Determine the correct scientific notation form of the number. 0.00000000165 a) 1.65 x 10−2 eliminate b) 165 x 10−7 c) 16.5 x 10−8 d) 1.65 x 10−9

The answer would be D.)1.65 x 10-9.

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don't know what that says sorry i can't you

step-by-step explanation:

idk what it says

x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x

step-by-step explanation:

last month maria hiked the 5-mile mountain trail a number of times and she hiked the 10-mile canal trail several times. let x represent the number of times she hiked the 5-mile trail, and let y represent the number of times she hiked the 10-mile trail. if she hiked a total of 90 miles, which equation can be used to find the number of times maria hiked each trail? x + y = 90 5x – 10y = 90 90 – 10y = 5x 90 + 10y = 5x