Answer:
Step-by-step explanation:
The point (-30, 10) will from a proportional relationship with the point (60, -20).
A proportional relationship takes the form of y = kx. In other words, we are just multiplying x by a number to change it into y.
In this case, if we multiply x by -1/3 in both situations, we will get the correct y value.
Let S=score on the second exam, then
(67+S+(S+7))/3=84
cross multiply
2S+74=252
2S=178
S=89
So second exam: 89
third exam=89+7=96
Check: (67+89+96)/3=84 ok.
Answer:
f = -
Step-by-step explanation:
Given f varies directly with m then the equation relating them is
f = km ← k is the constant of variation
To find k use the condition f = - 19 when m = 14
- 19 = 14k ( divide both sides by 14 )
- = k
f = - m ← equation of variation
When m = 2 , then
f = - × 2 = -
Then I oppose you do the with during the break then do ten diveided by 6