andrew2217

27.05.2021 • 

Mathematics

The box plot below.represents the number of absences, per student, over a semester by a group of seniors at Green Hill High School.
+
Number Absences over a Semester per Student

(SEE PICTURE)

Using the box plot above,
which of the following are true regarding the data set?

I. The interquartile range is 10 days.

II. The median is 2 days.

III. About 50 percent of the seniors missed from 1 day to 5 days over the given semester.

IV. About 50 percent of the seniors missed from 5 days to 10 days

A. I & II
B. I & III
C. I & III
D. II & IV

Ответ:

S145571

24.05.2020

Mathematics

---

The function is  1/4x^2  + x - 8

Step-by-step explanation:

In Factor form the function  is

a(x + 8)(x - 4)    where a is a constant to be found.

= a( x^2 + 4x - 32)  Note the coefficient of x is positive because the function has a minimum value.

The line of symmetry is x = (-8+4)/2 = -2.

So the minimum value  will be the  value of f(x) when x = -2, so we have the equation

a(-2+8)(-2-4) = -9

-36a = -9

a = 1/4.

---

0,0(0 оценок)