450 * 0.3 = 135 = money taken off the original price
Sale price = $315
Answer:
The answer is -a
Step-by-step explanation:
from equation,

∴
Therefore, -a is equal to b
hope you have understood this....
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Answer:
The angle of depression is equal to 
Step-by-step explanation:
Let
x------> the angle of depression
we know that

Answer:
YZ = 7 , MO = 8
Step-by-step explanation:
A segment joining the midpoints of 2 sides of a triangle is half the length of the third side.
(11)
YZ =
MN , that is
3x + 1 =
(10x - 6) = 5x - 3 ( subtract 5x from both sides )
- 2x + 1 = - 3 ( subtract 1 from both sides )
- 2x = - 4 ( divide both sides by - 2 )
x = 2
Then
YZ = 3x + 1 = 3(2) + 1 = 6 + 1 = 7
(12)
XY =
MO , that is
x - 1 =
(3x - 7) ← multiply through by 2 to clear the fraction
2x - 2 = 3x - 7 ( subtract 3x from both sides )
- x - 2 = - 7 ( add 2 to both sides )
- x = - 5 ( multiply both sides by - 1 )
x = 5
Then
MO = 3x - 7 = 3(5) - 7 = 15 - 7 = 8