Answer:
The answer is -6.
Step-by-step explanation:
To find the value of y in (3, y), plug in 3 for x in y = -(2x) and solve for y.
y = -(2(3))
y = -6
y = -6, so the answer is -6.
9514 1404 393
Answer:
- 100 mL of 75% solution
- 150 mL of pure alcohol
Step-by-step explanation:
Let x represent the quantity (in mL) of pure alcohol needed for the mix. Then the amount of 75% needed is (250-x). The amount of alcohol in the mixture is ...
1.00x +0.75(250 -x) = 0.90(250)
0.25x +187.5 = 225 . . simplify
0.25x = 37.5 . . . . . . . . subtract 187.5
x = 150 . . . . . . . . . . . . . divide by 0.25
(250 -x) = 100 . . . . mL of 75% solution
You need 100 mL of the 75% solution and 150 mL of pure alcohol to obtain the desired mixture.
Answer:
I think it is b
I hope it is right and have a lovely day
Answer:
Figure D is regular polygon.
