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2 years ago

Rewrite in simplest terms: (-8x + 5) - (x – 7)

Mathematics

2 answers:

Ilia_Sergeevich [38]2 years ago

7 0

Answer:

-9x+12

Step-by-step explanation:

(-8x + 5) - (x – 7)

Distribute the minus sign

(-8x + 5) - x + 7

Combine like terms

(-8x -x+ 5+7)

-9x +12

ra1l [238]2 years ago

3 0

Combine like terms. -8x-x=-9x. 5- -7=2. Subtracting a negative is adding the positive version of the number. The answer is -9x+2.

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Step-by-step explanation:

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2 years ago

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2 years ago

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Step-by-step explanation:

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4 0

2 years ago

Read 2 more answers

Maya bought 6 CDs that were each the same price. Including sales tax, she paid a total of $97.20. Of that total, $5.40 was tax.

uysha [10]

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3 years ago

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Suppose I have an urn with 9 balls: 4 green, 3 yellow and 2 white ones. I draw a ball from the urn repeatedly with replacement.

Mrrafil [7]

Answer:

$E(X_n)=\frac{2(n-1)}{27}$

$E(y)=\frac{14}{9}$

Step-by-step explanation:

From the question we are told that:

Sample size n=9

Number of Green $g=4$

Number of yellow $y=4$

Number of white $w=4$

Probability of Green Followed by yellow P(GY) ball

$P(GY)=\frac{4}{9}*\frac{3}{9}$

$P(GY)=\frac{4}{27}$

Generally the equations for when n is even is mathematically given by

$Probability of success P(S)=\frac{4}{27}$

$Probability of Failure P(F)=\frac{27-4}{27}$

$Probability of Failure P(F)=\frac{23}{27}$

Therefore

$E(X_n)=\frac{n}{2}*P$

$E(X_n)=\frac{n}{2}*\frac{4}{27}$

$E(X_n)=\frac{2n}{27}$

Generally the equations for when n is odd is mathematically given by

$\frac{n-1}{2}$

$E(X_n)=\frac{n-1}{2}*\frac{4}{27}$

$E(X_n)=\frac{2(n-1)}{27}$

Probability of drawing white ball

$P(w)=\frac{2}{9}$

Therefore

$E(w)=\frac{1}{p}$

$E(w)=\frac{1}{\frac{2}{9}}$

$E(w)=\frac{9}{2}$

Therefore

$E(y)=[E(w)-1]\frac{4}{9}$

$E(y)=[\frac{9}{2}-1]\frac{4}{9}$

$E(y)=\frac{14}{9}$

5 0

3 years ago

Rewrite in simplest terms: (-8x + 5) - (x – 7)​

Rewrite in simplest terms: (-8x + 5) - (x – 7)