7.
10% = 6
25% = 15
50% = 30
20% = 12
_____________________
8.
a = 35
b = 105
c = 140
____________________________
9.
15 is 30% of 50.
_____________________________
10.
The punch recipe contains 25% lemonade:
24/6 = x/100
x=1/4 x 100 = 25%
_____________________________
11.
520
multiply 650 by 80 amd then divide by 100
or simply multiply 650 by 0.8
to get 520 students.
_______________________________________
12.
Number of items checked = 300
Defective items = 3%
Number of defective items =
Number of defective items =
Number of defective items = 9
Number of items worked = Total items - Number of defective items
Number of items worked = 300 - 9 = 291
291 items of checked items worked.
180=2x+y
180-y=2x
(180-y)/2=x
Answer:
8 minutes
Step-by-step explanation:
Since the level of the tank needs to be at two-thirds its original level, then this means that Andrew needs to drain only one-third of the fish tank. Therefore the amount of time it would take can easily be solved with this 2-step equation...
6t = 144 * 
.... first multiply the right side of the equation
6t = 48 ... next divide both sides by 6
t = 8
Finally, we can see that it will take Andrew 8 minutes to drain the tank to two-thirds of its original level.
Answer:
<em>9</em>
Step-by-step explanation:
2(5y°) = 90° ⇒ y = <em>9</em>
Answer 165
Step-by-step explanation:
i know
