(f+g)(x)=x^2-36+x^3+2x^2-10
(f+g)(x)=x^3+3x^2-46
Answer:
B, C, E, & F
Step-by-step explanation:
Option A is incorrect because the equation Ax = b is referred to as a matrix equation, not a vector equation.
Option B is correct. If Ax = b has a solution, vector b will a linear combination of columns of matrix A.
Option C is correct. In a matrix equation, product Ax when defined, is a sum of products.
Option D is incorrect. If an augmented matrix [Ab] had a pivot position in every row, there could be a pivot in the last column which would make it inconsistent.
Option E is correct. If the columns of an m×n matrix A span
, then the equation Ax=b is consistent for each b in
Option F is correct. IfA is an m x n matrix whose columns do not span, then the equation Ax = b is inconsistent for some b in
Options B, C, E, and F are correct.
C is in Q1 bc Q1 is the one in the top right
Answer:

Step-by-step explanation:
c. never.
Answer:
Number = -1
Step-by-step explanation:
8 - x = 3(x + 4)
8 - x = 3x + 12 ( /+x / -12 on both sides)
8 - 12 - x + x = 3x + x + 12 - 12
-4 = 4x (/ divide by 4)
-4/4 = 4x/4
-1 = x