Answer:
(-16)
Step-by-step explanation:
Let the number = x
11 less than 3 times a number: 3x -11
75 less than the product of minus 1 and the number: (-1)*x - 75 = -x -75
3x - 11 = -x -75
3x -11 +x = -75
4x - 11 = -75
4x = -75 +11
4x = -64
x = -64/4
x = -16
25 000,000/10,000
Cross out equal amounts of 0's from both numbers:
There are 4 0's in 10,000, so remove 4 0's from both numbers to get:
2500/1
Any number over 1 is that number:
2500/1 = 2500
Answer:
18.84 is the answer
Step-by-step explanation:
Can I please be marked as brainlist
Answer:
8 Liters
Step-by-step explanation:
Percentage of Alcohol in water= 2L X 0 =0
Percentage of Alcohol to be added = xL X 0.9 =0.9x
- New Volume =(x+2) Liters
- Desired Concentration = 0.72%
Therefore:
0+0.9x=0.72(x+2)
0.9x=0.72x+1.44
Collect like terms
0.9x-0.72x=1.44
0.18x=1.44
Divide both sides by 1.44
x=8 Liters
Therefore, Shanice must add 8 Liters of 90% alcohol solution to create the desired mixture