Find the values of x and y in the following matrix addition.
x = _______
y = _______
1 point
1
Question 3
3.
Find the sum to solve for a, b, c and d.
a = _______
b = _______
c = _______
d = _______
1 point
1
Question 4
4.
Learning Matrix Multiplication with Football Scores
In 1966, Washington and New York played the highest scoring game in NFL history. The table summarizes the scoring. A touchdown (TD) is worth 6 points, a field goal (FG) is worth 3 points, a safety (S) is worth 2 points and an extra point (EP) is worth 1 point. Using matrix multiplication, what was the final score?
Washington's Final Score = _______
New York's Final Score = _______
We're going to use the "Football Scores" problem to demonstrate how to set this up on Desmos.
1st - You can only multiply two matrices if...
2nd - Open desmos.com and go to the Matrix Calculator.
3rd - Set up matrices.
Notice, it can not do BA =
This is because we con not multiply a 4x1 with a 2x4. Inside numbers must be the same to multiply.
1 point
1
Question 5
5.
1st, create matrix A as a 1x3 matrix for the cost of each type of taco.
Next, create matrix B as a 3x5 matrix for each day's data.
Multiply A*B.
How much were total sales on each day of the week?
Monday's = _______
Tuesday's Sales = _______
Wednesday's Sales = _______
Thursday's Sales = _______
Friday's Sales = _______
1 point
1
Question 6
6.
Create and label the following matrices:
1 point
1
Question 7
7.
Calculate VC and label the resulting matrix.
a = _______
b = _______
c = _______
What do the values represent?
1 point
1
Question 8
8.
Calculate VR and label the resulting matrix.
a = _______
b = _______
c = _______
What do the values represent?
1 point
1
Question 9
9.
What do the values represent from #8?
1 point
1
Question 10
10.
What matrix calculation would you perform to determine Amani’s profit for each of his customers?
(there is a hint.)
a = _______
b = _______
c = _______
1 point
1
Question 11
11.
What information do we get if we convert C from a 3x1 matrix to a 1x3 matrix and then multiply CV?