Prove 3 plus 4 root 5 is irrational?

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

Solve the triangle. a = 21°, c = 105°, c = 5

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.