From the question, we know that:
a = 56
l = 8
w = n - 3
To find the number (n), we should find the width (w) first
General formula of rectangle area is
l × w = a
Input the number to the formula
l × w = a
8w = 56
w = 56/8
w = 7
After finding the width, we find n
w = n - 3
n - 3 = w
n - 3 = 7
n = 10
The number is 10
Answer:
120 seconds
Step-by-step explanation:
To solve this question you have to make equation of both gallon.
Gallon 1 have 130 gallons of water at the start and filled by 1/4 gallon each second. If x equal to the time in seconds, the equation of gallon 1 volume will be:
g1= 130+ 1/4x
Gallon 1 have 200 gallons of water at the start and drained by 1/ 3 gallon each second, the equation of gallon 2 volume :
g2= 200- 1/3x
When gallon 1 volume equal to gallon 2, it mean g1=g2
g1= g2
130+ 1/4x = 200- 1/3x
130- 200= -1/3x -1/4x
-70= - 4/12x - 3/12x
-7/12x= -70
7/12x= 70
x= 70*12/7
x= 120
think it may be 1100.736 because you would multiply the three numbers