Geometric mean of two numbers is squre root of thir product.
Given numbers are 12,20
Geometric mean = √(12*20)
= √240
= 15.49
= 15.5
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Outside
length is 7 inches
Outside Width
is 5 inches.
SOLUTION
Length of outside edge = 7 inches
Scale Factor: 1in = 2.5ft
New length of outside edge = (7 * 2.5)ft
New length = 17.5ft
Width of outside edge = 5 inches
Scale Factor: 1in = 2.5ft
New width of outside edge = (5 * 2.5)ft
New Width = 12.5ft
Therefore, the new dimension of the outside edges of the
frame is 17.5ft by 12.5ft
Isolate the X in the second equation
x=2y+14
Substitute that in for the x in the fist equation
7(2y+14) + 2y = 2
Distribute the 7
14y+14+2y=2
Combine like terms
16y+14=2
Isolate the 16y
16y=-12
Isolate y by dividing the whole equation by 16
y=-12/16
Simplify
y=-3/4
That is your y. To find x, plug y into one of the equations. I'm plugging it into the version of the second equation after we isolated x.
x=2(-3/4)+14
Distribute the 2
x=(-1.5)+14
Simplify
x=12.5
The answer would be
3x² + 6
