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Answer:</h2><h2>
Misty needs 27.13 ounces of 72% acid and 57.87% of 25% acid solution.</h2>
Step-by-step explanation:
85 ounces of 40% acid solution = 85 (0.4) = 34
Also, x + y = 85 ... (1)
0.72x + 0.25y = 34
72x + 25y = 3400 ...(2)
multiply eq (1) by 25, we get 25x + 25y = 2125 ... (3)
subtracting eq(2) and (3), we get 47x = 1275
x = 27.13 substitute in eq(1), we get
y = 57.87
Misty needs 27.13 ounces of 72% acid and 57.87% of 25% acid solution.
The sum of the interior and exterior angle need to equal 180 degrees.
Let the exterior angle = X
You are told the interior angle = 38x +24
Now you have x + 38x +24 = 180
Combine like terms:
39x +24 = 180
Subtract 24 from each side:
39x = 156
Divide both sides by 39:
x = 156 / 39
x = 4
The number of sides is found by dividing 360 by the exterior angle:
360 / 4 = 90
There are 90 sides.
Answer:
x ≥ 2 or x ≤ -2
Step-by-step explanation:
|2x+1|≥5
There is a positive and negative solution. When we take the negative solution we flip the inequality.
2x+1 ≥5 or 2x+1 ≤-5
Subtract 1 from each side
2x+1-1 ≥5-1 2x+1-1 ≤-5-1
2x ≥ 4 2x ≤- 4
Divide by 2
2x/2 ≥ 4/2 2x/2 ≤- 4/2
x ≥ 2 or x ≤ -2
Answer:
r= - 5/7
Step-by-step explanation:
Calculate the difference
-7 r = 5
Divide both sides of the equation by -7
r= -5/7
Therefore the solution is r= - 5/7
Specify question
Please specify the question it depends on how much gallons they were adding per hour