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3 years ago

Is 4y+4 equivalent to 2y+2

Mathematics

1 answer:

mash [69]3 years ago

6 0

Answer:

Step-by-step explanation:

$4y + 4 = 4 (y + 1)$

$2y+2 = 2 (y + 1 )$

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Rewrite in simplest terms: -0.2t - 5 (-8t + 5)

SVETLANKA909090 [29]

Answer: 40.2t - 25

Step-by-step explanation:

-0.2t - 5 (-8t + 5)

-0.2t + 40t -25

39.8t - 25

6 0

3 years ago

If 17+8 is 25 then is 17+7 24?

disa [49]

Answer:

that's right

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

This is a number greater than one, which can only be divided by itself and one.

matrenka [14]

Answer:

Step-by-step explanation:

Well 7 is the only number that can be divided by itself and 1

6 0

3 years ago

Read 2 more answers

I will mark Brainiest (no links please)

Vera_Pavlovna [14]

Answer:

Step-by-step explanation:

Are the volumes equal? No, so throw out the first and the last one.

Is the volume of the pyramid greater than the volume of prism?

No, so throw out the third one

so by inspection it must be the remaining one

or mathematically

vol pyramid = (1/3)(base)(height)

vol prism = (base)(height)

vol pyramid / vol prism

(1/3)(base)(height) / (base)(height) = 1/3

6 0

3 years ago

a test consists of 10 true false questions to pass a test a student must answer at least six questions correctly if a student gu

Delicious77 [7]

Answer:

$P(X \geq 6) = P(X=6) +P(X=7) +P(X=8) +P(X=9) +P(X=10)$

And using the probability mass function we got:

$P(X=6)=(10C6)(0.5)^6 (1-0.5)^{10-6}=0.205$

$P(X=7)=(10C7)(0.5)^7 (1-0.5)^{10-7}=0.117$

$P(X=8)=(10C8)(0.5)^8 (1-0.5)^{10-8}=0.0439$

$P(X=9)=(10C9)(0.5)^9 (1-0.5)^{10-9}=0.0098$

$P(X=10)=(10C10)(0.5)^{10} (1-0.5)^{10-10}=0.000977$

And adding the values we got:

$P(X\geq 6) = 0.377$

The best answer would be:

D. 0.377

Step-by-step explanation:

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=10, p=0.5)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

For this case in order to pass he needs to answer at leat 6 questions and we can rewrite this:

$P(X \geq 6) = P(X=6) +P(X=7) +P(X=8) +P(X=9) +P(X=10)$

And using the probability mass function we got:

$P(X=6)=(10C6)(0.5)^6 (1-0.5)^{10-6}=0.205$

$P(X=7)=(10C7)(0.5)^7 (1-0.5)^{10-7}=0.117$

$P(X=8)=(10C8)(0.5)^8 (1-0.5)^{10-8}=0.0439$

$P(X=9)=(10C9)(0.5)^9 (1-0.5)^{10-9}=0.0098$

$P(X=10)=(10C10)(0.5)^{10} (1-0.5)^{10-10}=0.000977$

And adding the values we got:

$P(X\geq 6) = 0.377$

The best answer would be:

D. 0.377

8 0

3 years ago