6 (1), (2), (3), (1,2), (1,3), and (2,3)
She has 8 dimes, 11 quarters, and 22 nickels
Answer:
5.667
Step-by-step explanation:
Part a) Find the expression that gives the perimeter of ∆XYZ
we know that
Perimeter of triangle ABC is equal to

In this problem ∆ABC and ∆XYZ are similar triangles
the scale factor is equal to r
so

therefore
the answer Part a) is
The expression that gives the perimeter of ∆XYZ is 
Part b) Find the expression that gives the area of ∆XYZ
we know that


therefore
the answer Part b) is
The expression that gives the Area of ∆XYZ is 
10x - 4 = 2x
8x = 4
x = 1/2
answer is D. one real solution x = 1/2