<em>CA </em>⁻¹ is undefined because there are more columns in <em>A </em>⁻¹ than there are rows in <em>C</em>.
Answer:
1. 75 minutes
2. 5:50
Step-by-step explanation:
you have to add and subtract
Answer:
Step-by-step explanation:
Using point-slope form,
Answer:
3 cups
Step-by-step explanation:
the original recipe calls for 6 cups of flour (3 times as much as sugar. sugar is 2 cups, times 3 is 6)
half it: 6/2 = 3
1. Observe the problem
2. Make a system of linear equations
x is pens
y is pencil
As stated in the text, x=2y
x=2y
7x+12y=6.50
Using substitution,
7(2y)+12y=6.50
14y+12y=6.50
26y=6.50
y=0.25
Substituting it back into the first equation:
x=2(0.25)
<h2><u><em>
x=0.5</em></u></h2><h2><u><em>
y=0.25</em></u></h2>
