David recorded his finishing time, in seconds, for each time he ran the 100 m race during one track season. What was the median of his finishing times?11. 9 11.9 12.0 12.1 12.1 12.2 12.3 12.4 12.4
Answers
Answer 1
Answer:
The median is 12.1 because it is the center number in the sequence. This only applies if the numbers are in order from least to greatest, and also if there are a even number of numbers in the sequence you must take the average of the two center ones because there is no center one.
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You justify a step the same way you decided to go through with it:
Remember a rule, axiom, postulate, theorem, or corollary you learned
that says it's a legal thing to do.
Like if you thought of erasing one of the terms in an equation because
that would make the rest of the equation easier to work with, you would
not do that, because no book or teacher ever said that it was legal.
Or if you thought of adding 42 to both sides of an equation, you could
do that, because you learned that "If equals are added to equals, then
the results are equal". Then later, if anybody ever asked you why you
could do that, or asked you to justify your step, you'd tell them the same
statement.
B.) 1
C.) 1/4
D.) 1/2
Answers
1/4 because there is 4 different possible outcomes. a. heads, odd number b .heads, even number c. tails, even number d. tails, odd number
. the easiest way to work this out with a mathematic "Tree Graph". hope I helped :)
. the easiest way to work this out with a mathematic "Tree Graph". hope I helped :)
-1, 2, -4, 8, -16
Answers
This is a geometric sequence, that is, a sequence where each successive integer is a result of multiplying the previous one by a fixed, non-zero number called the common ratio. We need to find which number is the common ratio and then complete the next three terms using that ratio. If we look at the first and second numbers, we need to ask "what can we multiply by -1 to get 2". If it's not obvious to you, try looking at the next two numbers... what can you multiply by 2 to get -4. The answer is -2.
-1 x -2 = 2
2 x -2 = -4
-4 x -2 = 8
etc...
So we need to go to the end of the sequence and find the next three numbers...
-16 x -2 = 32
32 x -2 = -64
-64 x -2 = 128
Next three numbers in the sequence are 32, -64, 128
-1 x -2 = 2
2 x -2 = -4
-4 x -2 = 8
etc...
So we need to go to the end of the sequence and find the next three numbers...
-16 x -2 = 32
32 x -2 = -64
-64 x -2 = 128
Next three numbers in the sequence are 32, -64, 128
Answers
1. We assume, that the number 432 is 100% - because it's the output value of the task.
2. We assume, that x is the value we are looking for.
3. If 432 is 100%, so we can write it down as 432=100%.
4. We know, that x is 45% of the output value, so we can write it down as x=45%.
5. Now we have two simple equations:
1) 432=100%
2) x=45%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
432/x=100%/45%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.
7. Solution for what is 45% of 432
432/x=100/45
(432/x)*x=(100/45)*x - we multiply both sides of the equation by x
432=2.22222222222*x - we divide both sides of the equation by (2.22222222222) to get x
432/2.22222222222=x
194.4=x
x=194.4
now we have:
45% of 432=194.4
2. We assume, that x is the value we are looking for.
3. If 432 is 100%, so we can write it down as 432=100%.
4. We know, that x is 45% of the output value, so we can write it down as x=45%.
5. Now we have two simple equations:
1) 432=100%
2) x=45%
where left sides of both of them have the same units, and both right sides have the same units, so we can do something like that:
432/x=100%/45%
6. Now we just have to solve the simple equation, and we will get the solution we are looking for.
7. Solution for what is 45% of 432
432/x=100/45
(432/x)*x=(100/45)*x - we multiply both sides of the equation by x
432=2.22222222222*x - we divide both sides of the equation by (2.22222222222) to get x
432/2.22222222222=x
194.4=x
x=194.4
now we have:
45% of 432=194.4
answer is 194.4 he\she just explain it
Answers
6x-3y
6(5)-3(-1)
30+3
The answer is 33 hope this helps
6(5)-3(-1)
30+3
The answer is 33 hope this helps
Answers
Refine:
Multiply both sides by 3 :
Refine:
Subtract 15 from both sides:
Divide both side by -2 :
hope this helps!.
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