14. Reasoning Can you tell that there is no solution for a system by just looking at the equations? Explain and give an example.
15. If the difference in the side lengths of two squares is 10, and the sum of the
side lengths is 18, what are the side lengths?
16. A shopper purchased 8 T-Shirts and 5 pairs pants for $220. The next day, he
purchased 5 T-shirts and 1 pair of pants for $112. How much does each T-shirt
and each pair of pants cost?​

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

What happens when the temperature of a solution increases?

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.