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3 years ago

Select all of the expressions that are equivalent to - 2(4 – 3x) + (5x - 2) Mark all that apply.

Mathematics

1 answer:

Natali [406]3 years ago

7 0

I need the answers i don’t know what I’m looking for

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3 years ago

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Devide. (x^3-8x^2+2•(x-3)

Helen [10]

Answer:

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3 years ago

The weights of a certain dog breed are approximately normally distributed with a mean of μ = 55 pounds, and a standard deviation

weqwewe [10]

Answer:

(a)z=-1

(b)48.5 pounds

Step-by-step explanation:

$z-score=\dfrac{x-\mu}{\sigma}$

Given:

Mean, μ = 55 pounds

Standard deviation,σ = 6 pounds.

(a)For a dog that weighs 49 pounds.

x=49 pounds

The z-score

$=\dfrac{49-55}{6}\\=\dfrac{-6}{6}\\\\=-1$

(b)When a dog has a z-score of -1.09

$-1.09=\dfrac{x-55}{6}\\x-55=-6.54\\x=55-6.54\\x=48.46 \approx 48.5$ pounds (to the nearest tenth)$

The weight of a dog with a z-score of -1.09 is 48.5 pounds.

(c)When a dog has a z-score of 1.09

$1.09=\dfrac{x-55}{6}\\x-55=6.54\\x=55+6.54\\x=61.54 \approx 61.5$ pounds (to the nearest tenth)$

The weight of a dog with a z-score of 1.09 is 61.5 pounds.

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3 years ago

(need help asap)

r-ruslan [8.4K]

Step-by-step explanation:

give more points then I will tell

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Yanka [14]

Answer:

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