Which statements correctly describe the fraction bar diagram shown at left? Check all that apply. The unshaded portion of the fraction bar represents a unit fraction.

Each part of the whole fraction bar is equal to one-seventh.

The shaded portion of the fraction bar represents a unit fraction.

The shaded portion of the fraction bar represents 7/1 .

Each part represents a unit fraction.

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

What are the coordinates of the image of p for a dilation with center (0, 0) and scale factor 2

Amanufacturing firm has been averaging 16.8 orders per week for several years. however, during a recession, orders appeared to slow. suppose the firm’s production manager randomly samples 31 weeks and finds an average of 15.6 orders with a standard deviation of 2.3 orders. using a 0.025 significance level, test whether the mean number of orders has decreased. type the full 5 step procedure into the answer box, then for multiple choice practice, answer the following: 1. what is the name and symbol of the parameter that you are testing? 2. what is the symbol and value of the point estimate of that parameter? 3. what distribution are you using to test this parameter? 4. what is the critical value? 5. what is the test statistic value? 6. what is the p-value?