If anyone knows plz help me

If x + 10 = 70, what is x? a. 40 b. 50 c. 60 d. 70 e. 80

Which table represents a linear function? i'll give brainliest to first answer ^'^

Aparticular telephone number is used to receive both voice calls and fax messages. suppose that 25% of the incoming calls involve fax messages, and consider a sample of 25 incoming calls. (a) what is the expected number of calls among the 25 that involve a fax message?