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djyliett [7]
3 years ago
5

Change each algebraic expression to a verbal expression. 1. A+B = 10 2. 4x - y = a

Mathematics
1 answer:
Darina [25.2K]3 years ago
4 0

Answer:

1. A letter, A, added to a letter, B, equals ten.

2. A letter, x, which is multiplied by 4, then has a number, y, subtracted from it to equal a letter, a.

If you try write these out, I'm sure you'd get the algebraic expression given.

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(3 marks) A certain type of storage battery lasts, on average, 3.0 years with a standard deviation of 0.5 year. The battery live
Ksenya-84 [330]

Answer:

0.8041 = 80.41% probability that a given battery will last between 2.3 and 3.6 years

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

A certain type of storage battery lasts, on average, 3.0 years with a standard deviation of 0.5 year

This means that \mu = 3, \sigma = 0.5

What is the probability that a given battery will last between 2.3 and 3.6 years?

This is the p-value of Z when X = 3.6 subtracted by the p-value of Z when X = 2.3. So

X = 3.6

Z = \frac{X - \mu}{\sigma}

Z = \frac{3.6 - 3}{0.5}

Z = 1.2

Z = 1.2 has a p-value of 0.8849

X = 2.3

Z = \frac{X - \mu}{\sigma}

Z = \frac{2.3 - 3}{0.5}

Z = -1.4

Z = -1.4 has a p-value of 0.0808

0.8849 - 0.0808 = 0.8041

0.8041 = 80.41% probability that a given battery will last between 2.3 and 3.6 years

4 0
2 years ago
the distance from earth to the sun is approximately 93 million miles about how many giga meters is this round to the nearest hun
Alenkinab [10]

Answer: 149.7

Step-by-step explanation:

8 0
2 years ago
What is 39.4x1.7<br> pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
Igoryamba

Answer:

66.98

Step-by-step explanation:

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6 0
2 years ago
Read 2 more answers
HI i'm giving brainiest for the best answer!
Anika [276]

Answer:

p(1/4)40

Step-by-step explanation:

hope this helps^^

7 0
3 years ago
Read 2 more answers
Please help me and pls explain me how u got the answer
Evgesh-ka [11]

Answer: 8.55x10^13

Step-by-step explanation: 1.9 x 4.5 = 8.55  10^10 + 10^3 = 10^13

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3 years ago
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