![katie18147](/avatars/19275.jpg)
katie18147
03.08.2019 •
Mathematics
How many gallons of a 50 antifreeze solution must be mixed with 90 gallons of 20% antifreeze to get a mixture that is 40% antifreeze
Solved
Show answers
More tips
- S Sport Running: How to Do It Right?...
- F Food and Cooking How to Cook Spaghetti Right – Secrets and Tips...
- P Philosophy Personal attitude towards Confession: how to prepare and undergo the procedure correctly?...
- H Health and Medicine Flu: How to Recognize It by the First Symptoms?...
- F Food and Cooking How to Sober Up Quickly? Important Facts and Tips...
- H Health and Medicine How to Properly Take a Blood Sugar Test?...
- H Health and Medicine Simple and Effective: How to Get Rid of Cracked Heels...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
Answers on questions: Mathematics
- M Mathematics 1. Does the point (2, 3) lie on the graph of y=3x-4 ? Explain. (2 points)...
- M Mathematics Explain how to determine the solutions to a quadratic equation, graphically....
- M Mathematics Which linear inequality is represented by the graph? Please help!...
- M Mathematics 1.)The angle θ lies in Quadrant IV. sinθ=−2/3 What is cosθ? a. −2/3b. 2/3c. −5/√3 d.5/√3 2.)The angle θ lies in Quadrant I. cosθ=3/5 What is tanθ? a.4/3 b.−4/5c. −4/3 d. 4/5 3.)Given...
- M Mathematics For a trapezoid, the midsegment is one-half of... a) the opposing leg b) the square of the largest leg c) the same as the smallest leg. d)the sum of the bases...
- M Mathematics If x ∥ y and y ∥ z, then...
- M Mathematics A circle with radius of 2 cm sits inside a 7cm x 11cm rectangle. what is the area of the shaded region?round your final answer to the nearest hundredth...
- M Mathematics What is a vertex . Please explain Thanks.....
- M Mathematics HELP ME PLS Which fraction has the lowest value? A number line going from negative 1 to positive 1 in increments of 1....
- M Mathematics What is the measure of XYZ?...
Ответ:
1) note that weight of pure antifreeze before mixing and after mixing is the same. So, if 'x' is weight of pure antifreeze in 50% solution, it is possible to make up equation before mixing: 0.5x+0.2*90.
2) there are 0.2*90=18 gal. of pure antifreeze in the 20% solution. If 'x' gal. is the weight of pure antifreeze in 50% sol. and 18 gal. is the weight of pure antifreeze in 20% sol., it is possible to make up an equation after mixing: 0.4(x+18).
3) using the both parts: 0.5x+0.2*90=0.4(x+18) ⇒ x=54 gal. of pure weight.
4) to find 50% solution of 54 gal. pure weight just 54:0.5=108 gal.
108 gal.
Ответ:
The correct answer is 260
Step-by-step explanation:
Also known as B