Answer:
D
Step-by-step explanation:
Let's substitute a for x²:
x^4 - 3x² - 4
a² - 3a - 4
Now, this looks like something that is much more factorisable:
a² - 3a - 4 = (a - 4)(a + 1)
Plug x² back in for a:
(a - 4)(a + 1)
(x² - 4)(x² + 1)
The first one is a difference of squares, which can be factored into:
x² - 4 = (x + 2)(x - 2)
The second one can also be treated as a difference of squares:
x² + 1 = x² - (-1) = (x + √-1)(x - √-1) = (x + i)(x - i)
The answer is (x + 2)(x - 2)(x + i)(x - i), or D.
8 over 9
= 8/9
= 8:9
Final answer: 8:9~
4n/5-4/7=64/35
4n/5-20/35=64/35
4n/5=84/35
4n=12
n=3. Hope it help!
Answer:
b!
Step-by-step explanation:
Answer:
Newspaper
Step-by-step explanation:
The level or degree of significance of independent variables used in a multiple regression analysis is usually measured by comparing the values of the slope Coefficient of each independent variable. From the result of the multiple regression analysis attached. The slope Coefficient of each independent variable is :
Television = 2.38 ; Newspaper = 1.45 and Mail = 1.82.
This slope values are the rate at which the dependent variable changes per unit increase in each of the independent variable.
Newapaper has the least slope Coefficient value of the 3 independent variables and hence will have the least significant effect on the value of revenue.
