Answer:
The answer is d.
Step-by-step explanation:
As we know, sin x= cos (90°-x)
sin 18° = cos (90°-18°)
= cos 72°.
Similarly, sin 72°= cos (90°-72°)
= cos 18°
But, sin 55°= cos (90°-55°)
= cos 35°
7x+3(x-2)4x+8=
<span>
Distributive property
7x + 3x - 6 -4x + 8
Combining like terms
10x - 6 -4x + 8
6x - 6 + 8
Combine numbers
6x + 2 </span>
Hope i helped:D
Answer:
-54
Step-by-step explanation:

Multiply 8 by -9 and 6 by -3

Subtract
Hope this helps
plz mark brainliest
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Step-by-step explanation: