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aleksandrvk [35]
3 years ago
9

A minibus sets off at 7.30 am and arrives

Mathematics
1 answer:
olga_2 [115]3 years ago
3 0

Answer:

4 hours and 15 minutes

Step-by-step explanation:

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A recent research study randomly divided participants into groups who were given different levels of Vitamin E to take daily. On
horrorfan [7]

Answer: D. To produce treatment groups with similar characteristics

Step-by-step explanation:

By using randomization in sampling, the Sample would be more representative of the Population it is based off of because different demographic characteristics may be picked.

This leads to a situation where the groups have similar characteristics between themselves thereby making it easier for comparison. For example, Group 1 would have certain types of people that will be represented in Group 2 and Group 3 as well. That way the effects of the drug can be properly studied as it affects different people. For instance, say there are 4 obese people in a sample of 10, instead of group one having all obese people, randomization may be able to give group one, 2 obese people and 2 obese people to group 2 as well. That way when comparing, the effects of the drug on the two groups is easier to be compared because the two groups have similar people.

5 0
3 years ago
!!!EASY!!!!<br> .<br> .<br> !!PLEASE HELP THE IMAGE IS BELOW!!
Mkey [24]

Step-by-step explanation:

The area of triangle =

4*3/2=6

The area of Rectangle=

7*4=28

The total =

28+6=34

6 0
3 years ago
Classify the number as natural, whole, integer, rational, and/or irrational.
Sergio039 [100]
The set of natural numbers is {1, 2, 3, 4, ...} basically positive whole numbers

The set of whole numbers is {0, 1, 2, 3, ...} which is the set of natural numbers with 0 included

The set of integers is {..., -3, -2, -1, 0, 1, 2, 3, ...} consisting of positive and negative whole numbers, plus zero as well

The set of rational numbers is the set of all fractions of the form a/b where b is not equal to zero. Any whole number, natural number, and integer is also a rational number.

If the number cannot be expressed as a rational number, then it is said to be irrational

------------------------------------------------------------------------

With all that in mind, the answers are "integer" and "rational" as you wrote in the comment section above. The value -25 is in the set {..., -3, -2, -1, 0, 1, 2, 3, ...} which is the set of integers. So we can say that -25 is an integer.

-25 is not a whole number based on the definition I wrote above. The set of whole numbers I wrote above does not include any negative values. This is why -25 is not a natural number either.

We can say that -25 is rational since -25 = -25/1 which is a fraction of integers. Since -25 is rational, it cannot be irrational. 
6 0
3 years ago
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Solve for the following system by using Elimination4x-2y=86x+6y=30
Ilia_Sergeevich [38]

System

\begin{gathered} 4x-2y=8 \\ 6x+6y=30 \end{gathered}\begin{gathered} 3(4x-2y)=8 \\ 6x+6y=30 \\  \\ 12x-6y=24 \\ + \\ 6x+6y=30 \\  \\ 12x+6x-6y+6y=24+30 \\ 18x=54 \\ x=3 \end{gathered}

Now, for y

\begin{gathered} 4x-2y=8 \\ -2y=8-4x \\ 2y=4x-8 \\ y=\frac{4x-8}{2} \\ y=\frac{4\cdot3-8}{2} \\ y=\frac{12-8}{2} \\ y=\frac{4}{2} \\ y=2 \end{gathered}

3 0
1 year ago
The table represents a linear equation . which equation correctly uses point(-2,-6) to write the equation of this line in point-
Minchanka [31]

d ...............................................

7 0
3 years ago
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