"roger would like to know the average of his test scores. write an equation that would calculate the average given five test scores. write the equation with and without using a function. sprankle, maureen; hubbard, jim. problem solving and programming concepts (page 38). pearson education. kindle edition."

Let the 5 test scores be a, b, c, d, and e. Let m be the average. To find the average of the 5 scores, add them, and divide the sum by 5.

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