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4 years ago

Help! I don't know how to do this! I will mark Brainliest!

Mathematics

2 answers:

pshichka [43]4 years ago

8 0

Answer:

is it A?

Step-by-step explanation:

i choose that because its the only one with -3y² which is correct

gogolik [260]4 years ago

4 0

Answer:

- 3y² - 7y + 6

Step-by-step explanation:

Given

(- 3y + 2)(y + 3)

Each term in the second factor is multiplied by each term in the first factor, that is

- 3y (y + 3) + 2(y + 3) ← distribute both parenthesis

= - 3y² - 9y + 2y + 6 ← collect like terms

= - 3y² - 7y + 6

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Multiply (-3/10)(-5/12)

anygoal [31]

I hope this helps you

5 0

3 years ago

Please help !!!!!!!!!!!

DochEvi [55]

Forgive if I'm wrong but I think the answer is D).5.

4 0

4 years ago

N = 12 P = 6 , Find the value of 4N - 3P ÷ p

Oxana [17]

Answer:

The value of this expression is 45

6 0

2 years ago

Whats 2/5 times 6/7 simplified

hichkok12 [17]

In order to multiply fractions, we multiply the two numerators together, and multiply the two denominators together.

$\frac{2}{5}\times \frac{6}{7} =\frac{2\times6}{5\times7} \\\frac{2\times6}{5\times7} =\frac{12}{35}$

12/35 is the answer

8 0

4 years ago

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:

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

3 0

4 years ago