Find the 15th term of the geometric sequence 1, -4, 16, ...
1 answer:
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Answer:
122.5
Step-by-step explanation:
Use the area formula for a trapezoid (attached below as an image):
A = area in sq cm
a = top base
b = bottom base
h = height
Correspond the correct values with the variables:
a = 14
b = 21
h = 7
A = 1/2 * (14 + 21) * 7
A = 1/2*(35)*7
A = 17.5 * 7
A = 122.5 sq cm
Hope this helps (●'◡'●)
<h2>Answer:36 
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Step-by-step explanation:
Given that is isosceles triangle.
A isosceles has two sides equal an the third side is the base.
So, ...(i)
Given that length of the base
Given that the perimeter of the triangle is
So, ...(ii)
Using (i) and (ii),