Answer:
4m² + 28m
A. Yes
Step-by-step explanation:
12m(3m+21) = 3(4m)[3(m+7)]
= 9(4m)(m+7)
= 9(4m²+28m)
Since 9 is a factor, it is divisible by 9
A ) cos² x · 1 / sin x - 1 / sin x = - sin x
cos² x - 1 / sin x = - sin x
- sin² x / sin x = - sin x
- sin x = - sin x ( correct )
B ) sin x ( cos x / sin x + sin x / cos x ) = 1 / cos x
sin x · ( cos² x + sin²x ) / sin x cos x = 1 / cos x
sin x · 1 / sin x cos x = 1 / cos x
1 / cos x = 1 / cos x ( correct )
C ) cos² x - sin² x = 1 - 2 sin² x
1 - sin² x - sin² x = 1 - 2 sin² x
1 - 2 sin² x = 1 - 2 sin² x ( correct )
D ) 1/sin²x + 1/ cos²x = 1
cos²x + sin² x / sin² x cos² x = 1
1 / cos² x sin² x = 1
cos²x sin² x ≠ 1
Answer: D ) is not an identity.
Answer:
Step-by-step explanation:
y = x + 95
y = 42 + 95
y=137 mm Hg
A. $44.91
7 5/8 = 7×8 + 5
= 61/8
= 7.625
since a yard costs 5.89
then 7.625 yards will cost
= 7.625 × 5.89
= $44.91
