Here you go hope this helps :)
Answer: see proof below
<u>Step-by-step explanation:</u>
Use the following Product to Sum Identities:
2 sin A · cos B = sin (A + B) + sin (A - B)
2 cos A · cos B = sin (A + B) + sin (A - B)
Given: cos A + cos B = 1/2 and sin A + sin B = 1/4
<u>Proof LHS → RHS</u>
LHS = RHS: 1/2 = 1/2
Answer:
B
Step-by-step explanation:
The equation of a line in standard form is
Ax + By = C ( A is a positive integer and B, C are integers )
Given
y + 2 = 2(x - 2) ← distribute right side
y + 2 = 2x - 4 ( subtract y from both sides )
2 = 2x - y - 4 ( add 4 to both sides )
6 = 2x - y, that is
2x - y = 6 → B
They are equivalent because 4:5 can both be multiplied by 2 making 8:10.
2x-3y=1
+2x+3y=2
4x=3 substitute 3/4 for x in the first equation..you get y=2/9.
x=3/4