Reagan's Number Puzzle

123456789
Across
  1. 1. the equation to find the vertex of a parabola
  2. 4. a slope perpendicular to a slope of 1/8
  3. 5. linear equation that represents a slope of 213 and a y intercept of 74
  4. 6. pi rounded to the nearest hundredth
  5. 7. solve for a, -8a-3=4a+21
  6. 8. the 5th perfect square
  7. 9. the y intercept of the line y=x+359
Down
  1. 2. factor 4x^2+6x
  2. 3. solve for k, 792+(5^2)k=824-5k
  3. 4. the slope of the line y=-43x+9
  4. 5. linear equation in which the slope is 7 and the y intercept is 63
  5. 7. slope perpendicular to a slope of 92