Answer:
The area of rectangle is 
Step-by-step explanation:
we know that
The perimeter of a rectangle is equal to

we have

so

----> equation A
Remember that
The length of a rectangle is twice its width.
so
----> equation B
substitute equation B in equation A

solve for W

Find the value of L


<em>Find the area of rectangle</em>

substitute the values


Convert to mixed number

Answer:
Step-by-step explanation:
Answer:
52
Step-by-step explanation:
We can write this out as an equation. Let's say that the teacher's age is x. Triple the teachers age plus the students age is 163, which can be written out as:

We want to isolate the variable, so subtract 7 from both sides. This gives us:

Finally, we divide both sides by 3, giving:

So the teacher is 52 years old.
Hope this helps!
D: (-infinity, 0) U (0, infinity) because you cant have a zero in the bottom of the fraction