Answer:
(x + 2)² = 16
Step-by-step explanation:
Given
x² + 4x = 12
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(2)x + 4 = 12 + 4, that is
(x + 2)² = 16
Answer: Forgot to divide at the end
Step-by-step explanation:
To figure out your friend's error, solve the equation yourself.
- Distribute the 5 to get 25x+30
- Combine like terms in the first equation toget 25x-3=25x+30
- Add 3 to the other side.
When we do this, we realize adding 3 would make it 33. This shows that the friend likely forgot to divide by 25 to completely isolate x, and stopped at that step.
Answer:
Answer:
18 cups.
Step-by-step explanation:
We are given that Bernie spends $6.50 on ingredients and cups for his lemonade stand. He charges $1.50 for each cup of lemonade. Inequality that represents this situation: .
To find number of cups x to make a profit of at least $20 we will use our given inequality.
Therefore, in order to make a profit of at least $20 Bernie need to sell 18 cups of lemonade.
Ratio in the first sample = 250/1000 = 1/4 = 0.25
ratio in the second sample = 750/2000 = 0.375
hence ,<span> there is a greater proportion of smokers in the second city than in the first.
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hope this helps!!
Answer:
0.05x + 0.10y = 34.40
x + y = 468
Step-by-step explanation:
