What is the k value for the vertex of y = x^2 - 6x + 7?

I need help badly can yall help me out pl

Allie answered 72% of the questions on her math test correctly. if she answered 18 questions correctly, how many questions were on the test?

For how answer my question this will be the last question can you answer in math subject

Aplot of land has been surveyed for a new housing development with borders ab, bc, dc, and da. the plot of land is a right trapezoid with a height of 60 feet and an opposite leg length of 65 feet