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Lynna [10]
1 year ago
6

Rosa ran the hurdles in 58.32 seconds. maya ran the hurdles in 54.078 seconds. what is the difference between the two times? 3.9

54 seconds 4.242 seconds 4.258 seconds 5.758 seconds
Mathematics
1 answer:
satela [25.4K]1 year ago
5 0

Answer:

Step-by-step explanation: 4.242

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Convert the following in standard form : -4x=4y-52
goldenfox [79]
The standard form of any linear equation with two variables is ax+by=c, where a, b, and c are constants. To convert this equation to standard form, simply subtract 4y from both sides to get

-4x-4y=-52

We could leave it in this form, though, in this case, it might be better at if we multiplied both sides by -1 to get

4x+4y=52
8 0
3 years ago
Perfect square numbers
Softa [21]

Answer:

All the sides are equal. any number as long as all the sides have the same number.

Step-by-step explanation:

4 0
3 years ago
Final exam scores are normally distributed with a mean of 74 and a standard deviation of 6. Approximately, what percentage of fi
notka56 [123]

Answer:

81.86%

Step-by-step explanation:

We have been given that final exam scores are normally distributed with a mean of 74 and a standard deviation of 6.

First of all we will find z-score using z-score formula.

z=\frac{x-\mu}{\sigma}

z=\frac{68-74}{6}

z=\frac{-6}{6}=-1

Now let us find z-score for 86.

z=\frac{86-74}{6}    

z=\frac{12}{6}=2        

Now we will find P(-1<Z) which is probability that a random score would be greater than 68. We will find P(2>Z) which is probability that a random score would be less than 86.

Using normal distribution table we will get,    

P(-1

P(2>Z)=.97725  

We will use formula P(a to find the probability to find that a normal variable lies between two values.

Upon substituting our given values in above formula we will get,

P(-1

P(-1

Upon converting 0.81859 to percentage we will get

0.81859*100=81.859\approx 81.86

Therefore, 81.86% of final exam score will be between 68 and 86.  


3 0
3 years ago
Help me please!! <br> Also explain you answer since this is a study guide for a important test!!
il63 [147K]

Answer:

<h3><em>the </em><em>answer</em><em> </em><em>is </em><em>A</em></h3>

Step-by-step explanation:

8x+6is equivalent to-7(1-x)+x+13 because

-7(1-x)+x+13

we use-7to multiply the numbers in the bracket which is equal to -7+7x(minus ❌times minus =+)

-7+7x+x+13

collect like terms

7x+x+13-7=8x+6

answer is A

6 0
2 years ago
Read 2 more answers
I NEED HELP ASAP!!!!!!! please ACTUALLY answer
goldfiish [28.3K]

Answer:

4:3

Step-by-step explanation:

4 0
3 years ago
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