What is the GCF of M and M+1?

Step-by-step explanation:

Given that M is a positive integer, M + 1 is also a positive integer.

Since the difference between them is only 1, they cannot have a common factor above 1.

(For example if M is even, M + 1 must be odd and therefore they do not have a common factor 2 and so on)

Hence we conclude the GCF of M and M + 1 is 1.

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation: