which expression represents the phrase "three times the sum of a number and 4"?

Let ANY VARIABLE = a number

You did not provide a list of expressions.

Let n = a number

The sum of a number and 4 = n + 4.

We now multiply 3 times n + 4.

3(n + 4)

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