The answer is in the thousands group. Its the way they word the problem that complicates it. 913,256 256 being the ones group 913 being the thousands group. So the name of the period with 913, is the thousands group
Answer:
The answer is B
Step-by-step explanation:
Answer:
Part A) The system of equations is equal to


Part B)
The length is 
The width is 
Step-by-step explanation:
Part A)
we know that
The perimeter of the triangle is equal to the sum of the length of its three sides
In this problem

-----> equation A
The perimeter of rectangle is equal to

In this problem

------> equation B
Part B)
Using a graphing tool
Solve the system of equations
We know that
The intersection point both graphs is the solution of the system of equations


The intersection point is 
see the attached figure


step 3
Find the length and width of the rectangle
The length is 3x

The width is 7y

There are 4 variables in the expression. The variables are: a,b,c and d.
8d^2 = variable d
2bc = variables b and c
10ab = variables a and b