Which best explains whether a triangle with side lengths 2 in., 5 in., and 4 in. is an acute triangle? the triangle is acute because 22 + 52 > 42. the triangle is acute because 2 + 4 > 5. the triangle is not acute because 22 + 42 < 52. the triangle is not acute because 22 < 42 + 52.

Let

we know that

If -----> is a right triangle

If -----> is an obtuse triangle

If -----> is an acute triangle

so

substitute the values

------> is an obtuse triangle

therefore

the answer is

The triangle is not acute because

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

it is x=-4

step-by-step explanation: