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Yolande952 Yolande952
  • 11-06-2014
  • Mathematics
Answered

The graph of y = −5x^2 + 9 passes through (1,2a) in the

standard (x,y) coordinate plane. What is the value of a ?

F. 2

G. 4

H. 7

J. −1

K. −8

Verified Answer :

Anonymous Anonymous
  • 05-07-2014

\(y=-5x^2+9\\\\(1;\ 2a)\to\ for\ x=1;\ y=2a\\\\for\ x=1\\\\y=-5\cdot1^2+9=-5+9=4\\\\2a=4\ \ \ \ /:2\\\\a=2\\\\Answer:F.\)

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