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allsm [11]
3 years ago
7

PLEASE HELP (plssssssssssss)

Mathematics
1 answer:
babunello [35]3 years ago
6 0
The value of x=53 <MNQ=147
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Mark is painting a mural. He paints 1/5 wall in 2/3 hour. what is his rate per hour?
Novosadov [1.4K]
For 2/3 hour, he painted = 1/5 wall
For 1 hour it would be: 1/5 / 2/3
 
We can re-write it as: 1/5 * 3/2 = 3/10 wall

So, your final answer is 3/10 wall

Hope it helped.
6 0
4 years ago
In the graph above, what's the distance between (5, –2) and (5, 3)?
SVETLANKA909090 [29]

Answer:

5

Step-by-step explanation:

To find the distance between two points, subtract the two values and find the absolute value. So in this question, our equation would be |-2-3| which equals |-5| which then solves to 5.

8 0
3 years ago
Find an irrational number that is between 5.2 and 5.5
uysha [10]

Answer:

answer is 5.3 cuz I am smart I learned this so I'm here to help

6 0
3 years ago
Read 2 more answers
The mean number of hours per day spent watching television, according to a national survey, is 3.5 hours, with a standard deviat
aleksley [76]

Answer:

4.5 hour and 2 hour

Step-by-step explanation:

Given: The mean number of hours per day spent watching television, according to a national survey, is 3.5 hours, with a standard deviation of two hours.

To Find: If each time was increased by one hour, what would be the new mean and standard deviation.

Solution:

let the total numbers entries of hours in survey be   =   \text{N}

each entry in survey be  =  \text{x}_{i}

mean of survey is     =     \mu  =3.5 \text{hours}

standard deviation is  =   \sigma = 2 \text{hours}

if each entry in survey is increased by one hour then,

each new entry in survey  is =  \text{x}_{i}+1

the new mean is\mu_{new}  = \frac{\text{sum of all hours}}{total number of entries}

                                                \frac{\text{x}_{1} +1+\text{x}_{2}+1 +....+\text{x}_{N}+1 }{N}

                                                \frac{(\text{x}_{1} +\text{x}_{2} +....+\text{x}_{N})+\text{N}\times1 }{N}

                                                \frac{(\text{x}_{1} +\text{x}_{2} +....+\text{x}_{N})}{N}+\frac{\text{N}\times1 }{N}

                                             \mu_{new} = \mu + 1=4.5 \text{hours}

now,

standard deviation is      \sigma_{new}= \sqrt{\sum_{1}^{N}\frac{(\text{x}_{inew}-\mu_{new})^{2}}{N}}

                                   \text{x}_{inew}= \text{x}_{i}+1

                                   \mu_{new}=\mu+1        

putting values,

                                                \sqrt{\sum_{1}^{N}\frac{(\text{x}_{i}+1-\mu-1)^{2}}{N}}

                                                \sqrt{\sum_{1}^{N}\frac{(\text{x}_{i}-\mu)^{2}}{N}}= \sigma

                                 \sigma_{new}        =2

new mean and standard deviation are 4.5 and 2 \text{hours}

                                               

5 0
3 years ago
Which set of numbers represent the lengths of the sides of a right triangle?
inna [77]
The basic deal is a^2 + b^2 = c^2
A= incorrect, 81 + 100 does not equal 121.
B= incorrect, 64 + 144 does not equal 256.
C= incorrect, 256 + 1024 does not equal 1280
This leaves D.

D must be a right triangle.
5 0
3 years ago
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