Compruebe: (1+tan60°)COS260°=1 y sec245°=1+tan245°

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

expression #3 is not equivalent. the others are.

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.

8

step-by-step explanation:

just put √(2) * √(32) into a calculator. that will make the answer be 8.