Answer:
-4 1/4
Step-by-step explanation:
-7 3/4 + 3 1/2 = -4 1/4
15
We add the exponents so it is 10+5=15
1)x=2. 2)x=5/2
Steps in pic below
Pythagorean Theorem is for right triangles
right triangles have a 90 degree angle in them
D is a right triangle
