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Law Incorporation [45]
3 years ago
10

Describe a real-world situation in which you would want to find the surface area of a prism

Mathematics
1 answer:
kondor19780726 [428]3 years ago
4 0
Companies that manufacture canned goods use surface area every day! Each can will need a wrapper to indicate what it is they're holding, and each wrapper just so happens to be the lateral area of a cylinder. Every winter, Christmas rolls around and it can seriously save paper and energy if you found the surface area of your gift prior to wrapping it. That way you can cut out the exact amount of paper without having uneven sides that will eventually need trimming, or sizes that don't fit. Hope this helps!
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A chemist has three different acid solutions. The first acid solution contains 25 % acid, the second contains 45 % and the third
liq [111]

Answer:

Wyzant

ALGEBRA WORD PROBLEM

Dorian S. asked • 06/28/17

THREE LINEAR EQUATIONS WITH THREE VARIABLES

A chemist has three different acid solutions. The first acid solution contains 15% acid, the second contains 25%,

and the third contains 70%. He wants to use all three solutions to obtain a mixture of 40 liters containing 45%

acid, using 2 times as much of the 70% solution as the 25% solution. How many liters of each solution should be used?

How to set up as three linear equations to find the answer?

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1 Expert Answer

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Best

Arthur D. answered • 06/28/17

TUTOR 4.9 (67)

Forty Year Educator: Classroom, Summer School, Substitute, Tutor

ABOUT THIS TUTOR ›

set up 2 equations

the first equation...

15%*x+25%*y+70%*2y=45%*40

0.15x+0.25y+1.4y=0.45*40

0.15x+1.65y=18

multiply all terms by 100

15x+165y=1800

divide all terms by 15

x+11y=120

the second equation...

x+y+2y=40

x+3y=40

x=40-3y

substitute into the first equation x+11y=120

40-3y+11y=120

40+8y=120

8y=120-40

8y=80

y=80/8

y=10 liters

x+3*10=40

x+30=40

x=40-30

x=10 liters

10 liters of 15%, 10 liters of 25%, and 20 liters of 70%

check:

10*15%=1.5

10*25%=2.5

20*70%=14

1.5+2.5+14=18

18/40=9/20=45/100=45%

45%*40=18

hope it helps

please mark brainliest

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Write an equation in slope-intercept form of the line that passes through the points (-6, -10) and (1,4).​
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Answer:

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Step-by-step explanation:

(x,y)

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- Count how many spaces are on the y-axis from -6 to 1 for numerator

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- Positive slope

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