Consider the quadratic function

f (x) = x^2-8x-9

Vertex: (-b/2a, f (-b/2a))

What is the vertex of the function (__,__)

Sarah is saving to buy a new phone. She needs $150, and she has already saved $63. Write an equation to model this situation. Let x represent the amount of money Sarah needs.

PQ = (3 - 9) PR = (h - 6) Given that R lies on PQ. Find the value of h.

One-sixth of the fourth graders and one-third of the fifth graders miss school on Friday. The absentee sheet for Friday shows the names of 7 fourth graders and 14 fifth graders. How many fourth and fifth graders are enrolled in the school?

Two angles are complementary. one contains 30° more than the other. find both angles. the measures of the angles are degrees.

A puppy weighs 12 onces. what fraction part of a sound is this

What is 0.83000000001 a rational or a irrational?

Show that 1+kx is the local linearization of (1+x) ^k near x = 0

Write these decimal fractions in words 42/100

I'm stuck on this question: Find the 3 consecutive numbers whose sum is 438. Can someone take me through it?

Enter the first 8 terms of the sequence with f (1) = 42 and f (n) = f (n - 1) - 5 for each whole number greater than 1.