Answer:
D
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 + y² = z² , substitute values
4² + y² = ( )², that is
16 + y² = 137 ( subtract 16 from both sides )
y² = 121 ( take the square root of both sides )
y = = 11 → D
Answer: 16 hours
Step-by-step explanation:
Given
Carla earns for each hour she works
Last week she earned $148 total including tip
So, the sum of hourly income and must be equal to the total money earned
Suppose she works for hours
Thus, she works 16 hours last week