Answer:
Step-by-step explanation:
Write the system
Solve by Elimination.
multiply the second equation by -3.
Add the Equations.
Plug this back in one of the equations.
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1 answer:
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Answer:
x = ± i
Step-by-step explanation:
subtract 64 from both sides
9x² = - 64 ( divide both sides by 9 )
x² = - ( take the square root of both sides )
x = ± = ±
i
Answer:
3.
equation =
Using:
or
or
7^2 + 12^2 = c^2
49 + 144 = c^2
c^2 = 193
missing length = 13.9 inches
4. equation =
Using:
or
24^2 + 32^2 = c^2
reduce to:
8 multiplied by everything:
3^2 + 4^2 = c^2
Since we know 3,4,5 is a Pythagorean triple, we can use this to find c.
Since c must be 5, we multiply by 8 since we divided by 8 earlier to get the 3,4,5 and get 40.
missing length = 40 inches