Answer:
52.8%
Step-by-step explanation:
The amount of alcohol is:
0.28 (6 pints) + 0.90 (4 pints) = 5.28 pints
So the concentration is:
5.28 pints / 10 pints × 100% = 52.8%.
Answer:
Step-by-step explanation:
Let b represent the number of black
ink pens that John wants to buy.
Let r represent the number of red
ink pens that John wants to buy.
John wishes to buy 20 pens. This would be expressed as
b + r = 20
The store sells black ink pens for $5 and red ink pens for $4. John doesn’t wish to spend more than $92. The inequality to show this information would be expressed as
5b + 4r ≤ 92
Answer:
The numbers 12, 13, 14, and 15.
Step-by-step explanation:
First, set up the equation as follows: x + (x + 1) + (x + 2) + (x + 3) = ??
Plug in the number you're searching for on the right-hand side of the equation: x + (x + 1) + (x + 2) + (x + 3) = 54.
Now, add like numbers and variables together, to get a sum of 4x + 6 = 54.
The next step to finding 'x' is to subtract the 6 on both sides, leaving you with 4x = 48.
Divide that out, and you get x = 12. Plug that number in the equation above, and you should get 12 + (13) + (14) + (15) = 54.
The chance that a random child sleeps with the light on and becomes myopic is 0.2(0.32)=0.064. The chance that a random child does not sleep with the light on and becomes myopic is (0.8)(0.25)=0.2. Both together give a probability of 0.264.
Answer:
75=5*3*5
Step-by-step explanation:
5*3=15
15*5=75
