Answer:
cos 15 degrees is your answer.
Answer choice (b)
1 liter = 1000 milliliters so we can find it out by taking 1000 ml and subtracting 375 ml from 1000 milliliters. 1000 - 375 = 625 milliliters left. Also, if they want the answer in liters, we can find this out since we know that 1 liter = 1000 milliliters.
Answer in liters and percent

This is saying we have .625 of a liter left or we have 62.5% left
Answer : Option A
Explanation:
we can clearly see that from x+ y=5 we can substitute y = 5-x in y = 9x^2
Option B is clearly incorrect x can not be y -5
Option C is incorrect because y can not be 5 +x
Option D is incorrect because its y = 9x^2 not y^2 =9x^2 so y can not be 3x
if its y^2 = 9x^2 then only implies y = 3x
Yes, because x turns to into 1/10.
18 = 6x + 18 -6x
18 = x + 18
0=x