7. Which of the answer choices has matrix multiplication defined? А
B
с
D
2 3
6 77
8 9
8
-4 0
[5 9 7]
6
7
1
O
BA
o
CB
DC

i’m here for points.

i those same problems in math and dont know how to do them

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be