Harold used a 3% iodine solution and a 20% iodine solution, Mathematics

Assignment Help:

Harold used a 3% iodine solution and a 20% iodine solution to make a 95- ounce solution in which was 19% iodine. How many ounces of the 3% iodine solution did he use?

Let x = the amount of 3% iodine solution. Let y = the amount of 20% iodine solution. Because the total amount of solution was 85 oz., then x + y = 85. The amount of each kind of solution added together and set equal to the amount of 19% solution could be expressed in the equation 0.03x + 0.20y = 0.19(85); Use both equations to solve for x. Multiply the second equation by 100 to remove the decimal point: 3x + 20y = 19(85). Simplify that equation: 3x + 20y = 1805. Multiply the ?rst equation by -20: -20x + -20y = -1700. Add the two equations to eliminate y: -17x + 0y = -85. Divide both sides of the equation by -17: -17x/-17 -85/-17 = x = 5. The amount of 3% iodine solution is 5 ounces.


Related Discussions:- Harold used a 3% iodine solution and a 20% iodine solution

How much does every person required to pay rob, Rob purchased picnic food f...

Rob purchased picnic food for $33.20 to share along with three of his friends. They plan to split the cost evenly among the four friends. How much does every person required to pay

Correlation coefficient, Correlation coefficient - These are numerical...

Correlation coefficient - These are numerical measures of the correlations existing between the independent and the dependent variables - These are better measures of corre

What is the area of the court in square feet, A racquetball court is 40 ft ...

A racquetball court is 40 ft through 20 ft. What is the area of the court in square feet? The area of a rectangle is length times width. Thus, the area of the racquetball court

Correlation and regression, Correlation and Regression Correlation ...

Correlation and Regression Correlation CORRELATION is an important statistical concept which refers to association or interrelationship among variables. The reasons of

Surface area, Find the amount of sheet metal need to form a conical funnel ...

Find the amount of sheet metal need to form a conical funnel of base radius 30cm with a vertical height of 50cm, allowing for 0.5cm overlap. Find the total surface area?

Find k to three decimal places, The population of a city is observed as gro...

The population of a city is observed as growing exponentially according to the function P(t) = P0 e kt , where the population doubled in the first 50 years. (a) Find k to three

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd