Answer:
Step 1 :
3
Simplify —
a
Equation at the end of step 1 :
3
((— • x) - 4) - 20 = 0
a
Step 2 :
Rewriting the whole as an Equivalent Fraction :
2.1 Subtracting a whole from a fraction
Rewrite the whole as a fraction using a as the denominator :
4 4 • a
4 = — = —————
1 a
Equivalent fraction : The fraction thus generated looks different but has the same value as the whole
Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator
Adding fractions that have a common denominator :
2.2 Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
3x - (4 • a) 3x - 4a
———————————— = ———————
a a
Equation at the end of step 2 :
(3x - 4a)
————————— - 20 = 0
a
Step 3 :
Rewriting the whole as an Equivalent Fraction :
3.1 Subtracting a whole from a fraction
Rewrite the whole as a fraction using a as the denominator :
20 20 • a
20 = —— = ——————
1 a
Adding fractions that have a common denominator :
3.2 Adding up the two equivalent fractions
(3x-4a) - (20 • a) 3x - 24a
—————————————————— = ————————
a a
Step 4 :
Pulling out like terms :
4.1 Pull out like factors :
3x - 24a = -3 • (8a - x)
Equation at the end of step 4 :
-3 • (8a - x)
————————————— = 0
a
Step 5 :
When a fraction equals zero :
5.1 When a fraction equals zero ...
Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.
Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.
Here's how:
-3•(8a-x)
————————— • a = 0 • a
a
Now, on the left hand side, the a cancels out the denominator, while, on the right hand side, zero times anything is still zero.
The equation now takes the shape :
-3 • (8a-x) = 0
Equations which are never true :
5.2 Solve : -3 = 0
This equation has no solution.
A a non-zero constant never equals zero.
Equation of a Straight Line
5.3 Solve 8a-x = 0 Tiger recognizes that we have here an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK). "y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.In this formula :y tells us how far up the line goesx tells us how far alongm is the Slope or Gradient i.e. how steep the line isb is the Y-intercept i.e. where the line crosses the Y axisThe X and Y intercepts and the Slope are called the line properties. We shall now graph the line 8a-x = 0 and calculate its properties
Graph of a Straight Line :
Calculate the Y-Intercept :
Notice that when x = 0 the value of a is 0/8 so this line "cuts" the a axis at a= 0.00000
a-intercept = 0/8 = 0.00000
Calculate the X-Intercept :
When a = 0 the value of x is 0/-1 Our line therefore "cuts" the x axis at x=-0.00000
x-intercept = 0/-1 = -0.00000
Calculate the Slope :
Slope is defined as the change in a divided by the change in x. We note that for x=0, the value of a is -0.000 and for x=2.000, the value of a is 0.250. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 0.250 - -0.000 = 0.250 in a. (The change in a is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)
Slope = 0.250/2.000 = 0.125
Geometric figure: Straight Line
Slope = 0.250/2.000 = 0.125
x-intercept = 0/-1 = -0.00000
a-intercept = 0/8 = 0.00000
Step-by-step explanation:
be the length of the rectangle and 
be the width. In the problem it is given that 
. It is also given that the area 
. Substituting in the length in terms of width, we have 
. Using the zero product property, 
. Solving these we get the width 
. However, it doesn't make sense for the width to be negative, so the width must be 
. From that we can tell the length 
.