Well the formula is : b1+b2/2 (h)
so the height would be solved as :
13.5 = 3+6/2 (h)
13.5 = 9/2 (h)
h = (13.5)/(9/2)
h = (13.5) x (2/9) *reciprocal*
h = (27) / (9)
h = 3
Answer:

Step-by-step explanation:-
To find the midpoint, the equation we use is:-

x1 = 10
x2 = 5
y1 = 7
y2 = 4
Substituting the values in the equation, we get:-

Coordinates of the midpoint---> 
If you want an answer greater that 7, your fraction needs to be greater than 1.
n can be any number greater than 4

Answer:
an infinite number
Step-by-step explanation:
The equation simplifies to ...
12x -7 = 6x +10 +6x -17 . . . eliminate parentheses
12x -7 = 12x -7 . . . . . . . . collect terms
0 = 0 . . . . subtract (12x-7) from both sides
This is true for all values of x. There are an infinite number of solutions.
When solved
(x + 1 < 4) ∩ (x - 8 > -7)
becomes:
(x+1-1 < 4-1) ∩ (x - 8 +8 > -7+8 )
(x < 3) ∩ (x > 1).
and if you change places it will become even more obvious:
( 1<x ) ∩ ( x < 3 )
meaning: x is set of all numbers greater than 1 and less than 3 or otherwise:
{x | 1 < x < 3}