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UkoKoshka [18]
2 years ago
15

Simplify each expression using the properties of numbers.Show each step

Mathematics
1 answer:
ki77a [65]2 years ago
5 0
1. is 20x + 16

2. is 27z+56
You might be interested in
If f(x) = x2 + 7, what is the value of f(3)?
Mazyrski [523]
Plug in 3 for f(x)
f(3)=(3)²+7
f(3)=9+7
f(3)=16
Hoped this helped!
3 0
3 years ago
PLEASE HELP ME 20 POINTS + BRAINLIEST
nataly862011 [7]

9514 1404 393

Answer:

  (b)  36.56 ft

Step-by-step explanation:

The perimeter is the total of the circumference of a 4 ft circle and two lengths that are 12 ft.

The circumference is given by ...

  C = πd

  C = (3.14)(4 ft) = 12.56 ft

Adding the 24 ft of straight sections, we find the total perimeter to be ...

  P = 12 + 12 + 12.56 = 36.56 . . . feet

8 0
2 years ago
Read 2 more answers
The age at which small breed dogs are fully housebroken follows a Normal distribution with mean ms = 6 months and standard devia
atroni [7]

Answer:

This measure is just 0.17 standard deviations from the mean, so we should not be surprised.

Step-by-step explanation:

Normal probability distribution

When the distribution is normal, we use the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

If the z-score is lower than -2, or higher than 2.5, the score of X is considered unusual.

Subtraction of normal variables:

When we subtract normal variables, the mean is the subtraction of the means, while the standard deviation is the square root of the sum of the variances.

Let xS – xL represent the sampling distribution.

Mean s 6, means L 4. So

\mu = 6 - 4 = 2

Standard deviation s is 2.5, for L is 1.5. So

\sigma = \sqrt{2.5^2+1.5^2} = 2.915

Should we be surprised if the sample mean housebroken age for the small breed dogs is at least 2.5 months more than the sample mean housebroken age for the large breed dogs? Explain your answer.

We have to find the z-score for X = 2.5. So

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

Z = \frac{2.5 - 2}{2.915}

Z = 0.17

This measure is just 0.17 standard deviations from the mean, so we should not be surprised.

7 0
2 years ago
Find an ordered pair (x , y) that is a solution to the equation
Nonamiya [84]
4x+y = 3
if x = 0, y = 3

ordered pair (0,3)
3 0
2 years ago
HELPPPP. EXPLAIN IT IN 2 SENTENCES
schepotkina [342]
B for 8 would be 6.2 
b for 9 would be 7
The b is adding 0.8 each time
Hope this helps!
6 0
3 years ago
Read 2 more answers
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