faith is 16 years older than precoius in 10 years time. faith will be double Precious age. How old is precious?​

6 years old

Step-by-step explanation:

Let represent Faith's current age and let represent Precious's current age.

Faith is 16 years older than Precious:

In 10 years' time, Faith will be double Precious's age:

We can substitute the top equation into the bottom equation:

We can combine like terms on the left side and expand out the right side:

We can subtract p from both sides, and then subtract 20 from both sides to get:

This means Precious is 6 years old.

An obtuse triangle.

Step-by-step explanation:

We have given the different sides of a triangle that is Side A = 2, Side B = 8 and Side C = 7.

According to the question, we can tell the triangle is acute, obtuse or a right triangle.

We know that,    

For given sides x,y,z of a triangle,

If = , then its a right triangle.

If < , then its an acute triangle.

If > , then its an obtuse triangle.

We have a = x = 2, b = z = 8 and c = y = 7.

Note: We always take z as the greatest side length.

Now,

We can see that, 4 + 49 < 64.

So, we can apply rule

if > , then its an obtuse triangle.

Therefore,

Given sides are of an obtuse triangle.