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2x + y = 8. x + y = 4. The lines whose equations are given intersect at.

A) (4, 0)   B) (0, 4)   C) all points on the line

How do I write a series in sigma notation?

Consider the sum: (5)2 + (11)2 + (17)2 + ... + (18n - 1)2   How do I write this in sigma notation? The final term is really confusing me.

How many of each kind of ticket were sold?

There were 305 tickets sold for a basketball game. The activity cardholders' tickets cost \$1.25 and the non-cardholders' tickets cost \$2.50. The total amount of money collected was \$578.75. How many...

cannot understand how to connect g(x) = (x-2)^2 to the correct graph

I'm trying to understand matching functions to their graphs.  I've been given pictures of graphs and four functions.  I am suppose to match each function to the correct graph.

Show that the set V of all 2x2 upper triangular matrices is asubspace of M22 I need to turn this in tonight by 12 pm. Please, help!

Find the domain and codomain and determine whether T is linear

w1=5x1-x2+x3 w2= -x1+x2+7x3 w3= 2x1-4x2-x3 My solution so far: From the system I can tell that it is R3, so domain is R3, since there w1, w2, w3 I can tell that codomain is...

Determine whether w is in the range of the linear operator T

T:R3 - R3: T (x,y,z) = (2x-y, x+z, y-z); w= (3,3,0) Here is my solution: T (3,3,0) = (2x3-3, 3+0, 3-0) T (3,3,0) = (3, 3, 3)  What I am doing wrong? And how to explain...

Why must the determinant of a matrix with integer entries be an integer?

My answer would be because it involves only addition, subtractions and multiplications, no divisions. But I am not 100%sure.

what is a straight edge

a sraight line is a line that has a one end point and a arrow that keeps going the other direction

Linear Algebra

. Indicate whether the statement is true or false. Justify your answer. (a) If Ax=b has infinitely many solutions, then so does Ax=0 (b) If Ax=b is inconsistent, then Ax=0 has only the trivial...