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2 years ago

The value of Rita’s house increased by 5%.

Mathematics

1 answer:

Svetach [21]2 years ago

6 0

Answer:

200,000

Step-by-step explanation:

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Emily and Kylie are 140 miles apart, traveling towards each other. If Kylie travels 12 mph and Emily travels 8 mph how long unti

Bogdan [553]

Answer: 7 hr

Step-by-step explanation:

Given

Distance between Emily and Kylie is $140\ \text{miles}$

Speed of Emily $v_e=12\ mph$

Speed of Kylie $v_k=8\ mph$

Distance traveled by Emily $\Rightarrow d_e=12t$

Distance traveled by Kylie $\Rightarrow d_k=8t$

$\Rightarrow 12t+8t=140\\\Rightarrow 20t=140\\\Rightarrow t=7\ hr$

They will meet after 7 hour.

3 0

3 years ago

Half the difference of eight times a number and twelve

iris [78.8K]

Answer:

$\frac{8x-12}{2}$

Step-by-step explanation:

4 0

3 years ago

The length of an instant message conversation is normally distributed with a mean of 5 minutes and a standard deviation of 0.7 m

zloy xaker [14]

The probability of the message lasting longer than six minutes is 0.955. I hope this helps!

8 0

2 years ago

Read 2 more answers

Dora calculated the mean absolute deviation for the data set 35, 16, 23, 42, and 19. Her work is shown below.

Crazy boy [7]

Answer:

The calculation in step 3 is wrong

Step-by-step explanation:

1) The mean of a dataset is given by the sum of the values of the dataset divided by the number of values.

In this problem, the dataset is

35, 16, 23, 42, 19

And the number of data is

N = 5

So the mean is

$\bar x=\frac{35+16+23+42+19}{5}=27$

So, step 1 is correct.

The absolute deviation of a value in the dataset is the absolute value of its difference from the mean value:

$\sigma_i = |x_i-\bar x|$

Since here the mean value is

$\bar x=27$

Then for each of the values in this dataset, we have:

$\sigma_{1}=|35-27|=8\\\sigma_{2}=|16-27|=11\\\sigma_{3}=|23-27|=4\\\sigma_{4}=|42-27|=15\\\sigma_{5}=|19-27|=8$

So calculations in step 2 are also correct.

The mean absolute deviation is given by the sum of the absolute deviations for each data divided by the number of values in the dataset.

Therefore in this problem, it is:

$\bar \sigma = \frac{\sum \sigma_i}{N}=\frac{8+11+4+15+8}{5}=9.2$

While the result reported by Dora is 9.5: therefore, this step is not correct.

5 0

3 years ago

Read 2 more answers

Stacy wants to buy some DVDs online. Each DVD costs $9.99 and shipping for the whole order is $7.99. She has no more than $100 t

user100 [1]

Answer:

Step-by-step explanation:

If she buys 10 CDs, it would come out to one hundred. if she bought 9 she would still have enough to pay for shipping

8 0

3 years ago