All real numbers. in interval notation, that's (<span><span>−∞</span>, ∞</span><span>). there isn't a value you could insert for "x" that would give you an error.</span>

From Left side:


NOTE: sin²θ + cos²θ = 1






Left side = Right side <em>so proof is complete</em>
Center: 0,0
vertex: 5,0
vertex2 (-5,0)
Austin should pay $75 the first month, and 37.50 for the remaining of the 2 months
Yes, you can add a negative and a positive when doing like terms.