Your answer would be
70a + 21b
Answer:
30 ml of 45% salt solution and 20 ml of 30% salt solution.
Step-by-step explanation:
Let x be the amount of 45% salt solution and y be the amount of 30% salt solution
the two equation will be:
x+y=60 -- A
0.45x+0.3y=0.4(60) -- B
Solve by substitution
Rewrite Equation A
x+y=60
x=60-y --- C
Substitute C into B
0.45(60-y)+0.3y=24
27-0.45y+0.3y=24
-0.15y=-3
y=20
<u>Substitute</u> the y=20 into equation C
x=60-20
x=30
Therefore, there was 30 ml of 45% salt solution and 20 ml of 30% salt solution.
Answer:
12
Step-by-step explanation:
23.) x=2
24.)same
25.)x=3
26.)x=2
27.)x=3
28.)x= -35/11
Answer:
T=6 if S is equal to 7 you can solve it with 6×7 or 7÷42
Step-by-step explanation:
because 6×7=42
