23. Call Ground level=0
First: Elevator goes down 2 floors: 0-2=-2
Next: Elevator goes down 3 more floors: -2-3=-5
Finally: Elevator goes up 6 floors: -5+6=1
The elevator is one floor higher than its original position.
b) Withdraw means to take out, deposit is to put money back in account.
$374-(3*$68)+(2*$50)=$474-$204=$270
24. Info given: Two sacks of potatoes have a mass of 168 grams total.
A+B=168
If I am interpreting the following wording correctly, (1/8)A+(3/4)B=76
To find the mass of sack A, we need to solve one equation for B to put in terms of A and then stick that in the second equation. Since the first equation is easier to deal with, we'll use that. Always use whichever equation is easier to get the variable by itself. It will make your math life a whole lot easier. So:
B=168-A
Now we put this in the second equation to get the equation they are asking for in part A:
(1/8)A+(3/4)(168-A)=76
Okay. Part a done. Now we just solve for A.
(1/8)A+(3/4)(168-A)=76
(1/8)A+(126)-(3/4)A=76
(1/8)A-(6/8)A=-50
(-5/8)A=-50
A=80 grams
Part C: A+B=168
80+B=168
B=88 grams
