First, you set your problem up like this:
-4x+3=2x-6
add 6 to both sides so it looks like this:
-4x+9=2x
add 4x to both sides so it looks like this:
9=6x
divide 6 from both sides so this is your answer:
1.5=x
Answer:
14 and 8
Step-by-step explanation:
Solution set:
x+y=22
4x=7y
Solving:
4(22-y)=7y
88-4y=7y
88=11y
8=y
8+14=22
Answer: (i think these are right)
experimental: 27.08% theoretical: 50% ?
Answer:
3.98
Step-by-step explanation:
From the above question,
Cost is directly proportional to the Number of pounds
Hence:
C ∝ N
= C = kN
Where k = Proportionality constant
We are told:
Last week, she bought two pounds and paid $7.96,
Hence:
7.96 = 2k
k = 7.96/2
k = 3.98
This week she bought only one half pound and paid $1.99,
1.99 = k × 1/2
k = 1.99/ 1/2
k = 3.98
Hence, the constant rate of proportionality is 3.98
