1.5 * 8/5 = 0.3*8 = 2.4
2.5 * 8/5 = 0.5*8 = 4.0
Answer:
y=
Step-by-step explanation:
Answer:
1.26 feets
Step-by-step explanation:
Given the following :
Vertex (0, 0)
Focus of reflector = 6 feets
Extension = 5.5 feets
Equation to obtain conic section of a parabola:
(x - h)² = 4p(y - k)
Vertex (0, 0)
h =0 ; k = 0, p = 6, x = 5.5
(5.5 - 0)² = 4*6(y - 0)
30.25 - 0 = 24(y - 0)
30.25 = 24y
y = 30.25 / 24
y = 1.26
Hence, depth of reflector = 1.26 feets
Ya sure.... What's your doubt?
Answer:
Diane sent 21messages
John sent 30 messages
Hans sent 84 messages
Step-by-step explanation:
Total messages =135
let messages sent by Diane =x
""". sent by John=x+9
sent by Hans=4x
Now the sum
x+x+9+4x=135
6x+9=135
6x=135-9
6x=126
x=126/6
x=21
Diane's message=x=21
John's message=x+9=21+9=30messages
Hans' messages=4×x=4×21=84