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3 years ago

Simplify -3(2x-3y-5)

Mathematics

1 answer:

Talja [164]3 years ago

5 0

Answer:

simplified-

-6x+9y+15

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What is the answer and work shown for 9r+r+7b+10+b+r+4n

ladessa [460]

Combine like terms
9r+r=10r^2
7b+b=8b^2
10+10r^2+8b^2+4n

7 0

3 years ago

Read 2 more answers

A worker at a landscape design center uses a machine to fill bags with potting soil. Assume that the quantity put in each bag fo

defon

Answer:

a) The expected value is given by:

$E(X) =\frac{a+b}{2}= \frac{10+12}{2}= 11$

The variance is given by:

$Var(X) = \frac{(b-a)^2}{12}= \frac{(12-10)^2}{12}= 0.3333$

And the standard deviation is just the square root of the variance and we got:

$Sd(x) = \sqrt{0.3333}= 0.5774$

b) $P(X$

And we can use the cumulative distribution function given by:

$F(x) = \frac{x-a}{b-a}, a \leq x \leq b$

And using this function we got:

$P(X$

c) $P(X>10.5)$

And using the complement rule and the cumulative distribution function we got:

$P(X>10.5)= 1-P(X$

Step-by-step explanation:

For this case we define the random variable X=quantity put in each bag , and we know that the distribution for X is given by:

$X \sim Unif (a= 10, b =12)$

Part a

The expected value is given by:

$E(X) =\frac{a+b}{2}= \frac{10+12}{2}= 11$

The variance is given by:

$Var(X) = \frac{(b-a)^2}{12}= \frac{(12-10)^2}{12}= 0.3333$

And the standard deviation is just the square root of the variance and we got:

$Sd(x) = \sqrt{0.3333}= 0.5774$

Part b

For this case we want this probability:

$P(X$

And we can use the cumulative distribution function given by:

$F(x) = \frac{x-a}{b-a}, a \leq x \leq b$

And using this function we got:

$P(X$

Part c

For this case we want this probability:

$P(X>10.5)$

And using the complement rule and the cumulative distribution function we got:

$P(X>10.5)= 1-P(X$

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3 years ago

Three more than twice a number is less than negative thirteen. Solve the inequality for the unknown number.

Goshia [24]

Answer:

Step-by-step explanation:

The number = x

Three more than the number = x + 3

twice the number = 2x

which means:

2x + 3 < -13

2x + 3 -3 < -13 -3 (subtract 3 from both sides)

2x < -16

2x/2 < -16/2 (divide 2 from both sides)

x < -8

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2 years ago

Graph f(x) = - 2/3 x -3

Ipatiy [6.2K]

Answer:

-4.5,0

Step-by-step explanation:

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3 years ago

What types of investments are monitored with candlestick charts?

notka56 [123]

Answer:

Candlestick charts graph the high, low, open, and close prices of stocks

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3 years ago