The answer is the first one; it is an arithmetic sequence with a common difference of -40.
Answer:
Step-by-step explanation:
y*1/x
y=k/x where k is the constant of variation
when y=7, x=-4
7=k/-4
k=-28
when x=5
y=-28/5
note: * is used as symbol of variation
2a
3c
4b
Cross multiply for 2
Put 4x-5=3x-10 and subtract 3 on both sides. After that add 10 to both sides for 3
Divide everything by 5 and multiply everything by -2 for 4
18a+9b you just add the variables together
