Answer:
f(4) = -10
g(2) = 30
Step-by-step explanation:
Answer:
Therefore
and 
Step-by-step explanation:
Remember that if
= Identity Matrix
then 
.
Also remember that for any invertible matrix
Identity Matrix.
Therefore
Therefore
and
Answer:
112 people
Step-by-step explanation:
= 
write the proportion where x is the number of people with a missplaced time
50x = 5600 cross multipy
x = 112 divide both sides by 50
Just subisute values that will work
one easy way is to make one sides equal to only one of the placeholders, like y, and then lug in values in for x exg
x+2y=3
subtract x from both sides
2y=3-x
divideb bith sides by 2
y=-1/2x+3
subsitute valudes for x and get values for y
if x=2 then
y=-1/2(2)+3
y==-1+3
y=2
when x=2, y=2
when y=0 then y=3
(5, 3)
x y
Plug in:
x + y = 8
5 + 3 = 8
8 = 8
Plug in:
17(5) + 17(3) = 8
85 + 51 = 8
136 = 8
Answer - No, (5, 3) is not a solution to this system of equations.
