Answer:
BD would be 17 , hope this helps !!
Answer:
B, 9
Step-by-step explanation:
Let g represent the number of glass items. Then the number of plastic items is (9g -30). If 85% of items are plastic, then 100%-85% = 15% of items are glass. The ratio of plastic to glass is ...
85%/15% = (9g -30)/g
17/3 = 9 -30/g . . . . simplify
30/g = 9 -17/3 = 10/3 . . . . . . add 30/g -17/3
g = 30(3/10) = 9 . . . . . . . . . . multiply by 3g/10
There are 9 glass items.
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<em>Additional comment</em>
The number of plastic items is 9(9) -30 = 51, and the total number of items is 51+9 = 60. The percentage of plastic items is 51/60 = 85%.
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There are many other ways the equation(s) could be written, including using a system of two equations. For example ...
- p = 9g -30
- p/(p+g) = 0.85 . . . . . plastic is 85% of the total
Answer:
∠ EAC = 50°
Step-by-step explanation:
Since AE is an angle bisector of ∠ BAC , then
∠ EAC = ∠ BAE , that is
3x - 10 = x + 30 ( subtract x from both sides )
2x - 10 = 30 ( add 10 to both sides )
2x = 40 ( divide both sides by 2 )
x = 20
Then
∠ EAC = 3x - 10 = 3(20) - 10 = 60 - 10 = 50°
Answer:
what?
Step-by-step explanation:
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