Andy: $45
Ben: $33
Cathy: $99
a+b+c=177
c=3b
a=b+12
b+12+b+3b=177
5b+12=177
-12 -12
-----------------
5b=165
---- -----
5 5
b=33
It may be a because it is rational and they have different ones
Answer:
#1
<u>The depth of each box:</u>
- 3 m / 15 =
- 300 cm / 15 =
- 20 cm
#2
<u>The error is:</u>
<u>The percentage error:</u>
$6.39/3 bags = x dollars/1 bag
x dollars = $6.39/3 bags = $2.13 : 1 bag
Convert percentages to units.
100% - 20% = 80% = 0.8
100% - 25% = 75% = 0.75
Then multiply those together:
0.8*0.75=0.6=60%
100% - 60% = 40%. That's the overall price percentage reduction.
P.S. You can convert percentages to units by diving % by 100 for example 100% divided by 100 is equal to 1.
And vice versa aka multiply units by 100 and you get %, for example 0.8 times 100 is 80%