1. Write the algebraic expression for the messaging problems. 2. For 5x + 9x + x, combine like terms: $$5x + 9x + x = (5 + 9 + 1)x = 15x$$ 3. The product of 10 and y is written as: $$10y$$ 4. Three times t minus 2 is: $$3t - 2$$ 5. The inverse of y by 12 means dividing 12 by y: $$\frac{12}{y}$$ 6. Take away 2 from r is: $$r - 2$$ Final answers: 1. $$15x$$ 2. $$10y$$ 3. $$3t - 2$$ 4. $$\frac{12}{y}$$ 5. $$r - 2$$