**Answer:**

D

**Step-by-step explanation:**

To obtain the product of f(x) and g(x)

= 3x(x² - 3x + 5) ← distribute by 3x

= 3x³ - 9x² + 15x → D

**Answer:**

161/40

**Step-by-step explanation:**

Slope = (-7-8)/(3+4) = -15/7

We cannot determine the y-intercept unless we know at least 2 points.

Pls thank me if i am right

I hope this helped:D

**Answer:**

(c) Multistage sampling

**Step-by-step explanation:**

Multistage sampling is a technique of sampling in which the population is divided in different stages or groups with the goal of reducing the sample size at each stage.

Here, multistage sampling is being used to obtain the sample of undergraduate students in the United States.

Hence, the correct option is **(c), Multistage sampling.**

**Answer:**

hi branliest me me bhi krunga