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2 years ago

Is -3x + -x - 2x equivalent is 7x - 8 + 3x - 4x - 8

Mathematics

1 answer:

kolezko [41]2 years ago

5 0

Answer:

No just no

Step-by-step explanation:

3x + -x -2x = 0

7x - 8 + 3x - 4x - 8 = 6x - 16

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What is the solution to the system of equations

irinina [24]

Answer:

O A. $(-1,2)$

Step-by-step explanation:

$y=x+3$

$2=-1+3$

$2=2$

$y=-x+1$

$2=-1+1$ Since two -x's are being used, x becomes positive!

2 = 1 + 1

2 = 2

Solution: (-1, 2)

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3 years ago

What is the smallest prime factor of 11^7 +7^5?

abruzzese [7]

Answer:

3 is the smallest prime factor.

Step-by-step explanation:

ionk how to explain it but trust me its right.

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2 years ago

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sveta [45]

Answer: They will need 42 beads

Step-by-step explanation:

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3 years ago

Read 2 more answers

Is this relation a function? justify your answer

lara31 [8.8K]

Answer: No C

Step-by-step explanation:

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Using a straight line test, a straight line can be drawn vertically on the x axis point of 4.

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3 years ago

A fair four-sided die has two faces numbered 0 and two faces numbered 2. Another fair four-sided die has its faces numbered 0, 1

Mandarinka [93]

The two dice have PMFs

$P(X=x)=\begin{cases}\dfrac12&\text{for }x\in\{0,2\}\\\\0&\text{otherwise}\end{cases}$

$P(Y=y)=\begin{cases}\dfrac14&\text{for }y\in\{0,1,4,5\}\\\\0&\text{otherwise}\end{cases}$

The sum of the two rolls can take on 8 different values:

$W=\begin{cases}0&\text{if }x=0,y=0\\1&\text{if }x=0,y=1\\2&\text{if }x=2,y=0\\3&\text{if }x=2,y=1\\4&\text{if }x=0,y=4\\5&\text{if }x=0,y=5\\6&\text{if }x=2,y=4\\7&\text{if }x=2,y=5\end{cases}$

The outcome of either roll is independent of the other, so that

$P(X=x\text{ and }Y=y)=P(X=x)P(Y=y)$

a. Then PMF of $W$ is

$P(W=w)=\begin{cases}\dfrac12\cdot\dfrac14=\dfrac18&\text{for }w\in\{0,1,2,3,4,5,6,7\}\\\\0&\text{otherwise}\end{cases}$

b. The histogram is nothing special, same as the discrete uniform distribution over the interval [0, 7].

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4 years ago