Answer:
18 inches
Step-by-step explanation:
volume = lenght * width * depth
let the depth be x
32400=60*30*x
x=32400/(60*30)
x=32400/1800
x=18
It would take 93.33 hours to use 14 kilowatt hours of electricity.
Step-by-step explanation:
Given,
Electricity used in one hour = 3/20 kilowatt hours
Ratio of time to electricity = 1 : 3/20
Let,
x be the number of hours to use 14 kilowatt hours electricity.
Ratio of time to electricity = x : 14
Using proportion;
Ratio of time to electricity :: Ratio of time to electricity
Product of mean = Product of extreme
Multiplying both sides by 20/3
It would take 93.33 hours to use 14 kilowatt hours of electricity.
Keywords: ratio, proportion
Learn more about ratios at:
#LearnwithBrainly
2x + 5y = 3
-x + 3y = -7
multiply the second equation by 2
-2x + 6y = -14
2x + 5y = 3
-2x + 6y = -14
add two equations
2x + 5y = 3
+ -2x + 6y = -14
------------------------------
11y = -11
y= -1
substitute -1 to any of the equations
2x + 5(-1) = 3
2x - 5 = 3
2x = 8
x = 4
so the final answers are..
x = 4 , y = -1
<h3>
Answer: 20</h3>
Explanation:
For any rectangle, the diagonals are the same length.
AC = BD
7x-35 = 3x+45
7x-3x = 45+35
4x = 80
x = 80/4
x = 20