Answer:
um this is a statement not a question. what exactly are ur trying to find? volume?
Step-by-step explanation:
It is a pentagon so the sum of the angles is 520, therefore:
75+140+2x+5x+3x+5=520
80+140+2x+5x+3x=520
220+2x+5x+3x=520
2x+5x+3x=300
10x=300
x=30
Hope this helps :)
Answer:
Step-by-step explanation:
The angle of incidence and reflection is 45°
The angle between them is 90°
they lie on the same plane, and angle of incidence = angle of reflection
the sum of all the angles is 180°
let angle of incidence and reflection be x
therefore,
90 + 2x = 180
x = 45°
3a+11=7a-13
move 7a to the other side
sign changes from +7a to -7a
3a-7a+11= 7a-7a-13( combine like terms)
3a-7a+11= -13
-4a+11= -13
move 11 to the other side
sign changes from +11 to -11
-4a+11-11= -13-11
-4a= -13-11
-4a= -24
divide both sides by -4 to get a by itself
-4a/-4= -24/-4
Answer: a= 6