Rachel is planning to run an average of 6.4 miles over three consecutive days. On the first day, she ran 6.6 miles, and on the s
1 answer:
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Roots can be written as fraction exponents. An exponent of 1/2 means the square root.
Answer:
x = 4
Step-by-step explanation:
Using Pythagoras' identity in the right triangle.
The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is
x² + 1² = 9²
x² + 1 = 81 ( subtract 1 from both sides )
x² = 80 ( take square root of both sides )
x = =
=
×
= 4