Answer:
β = 140 - α
we know that the "missing" angle is 40° since 40 + 140 = 180
we also know that the total sum of angles in a triangle is 180
so β = 180 - 40 - α
or β = 140 - α
Step-by-step explanation:
The statements that are true are A, B, and D
Answer:
It would be D because X^2 is different from 3x you would just multiply X^2 by 1 and 3x by 1 to get x^2+3x
Answer:

8,3*0,25=2,10%(2d.p)
Step-by-step explanation:
Answer:
14+5 = 19
19 + 15/2
15/2 = 7.5
19+7.5 = 26.5
Just remember PEMDAS!
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Step-by-step explanation: