Answer: 0.7893g//mL
If 20 mL of ethanol (density =0.7893g//mL) is mixed with 40mL water (density = 0.9971g//mL)
Step-by-step explanation:
9^2 + 12^2 = 225. the square root of 225 is 15. x=15
Answer:
Amount left = Rs 45
Step-by-step explanation:
Let the initial amount be x.
Translating the word problem into an algebraic expression, we have;


Cross-multiplying, we have;


Rearranging the equation (collecting like terms), we have;

x = Rs 60
Next, we find the amount left;
Amount left = 60 - 15
Amount left = Rs 45
The first two are already in slope intercept form. The third is y=2/5x-2. The fourth is y=4x+8.