Answer:
-20x / (x-12) = y
Step-by-step explanation:
3/x - 5/y = 1/4
Multiply each side by 4xy to clear the fractions
4xy ( 3/x - 5/y = 1/4)
Distribute
12y - 20x = xy
Subtract 12y from each side
-20x = xy -12y
Factor out y
-20x = y(x-12)
Divide each side by (x-12)
-20x / (x-12) = y
Answer:
12 marbles are blue.
Step-by-step explanation:
3 x 4 = 12, so 40 % of 30 is 12.
Answer:
Step-by-step explanation:
In acidic reaction , equivalent weight of potassium dichromate is
mol weight / 6
= 294 / 6
49 g
equivalent weight of alcohol = 46 g
31.05 cc of .06M of potassium dichromate
= 31.05 x .06 cc of M potassium dichromate
= 1.863 cc of M potassium dichromate
= 1.863 x 6 cc of N potassium dichromate
= 11.178 cc of N potassium dichromate
== 11.178 cc of N alcohol
= (11.178 / 1000 ) x equivalent weight of alcohol
= (11.178 / 1000 ) x 46 g
= .514 g
30 g of blood contains .514 g of alcohol
100 g of blood contains (0.514 / 30) x 100
= 1.71 % of alcohol.
Answer:
a. 9/10
b. 3/4
c. 1/3
d. 1/15
e. 6/35
f. 1/15
g. 9/32
h. 4/15
Step-by-step explanation:
a. 
b. 
c. 
d. 
e. 
f. 
g. 
h. 