What is wrong with this question if K =4 then 3k+5=39
2 answers:
3k+5=-39
3(4)+5=-39
12+5=-39
17=-39
well 17 doesnt equal -39. the variable provided is wrong!
3k+5=-39
3k = -44
k = -14.66666667
so .... k should have been solved for instead of just plugging in a number!
You can tell it's wrong by plugging in 4 for K like so:
3(4) + 5 = 39
12 + 5 = 39
17 = 39
By looking at this you can tell it's false because 17 is not equal to 39.
I hope this helps! Feel free to let me know if you have any questions!
- mathwizzard3
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1 is 12/-30
not yet simplified
2 is A
Answer:
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The measure of arc AB is 100°.
12a)
5x + 45 + 3x - 25 = 180
8x + 20 = 180
8x = 160
x = 20
12b)
2x - 5 = 2(20) - 5 = 40 - 5 = 35
3x - 25 = 3(20) - 25 = 60 - 25 = 35
y = 180 - (35+35)
y = 180 - 70
y = 110
1/4/3 = 1/12
hope you understand