sin(7x) = -2 cos(6x) sin(x)

sin(4x) = sin(6x - 2x) = sin(6x) cos(2x) - cos(6x) sin(2x)

sin(8x) = sin(6x + 2x) = sin(6x) cos(2x) + cos(6x) sin(2x)

→ sin(8x) - sin(4x) = 2 cos(6x) sin(2x)

cos(5x) = cos(6x - x) = cos(6x) cos(x) + sin(6x) sin(x)

cos(7x) = cos(6x + x) = cos(6x) cos(x) - sin(6x) sin(x)

→ cos(7x) - cos(5x) = -2 sin(6x) sin(x)

cos(4x) = cos(6x - 2x) = cos(6x) cos(2x) + sin(6x) sin(2x)

cos(8x) = cos(6x + 2x) = cos(6x) cos(2x) - sin(6x) sin(2x)

→ cos(4x) - cos(8x) = 2 sin(6x) sin(2x)

Then

(sin(5x) - sin(7x) - sin(4x) + sin(8x)) / (cos(4x) - cos(5x) - cos(8x) + cos(7x))

= (2 cos(6x) sin(2x) - 2 cos(6x) sin(x)) / (2 sin(6x) sin(2x) - 2 sin(6x) sin(x))

= (2 cos(6x) (sin(2x) - sin(x))) / (2 sin(6x) (sin(2x) - sin(x)))

= cos(6x) / sin(6x)

= cot(6x)

QED

5 0

3 years ago

There are 45 questions on your math exam. You answered 8/

viktelen [127]

You would get 36 correct. This is possible because i multiplied the fraction (8/10) to the total of questions(45)

5 0

3 years ago

Write an equation that represents the line

Anon25 [30]

Answer:

$\large\boxed{y=\dfrac{6}{5}x-5}$

Step-by-step explanation:

The slope0intercept form of an equation of a line:

$y=mx+b$

m - slope

b - y-intercept → (0, b)

The formula of a slope:

$m=\dfrac{y_2-y_1}{x_2-x_1}$

====================================================

From the graph we have two points:

(0, -5) → b = -5

(5, 1)

Calculate the slope:

$m=\dfrac{1-(-5)}{5-0}=\dfrac{1+5}{5}=\dfrac{6}{5}$

Put the value of a slope and of an y-intercept to the equation of a line:

$y=\dfrac{6}{5}x-5$

7 0

3 years ago

A line that passes through the points (-4,10) and (-1,5) can be represent by the equation y=-5/3(x-2). Which equation also repre

ira [324]

If we distributed through the parenthesis we would have $y=- \frac{5}{3}x+ \frac{10}{3}$ . That's choice 2 above. Next thing we could do is to put this into a form that is close to standard form. That means that we lose the denominator of 3 by multiplying everything by 3 to get 3y = -5x + 10, I believe maybe you meant choice 3 to have an x in it. If so, choice 3 works too. Then we will put it into legit standard form and get 5x + 3y = 10, last choice above.

8 0

3 years ago