Answer:
y > -7
Step-by-step explanation:
Isolate the variable, y. Treat the > as a equal sign, what you do to one side, you do to the other. Subtract 7 from both sides:
y + 7 (-7) > 0 (-7)
y > 0 - 7
y > -7
y > -7 is your answer.
~
Answer: x=4
Step-by-step explanation:
Simplify the left side of 9x-3x-5=19 by combining like terms:
6x-5=19
Add 5 to both sides:
(6x-5)+5=19+5
Simplify:
6x=24
Divide both sides by 6:
(6x)/6=24/6
Simplify:
x=4
Answer:
k = 13
Step-by-step explanation:
Matrix is;
A =
[2 -5 9]
[-1 3 -5]
[ 7 1 k ]
Number of unknowns is less than the rank of 2. Thus, the determinant has to be zero for us to find k.
Thus, we have;
2((3 × k) - (-5 × 1)) -(-5)((-1 × k) - (-5 × 7)) + 9((-1 × 1) - (7 × 3)) = 0
Simplifying further gives;
2(3k +5) + 5(-k + 35) + 9(-22) = 0
6k + 10 - 5k + 175 - 198 = 0
k - 198 + 185 = 0
k - 13 = 0
k = 13
Model H shows equal expressions
