One of your friends lives 225 km away. It took him 2.5 hours to travel to the cottage. At what speed did he travel?
1 answer:
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Answer:
Step-by-step explanation:
If you have a square of side , its diagonal would be
, and its area
If the big square has a area of 900, this implies that its side is , so the two diagonal of squares 2 and 4 added together would be
, therefore one diagonal wold be
. and its side
. The area (of one square) is
finally the two areas combined (squares 2 and 4) would be 225
9514 1404 393
Answer:
y = (5/27)(x -7)^2 -5/3
Step-by-step explanation:
Use the given points to find the unknowns in the equation.
If the axis of symmetry is x=7, then the equation can be written in the form ...
y = a(x -7)^2 +b
Filling in the two point values, we have two equations:
0 = a(4 -7)^2 +b ⇒ 9a +b = 0
5 = a(1 -7)^2 +b ⇒ 36a +b = 5
__
Subtracting the first equation from the second, we have ...
(36a +b) -(9a +b) = (5) -(0)
27a = 5
a = 5/27
Substituting that value into the first equation gives ...
9(5/27) +b = 0
5/3 +b = 0
b = -5/3
So, the quadratic can be written in vertex form as ...
y = (5/27)(x -7)^2 -5/3
