M = number
2m+25 is the correct expression
hope this helps
Answer:
If your calculator does not have a percent key and you want to add a percentage to a number multiply that number by 1 plus the percentage fraction. For example 25000+9% = 25000 x 1.09 = 27250. To subtract 9 percent multiply the number by 1 minus the percentage fraction. Example: 25000 - 9% = 25000 x 0.91 = 22750.
Step-by-step explanation:
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The answer is <span>A) 24.5 cubic inches of soda
</span>
Below is the solution:
V = pi * r^2 * h
<span>V = 3.14 * 1.25^2 * 5 </span>
<span>V = 24.5312 = 24.5 cubic inches </span>
The answer would be -7.
7 - (-4) - 18 (Simplify 3 * (-6) to -18)
7 + 4 - 18 ( Simplify brackets )
-7 (Simplify).
X: volume of the 20% sol'n to be used in the mixture
y: vol. of the 80% sol'n to be used in the mixture
Then x+y must equal 30 gallons.
.20x: amt. of pure fertizer in the 20% sol'n
.80x: amt of pure fert. in the 80% sol'n
.60(x+y) = amt of pure fert in the 60% sol'n
Then:
.20x + .80y = .60(x+y) = .60(30)
Since x+y must equal 30, y=30-x, and
.20(x) + .80(30-x) = 18
.20x + 24 - .80x = 18
6 = .60x
x = 10
Use 10 gallons of the 20% solution and 20 gallons of the 80% solution.
The result will be 30 gallons of a 60% solution.
