7/10 minus 3/5 does it equal to 1/10

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Lucy and donavan measured the length of the school garden. lucys measurement is 11.3m and donavans measurement is 113 cm. could both be correct? explain

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?