9514 1404 393Answer: (a) F -40 = 1/4x (b) 220 chirps per minute (c) 78 °FStep-by-step explanation:(a) Translate the words to a math expression using the given variable definitions. F - 40 . . . . . Fahrenheit temperature decreased by 40 = . . . . . . . . .is equivalent to 1/4x . . . . . . 1/4 of the number of cricket chirpsThen the equation for the relationship is ... F - 40 = 1/4x__(b) Substitute F = 95 and solve for x: 95 -40 = 1/4x 55×4 = x = 220At 95 °F, about 220 chirps per minute should be recorded.__(c) Substitute x=152 and solve for F: F -40 = 1/4(152) F = 40 +38 = 78For 152 chirps per minute the formula predicts a temperature of 78 °F.