3 years ago

Which expression is equivalent to 5(2y + 8) − 4y ?

Mathematics

1 answer:

Anna71 [15]3 years ago

5 0

Answer:

I also think its A.

Step-by-step explanation:

10y + 40- 4y

(10y-4y)+40

6y+40

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Twenty percent of the students in a class of 100 are planning to go to graduate school. The standard deviation of this binomial

Mademuasel [1]

Answer: 4

Step-by-step explanation:

For any binomial variable X having parameters n (total number of trials ) and p (probability of getting success in each event), the standard deviation is given by :-

$\sigma=\sqrt{np(1-p)}$

As per given , we have

n= 100 , p= 20%=0.20

Then, the standard deviation of this binomial distribution is :

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Hence, the standard deviation of this binomial distribution is 4.

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4 years ago

Write the following quadratic expression in standard form: ( 2 x − 1 ) ( 3 x − 1 )

jeka94

Answer:

6 $x^{2}$ - 5 $x$ + 1

Step-by-step explanation:

Standard form is: $ax^{2} +bx+x$

To reach that you have to distribute:

(2x - 1) (3x - 1)

2x (3x - 1) = 6 $x^{2}$ - 2 $x$

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

Combine like terms:

6 $x^{2}$ - 5 $x$ + 1

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3 years ago

ice sculpture originally has a height of 74 1/4 inches. The ice sculpture begins to melt and after several hours, the height has

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The height of the sculpture now is 68.8125

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3 years ago

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Step-by-step explanation:

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stepan [7]

Did you not learn to factor?

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3 years ago