Answer:
134.62
Step-by-step explanation:
Answer:
74+32x
Step-by-step explanation:
2+8(9+4x)
2+(72+32x)
74+32x
Answer:
Step-by-step explanation:
To add these vectors together, we have to "glue" them together.
Let's call the vector with the length of 2 <em>A </em>and the one with length 4 <em>B.</em>
Imagine you can grab vector A with your hands and move it to the end of B (it would look like the image that's annexed)
Now imagine that we made a triangle from that, what we want to know is the hypotenuse of that triangle!
We know that when we want to find the hypotenuse of a triangle, we can use Pythagoras theorem:
Let's plug in the known values (the length of the vectors) and solve this
Good luck!
Answer:
a) For this case we can use the definition of weighted average given by:
And if we replace the values given we have:
b)
c)
Step-by-step explanation:
Assuming the following question: "One sample has a mean of M=8 and a second sample has a mean of M=16 . The two samples are combined into a single set of scores.
a) What is the mean for the combined set if both of the original samples have n=4 scores
"
For this case we can use the definition of weighted average given by:
And if we replace the values given we have:
b) what is the mean for the combined set if the first sample has n=3 and the second sample has n=5
Using the definition we have:
c) what is the mean for the combined set if the first sample has n=5 and the second sample has n=3
Using the definition we have: