How do scientists use a spectroscope to determine a star's composition? a. they study patterns in light bands that are separated from starlight by the spectroscope. b. they use the spectroscope to study sound waves that are traveling from the star. c. they use the spectroscope to create a man-made star that they study in a lab. d. they run tests on gas samples that the spectroscope collects from the star's core.

Its actually A

Step-by-step explanation:

They study patterns in light bands that are seperated by starlightby the spectroscope

 They study patterns in light bands that are separated from starlight by the spectroscope.

Step-by-step explanation: Each element absorbs light at specific wavelengths unique to that atom. When astronomers look at an object's spectrum, they can determine its composition based on these wavelengths. The most common method astronomers use to determine the composition of stars, planets, and other objects is spectroscopy.

just do 5.2 + 2 ( 7.2) and 1/3 x 3 (.9) and youv'e got your equation. 0.9( 9/10) + 7.2 ^2 = 16.4 hope i could !

step-by-step explanation:

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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