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Keith_Richards [23]
2 years ago
12

The water level in a well decreased by 6 inches every month due to evaporation. What is the change in the water level after a si

x month period of time? ​
Mathematics
1 answer:
sashaice [31]2 years ago
6 0

Step-by-step explanation:

we don't know what level it was originally at so well use a variable for the unknown number. If you take 6 inches and do that 6 times for each month you will have 36 inches lost so w= water i = inches

w-(6i x 6) = 36

This isn't the best explanation but I hope this helps you

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The product of 9 and sum of a number x and 12
mr_godi [17]

Answer:

9(x + 19)

Step-by-step explanation:

Product is a multiplication key word where you'll usually always put parenthesis when multiplying, and where the keyword sum comes you'd add x and 12 for your equation :)

5 0
3 years ago
Ana can finish a certain job in 10 hours. Together, Ana and Nina can finish the same job in 3 hours. How many hours can Nina fin
Over [174]

Answer:   4.5 hours

<u>Step-by-step explanation:</u>

Ana: \dfrac{1}{10}\ \text{job per hour}\\\\Nina: \dfrac{1}{x}\ \text{job per hour}\\\\Together: \dfrac{1}{3}\ \text{job per hour}\\\\\\Ana + Nina = Together\\\dfrac{1}{10}\quad +\dfrac{1}{x}\quad =\quad \dfrac{1}{3}\\\\\\\dfrac{1}{10}(30x)+\dfrac{1}{x}(30x) =\dfrac{1}{3}(30x)\\\\\\\rightarrow\quad 3x+30=10x\\\\.\quad 3x+30=10x\\\underline{-3x\qquad \quad -3x\quad}\\.\qquad \quad 30=7x\\\\.\qquad \quad \dfrac{30}{7}=\dfrac{7x}{7}\\\\\\.\qquad \quad \dfrac{30}{7}=x

.\qquad \quad 4.5=x

5 0
2 years ago
Angeline bought p yards of polyester fabric priced at $4.25. per yard, and c yards of cotton
satela [25.4K]

Answer:

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b. 28.83

Step-by-step explanation:

4.25 x 5 = 21.25

3.79 x 2 = 7.58

7 0
2 years ago
40.8 gallons of paint among 8 containers how much paint is in each container
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5.1 gallons of paint are in each container.


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