2a-8a=12-8a
now add 8a to both side and you get
2a= 12
divide both sides by 2 and you get
a=6
Answer:
360
Step-by-step explanation:
The formula is (n-2)180 -> 6(180) = 1080
1080/8=135
135 is the measure of one interior angle so the exterior has to equal 45 for one side.
45 x 8=360
The answer is 360
Answer: David conducted (an observational study) because (it studies human behavior) and (the sample is not manuipulated).
Step-by-step explanation:
hope this helps! (:
The answer is 6. Skshehnebehehdbd
Answer:
x = 3
Step-by-step explanation:
The smaller triangle and larger one are similar, so corresponding sides are proportional.
8/4 = (8 +(x -1))/5
10 = x +7 . . . . . . . . . multiply by 5 and simplify
3 = x . . . . . . . . . subtract 7
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<em>Alternate solution</em>
The short segments are also proportional:
(x -1)/(5 -4) = 8/4
x -1 = 2 . . . . simplify
x = 3 . . . . . . add 1