First distribute the negative to the second equation which would give you:
25x^2 - 14xy + 4 -7x^2 + 9y + 2xy + 7
Since addition is commutative. you can now just add like terms.
18x^2 - 12xy + 9y + 11
Answer:
1. terms = 2, 3a, 9a ; like terms = 3a, 9a ; coefficients = 3, 9 ; constants = 2
2. terms = 7, -5x, 1 ; like terms = 7, 1 ; coefficients = -5 ; constants = 7, 1
Check the picture below.
notice chord QR is a diameter, thus the vertex at P has a right-angle by Thales theorem.
Answer:
and 
Step-by-step explanation:
The ratios of sine and cos are defined as follows:
, and

The hypotenuse is always the side opposite of the 90 degree angle (for the given triangle, the hypotenuse is 85)
Since we are looking at the angle A, the opposite side with respect to A would be the side length of 84. That leaves the side 13 as the adjacent side.
Thus, we can now write:


The correct answer is the first answer choice.
Answer:
the correct answer is 50 really hope this helped :)
Step-by-step explanation: