The circle is tangent to x axis - it means that it is touching the x axis. If it is tangent to the x axis, then the radius r is equal to 4
(x - h)² + (y - k)² = r²
(x + 7)² + (y - 4)² = 4²
(x + 7)² + (y - 4)² = 16
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Problem:
The circle is tangent to the x-axis and the center is at (-7,4).
Solution:
The circle is tangent to x axis - it means that it is touching the x axis. If it is tangent to the x axis, then the radius r is equal to 4
(x - h)² + (y - k)² = r²
(x + 7)² + (y - 4)² = 4²
(x + 7)² + (y - 4)² = 16
Answer:
(x + 7)² + (y - 4)² = 16
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