Answer:
10 13/16
Step-by-step explanation:
For 3. the triangle with 4,4,5 is similar to the one with 8,10 because you can scale it down by 2 or because it is similar in shape
4. X=-3
Answer:
40
Step-by-step explanation:
8 = x/5
x = 8*5
x = 40
Answer:
Yes
Step-by-step explanation:
The smaller two sides have to be greater than the biggest side.
2+8>9, so it can make a triangle.
We have that
2sin²<span>x - sinx - 3 = 0
</span>
Let
A------> sin x
so
2A²-A-3=0
using a graph tool-----> to resolve the second order equation
see the attached figure
the solutions are
A=-1
A=1.5------> is not solution because sin x <span>can not be 1.5
the solution is
A=-1
therefore
sin x=-1
x=arc sin(-1)=-90</span>°
the answer is
sin x=-1x=-90° or 270°