Answer:
25
+5ab+
Step-by-step explanation:

1. First, write out the expression without the square

2. Then use foil to multiply:
5a*5a+5a*
+
*5a+
*
=25
+5ab+
3. That is your answer.
Not sure is this is right but if the chemist wants to make the solution 35% acidic then he can use all of the 30% acid and 5% of the 45% acid.
Answer:
5x + 8
Step-by-step explanation:
it just is
2 out of 50 were tagged.
Divide 2 by 50:
2/50 = 0.4 ( This is 4% of the fish were tagged).
Now divide the number of fish caught by the percentage that were tagged:
50 / 0.04 = 1250
The number of fish in the pond is C. 1250
Answer:
40
Step-by-step explanation:
let ones be x
tens is 4 + 2x
4 + 2x + x = 4
3x = 0
x = 0
tens is 4 + 2*0
tens = 4
40 candy canes