2 9/10 in decimal form would be,

if you have any other questions like this,
let me know ill help you!!
Answer:
10
Step-by-step explanation:
the absolute value of a number is the distance from 0
the answer will ALWAYS be positive ;)
Answer:
130
All of the angles on a triangle add up to 180 degrees.
Answer:
please I can't see any question
but the equation of a line is
y- y1 =m(x-x1)
where m is the the gradient of the line
Answer:
See explanation
Step-by-step explanation:
Consider the first triangle:
1. From the right triangle with acute angle 

2. From the right triangle with acute angle 

Thus,

Consider the second triangle:
1. From the right triangle with acute angle 

2. From the right triangle with acute angle 

Thus,

Now, since
we have
and
If
and
then
This means
and
Hence,
Now,

and

so

Note that this solution is true only for acute angles 