The first thing you must do is find 10% of 2400. To do this you divide by ten (to gets the 100% to 10%). This means that 10% is 240. You now must get from 10% to 40% which means multiply by 4, so that the final answer is 960. You could also multiply 2400 by 0.4.
So the square root of the quatity(x+7)=x-5
so you square both sides and get rid of the square root
x+7=(x-5)^2
(x-5)^2=x^2-10x+25
x+7=x^2-10x+25
subtract 7 from both sides
x=x^2-10x+18
subtract x from both sides
0=x^2-11x+18
so if xy=0 we can assume that x or/and y =0
factor out x^2-11+18
(find what two numbers multiply to get 18 and add to get -11)
-2 times -9=18
-2+(-9)=-11
(x-2)(x-9)=0
set them to zero
x-2=0
x=2
x-9=0
x=9
there are two answers -2 and -9
Answer:
12 bags
Step-by-step explanation:
3 pounds = 48 ounces
48 ÷ 4 = 12
