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AysviL [449]
3 years ago
6

Solve the system of equations 10×+7y=99andy-×=2?

Mathematics
1 answer:
djverab [1.8K]3 years ago
8 0
You can use substitution and solve y-x=2 for y which is y= x+ 2 and plug it into the y of the other equasion and you get x=5 y=7
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puteri [66]

Answer:

The salt concentration of the mixed solution = 10%

Step-by-step explanation:

First assuming that the concentration of salt given is on a vol% basis.

First solution has 0.7 gallon of 5% salt

Amount of salt in this solution = 5% × 0.7 = 0.035 gallon

Second solution has 0.3 gallon of 22% salt

Amount of salt in this solution = 22% × 0.3 = 0.066 gallon

Total amount of salt in the resulting solution = 0.035 + 0.066 = 0.101 gallon

Total volume of the resulting solution = 0.7 + 0.3 = 1.00 gallon

Concentration of the mixture of salt = (0.101/1) = 0.101 = 10.1% = 10% to the nearest percent

Hope this Helps!!!

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3 years ago
Am I right or wrong?? ​
Slav-nsk [51]

Answer:

i think thats correct

Step-by-step explanation:

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2 years ago
35 POINTS FOR ONE QUESTION!!!!
maks197457 [2]

Answer:

<u>5,400 yd²</u>

Step-by-step explanation:

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2 years ago
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Nesterboy [21]

Answer:

x^2 -2x = 4x+1

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Step-by-step explanation:

A quadratic equation has the highest power of x being squared

x^2 -2x = 4x+1

2x^2 +12x = 0

9x^2 +6x -3=0

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