10

solve the given linear-quadratic system graphically. how many points of intersection are on the graph? show all work.

y = x^2 – 5x – 4
y = –2x

Describe in detail how you would construct a 95% confidence interval for a set of 30 data points whose mean is 20 and population standard deviation is 3. be sure to show that you know the formula and how to plug into it. also, clearly state the margin of error.

Brent wants to know what is 5 x 1/2

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?