How many solutions does the system have?

Infinitely many solutions.

You basically have just one equation.

The top equation is the bottom equation times 5.

Step-by-step explanation:

C. Infinite many solution

Step-by-step explanation:

#1 simplify the first equation: 20x-5y=5

since the GCF in it is 5, we factor out 5

                   4x-y=1

#2 compare the first and the second equation

we can see that both equation are same, which means they present the same line.

Thus, they overlap and they have infinite many solution

Perimeter = 12.0 m

Step-by-step explanation:

Perimeter = AB + AC + BC

AB = 5 m

B = 53°

Use trigonometric functions to find AC and BC respectively.

✔️Find AC:

Reference angle = 53°

Opposite side length = AC

Hypotenuse = 5 m

Apply SOH, which is:

Sin 53 = Opp/Hyp

Sin 53 = AC/5

5*Sin 53 = AC

AC = 3.99317755 ≈ 4 m

✔️Find BC:

Reference Angle = 53

Hypotenuse = 5 m

Adjacent = BC

Apply CAH, which is:

Cos 53 = Adj/Hyp

Cos 53 = BC/5

5*Cos 53 = BC

BC = 3.00907512 ≈ 3.0 m

✔️Perimeter = 5 + 4 + 3 = 12.0 m