He owes 120 $ all you have to do is multiple 60 and 20 and you will get your answer hope I helped
(3 cos x-4 sin x)+(3sin x+4 cos x)=5
(3cos x+4cos x)+(-4sin x+3 sin x)=5
7 cos x-sin x=5
7cos x=5+sin x
(7 cos x)²=(5+sinx)²
49 cos²x=25+10 sinx+sin²x
49(1-sin²x)=25+10 sinx+sin²x
49-49sin²x=25+10sinx+sin²x
50 sin² x+10sinx-24=0
Sin x=[-10⁺₋√(100+4800)]/100=(-10⁺₋70)/100
We have two possible solutions:
sinx =(-10-70)/100=-0.8
x=sin⁻¹ (-0.8)=-53.13º (360º-53.13º=306.87)
sinx=(-10+70)/100=0.6
x=sin⁻¹ 0.6=36.87º
The solutions when 0≤x≤360º are: 36.87º and 306.87º.
Answer:
the answer for x-y=(-2) is x=y−2 the answer for x-y=2 is x=2+y
Step-by-step explanation:
hope this helps if not let me know
Answer:
A. Division property of inequality
Step-by-step explanation:,
If a, b and c are any real numbers,
By the division property of inequality,
a = b ⇒
,
By the inverse property of multiplication,

where, 1 is multiplication identity.
By the subtraction property of inequality,
a = b ⇒ a - c = b - c
By transitive property of inequality,
a = b and b = c ⇒ a = c,
Thus, it is clear that,
Division property of inequality is used in step 4.
Option A is correct.