80 + 60 + y = 180 and if y and x are vertical angles y = x
Answer:
see explanation
Step-by-step explanation:
The sum of the 3 angles in a triangle = 180°
Subtract the sum of the given angles from 180 for B
B = 180° - (90 + 47)° = 180° - 137° = 43°
-------------------------------------------------------------
tan47° = =
Multiply both sides by 14
14 × tan47° = a, thus
a ≈ 15.0 (to the nearest tenth )
---------------------------------------------------------------
cos47° = =
Multiply both sides by c
c × cos47° = 14 ( divide both sides by cos47° )
c = ≈ 20.5 ( to the nearest tenth )
X^3+4y^3-2x^3+2y^3
x^3-2x^3+4y^3+2y^3
-x^3+6y^3
Answer:
b. 67
Step-by-step explanation:
In order for the average to be 62, the total of differences from 62 must be zero. The two given numbers have differences of -4 and -1, for a total of -5. In order for the total of differences to be zero, the third number must have a difference from 62 of +5. It must be 62+5 = 67.
Jon's height at his third checkup was 67 inches.
Answer:
correct!
Step-by-step explanation: