Determine the critical values for these tests of a population standard deviation. (a) a right-tailed test with 18 degrees of freedom at the alphaequals0.1 level of significance (b) a left-tailed test for a sample of size nequals22 at the alphaequals0.01 level of significance (c) a two-tailed test for a sample of size nequals30 at the alphaequals0.1 level of significance

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

the correct answer is 5 6 and 7

deez nu tz

step-by-step explanation: