The question is in the picture please help if can I will be really grateful
1 answer:
The factor (x-9) is negative for x < 9. It is zero for x = 9.
The factor (7x+2) is negative for x < -2/7.
The factors have different signs for -2/7 < x < 9. When their signs are different, their ratio is less than zero. When x = 9, the ratio is equal to zero.
The appropriate choice is the graph that shows -2/7 < x ≤ 9.
The factor (7x+2) is negative for x < -2/7.
The factors have different signs for -2/7 < x < 9. When their signs are different, their ratio is less than zero. When x = 9, the ratio is equal to zero.
The appropriate choice is the graph that shows -2/7 < x ≤ 9.
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Answer:
-¹²/₅
Step-by-step explanation:
Let cos a = -⁵/₁₃
Then tan a = sin a/cos a
= [√(1 - cos²a)]/cos a
= {√[1 - (-⁵/₁₃)²]}/(-⁵/₁₃)
= -[√(1 - ²⁵/₁₆₉)] × ¹³/₅
= -[(√(¹⁴⁴/₁₆₉ )] × ¹³/₅
= -¹²/₁₃ × ¹³/₅
= -¹²/₅
tan(arccos (-⁵/₁₃)) = -¹²/₅
The diagram shows the 2nd quadrant of a circle with radius 13, cos a = -⁵/₁₃, and tan a = ¹²/₍₋₅₎ = -¹²/₅.
You need to use the equation for adding fractions, which is
In this case, a=-1, b=3, c=-3, d=5.
simplify
answer: