In a batch of light bulbs, 30%are tinted, if 45 light bulbs are tinted, how many light bulbs are in the batch

What is the value of the digit 1 in the number 13?

The marriott family bought a new apartment three years ago for $65,000. the apartment is now worth $86,515. assuming a steady rate of growth, what was the yearly rate of appreciation? what is the percent of the yearly rate of appreciation?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2