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?​

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

sup bro, im dumb, but this is what i found xd

"the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface"