Solve u² = 49, where u is a real number. Simplify your answer as much as possible.
1 answer:
Answer:
Step-by-step explanation:
To undo the square on the u, you have to take the square root of both sides:
The square root of u-squared is just u, so that's easy. When you take the square root of 49, however, you have to remember that what you get is both the positive and the negative of the square root of 49 which is 7. This is because 7 squared is 49 and so is (-7) squared. So the answer is
u = ±7
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Answer:
X=135 degrees
Step-by-step explanation:
the total interior angle of a triangle is 180.
To work this out you would first add the interior angles of B which is 69 and the interior angle of C which is 66, which gives you 135.
The next step is to minus 135 from 180, which gives you 45. This is because the total interior angle of a triangle is 180.
Then to work out the angle of x you would minus 45 from `180, which gives you 135. This is because the total angle in a straight line is 180 degrees.
1) Add the angles of 69 and 66.
2) Minus 135 from 180.
3) Minus 180 from 45.
Answer:
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