Amelia solves the following system of equations.

i’m on a time limit !

b, c, d

Step-by-step explanation:

b is because of the small square you see at the angle formed by a and b. This symbol indicates that the triangle is a right triangle.

c and d are due to the pythagorean theorem, which states that a^2+b^2=c^2.

You can check this with the squares that correspond with each side. Side a is 3 squares, b is 4, and c is 5

3^2+4^2=5^2

9+15=25

25=25

for d, a has 9 squares, b has 16, and c has 25.

9+16=25

25=25