Answer:
A
Step-by-step explanation:
The n th term formula for a geometric sequence is
= a![(r)^{n-1}](https://tex.z-dn.net/?f=%28r%29%5E%7Bn-1%7D)
where a is the first term and r the common ratio
here a = - 5 and r = - 10 ÷ - 5 = 2, thus
= - 5(
→ A
Answer:
Option D is correct
Step-by-step explanation:
-4(3x/2 - 1/2) = -15
<=>
-4*3x/2 + (-4)*(-1/2) = -15
<=>
-6x + 2 = -15
Square it -56 + 15k = k^2
re arrange get k^2 - 15k + 56 = 0
factor (k - 7)(k - 8) = 0
solve k - 7 = 0, k - 8 = 0
k = 7 or 8
You multily 9 by 5 since there is 5 wholes and those are divided into 9ths so 9by 5
Answer:
D. Obtuse Scalene
Step-by-step explanation:
One of the angles is over 90 degrees, which classifies the triangle as obtuse (right triangles are 90 degrees, and acute triangles are under 90 degrees). None of the side lengths are equivalent, so therefore the triangle is scalene (Isosceles triangles have two sides that are the same length). Hope this helps.