Answer:
11.25
Step-by-step explanation:
Answer:
its 4,000
Step-by-step explanation:
because the number behind it is 1 and any number 1-4 thats behind the the number your trying to round is always going to leave it the same, but if the number behind the 4 is 5-9 well then that would make it 5,000
Hope this helps :)
Answer:
x= 33/7 or 4.7
Step-by-step explanation:
We need 500 ml of alcohol mixture and 50 ml of water.
<u>Step-by-step explanation:</u>
The 50% concentration of the final solution is a result of mixing the 55% concentration with water, which is 0% concentration. Multiply the concentration of each liquid times the # of ml you will use, add these and divide by the total ml to get 50%
x = the number of ml of the 55% alcohol mixture
y = the number of ml of water
x + y = 550
Again, the 0 above represents the water which is 0% concentration
= 0.50
0.55 x = 275
x = = 500
plug 500 into the equation x + y = 550
500 + y = 550
y = 50
Use 500 ml of the 55% solution and 50 ml of water.
You can solve this using an easy mathematical proportion:
you know that the car uses 20 gallons of fuel to travel 440 miles, so:
20 gallons : 440 miles = x : 1054 miles
The x is our unknown and stands for the fuel used to travel 1054 miles.
To solve it you should multiply the extreme knowns and then divide the result by the central known.
(20 gallons · 1054 miles) ÷ 440 miles
The unit miles cancel out so you're left with:
(21,080 gallons) ÷ 440 = 47.9 gallons ≈ 48 gallons