Answer:
How does y vary with x?
This is called direct variation and to find proportionality, we use the formula y/x = K
Step-by-step explanation:
The first table's results would look like:
6:15
12:30
18:45
24:60
30:75
To do these, you divide the y values by the constant to receive x.
If you need more help, you message me :) Good luck with your work!
To solve for the variables y and x we substitute the second equation into the first meaning that y = -x +2 you substitute y for (-x+2)
so
(-x +2) = x +4
add x to both sides
2 = 2x + 4
subtract 4 from both sides
-2 = 2x
divide by 2
-1 = x
now plug x back into the original equation
y = (-1) + 4
y = 3
and
y = -(-1) + 2
y = 1 +2
y = 3
there you have it x = -1 and y = 3
Hope this helps ;)
So, basically we need to find the mean of all the scores
The mean would be the sum of all scores divided by the number of scores
So we have the information that one score is 90, second score is 87 and she what's to have a total score of 92
Given this information, our equation would be 90+87+x divided by 3 = 92
Where x is the unknown value and the score for the third trimester. We divide by three because that's the amount of scores we are given
With our equation, we add 90 and 87 together,which gives us 177
So, now we have 177+x divided by 3=92
We move three to the other side and it by multiply 92
92*3= 276
177+x= 276
We move 177 to the other side as a negative number to get the value of x
276-177 is equal to 99
So, Maggie must score 99 on her next test to get an average of 92
