Answer:
16x-8
Step-by-step explanation:
We need to calculate the total time. We are given two functions that when summed up will give you total time.
X directly varies with y which means as x increases, y also increases. In this case, we represent a constant of proportionality of k.
Applying laws of <span> proportionality,
x =k y
48 = k* 16
k = 3
when y is 5
x = k y
x = 3* 5
x = 15</span>
173
____
4)692
4
___
29
28
____
12
12
____
0
Answer:
Step-by-step explanation: see attachment for solution
4)
I:3x+4y=67
II:5x-y=35
to eliminate y when they are added one of the equations must contain -ay and the other +ay (with a being some number)
in this case we have in I already a positive term and in II a negative, but they have different numbers
by using multiplication (property of equations) we can multiply II by 4 so the negative and positive parts match
II*4: 20x-4y=140
when I and 4*II get added this results in
3x+20x+4y-4y=67+140
23x=207
5)
in this case I and II were added which can be seen in the left side of the equation((3x+4y)+(5x-y)=8x+3y), so to get the right side we have to also add the right sides 67+35=102
so the full equation would be:
8x+3y=102
