Sarah has 18 postcards in her postcard collection. she decides that from now on, every time she goes on vacation she will buy 5 postcards to add to her collection. write an equation to represent the number of postcards, y , she will have after a certain number of vacations, x .

20 points + brainliest answer + my mom’s chocolate chip cookie ! subtract.

Awavelength of 610 nm was found to be the most intense wavelength emitted by copper. answer the following questions about this wavelength of light. a) what is this wavelength in cm? b) what is the frequency that corresponds to this wavelength? c) what is the energy of light of this wavelength? d) what is the wavenumber corresponding to this wavelength?

Which law states that if a conditional is true and its hypothesis is true, then the conclusion is true? a. the law of syllogism c. the law of detachment b. the law of conditional d. the law of deductive reasoning