Evaluate 2a - (-4b)
if a = 10 and b = 6

44.

Step-by-step explanation:

First step is to plug in the values.  We know that

2a - (-4b)

a= 10 and b =6

2(10)-(-4)(6)

20-(-24) = 44 *Negative times a negative equals a positive

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

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step-by-step explanation: