Answer:
a,d,e
Step-by-step explanation:
75+a1 = 180
so a1=105
a1=x-15
105=x-15
x=120
then using rules of parallel lines with commone intersecting line gives the others.
Answer:

Step-by-step explanation:
sqrt of 7-11=2i
simplify to 
then sqrt of 9=3
then we simplify again to 
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19 units
Use the absolute value to find the difference between the values. This ensures that no matter which way round the calculation is done the result is the same
| - 13 - 6 | = | - 19 | = 19
or
| 6 - (- 13) | = | 6 + 13 | = | 19 | = 19
In an acute triangle all angles must be acute ( or less than 90°)
Answer: C ) 50°, 55°, 75°
A) and D ) are an obtuse and B ) is a right triangle.
Answer: 50%
Step-by-step explanation:
130/260 = 0.5 = 50%