Answer:
C) 21
Step-by-step explanation:
a² + 20² = 29² Use Pythagorean Theorem to solve for a
a² + 400 = 841 Solve for the exponents
- 400 - 400 Subtract 400 from both sides
a² = 441 Take the square root of both sides
a = 21
9r
Explanation:
4r + 9r = 13r
13r-11r = 2r
2r + 7r = 9r
Loss
gain means you’re getting more, which is positive
D shows equivalent expressions
