When you solve an inequality, you should always be extra careful to check that you don't multiply it by a negative number - because if you do, then you have to change the sign!
So here, the mistake is in this step:
−9x≥ −36
x ≥ 1.
you should change the sign to ≥
x≤1!
Answer:
0.007 kg
Step-by-step explanation:
There are 25 packets
Each packet contains 4 biscuits.
The total number of biscuits = 4 * 25
The total number of biscuits = 100
100 biscuits = 0.7 kg
1 biscuit is 0.7 kg / 100
1 biscuit is 0.007 kg
If you are not sure of this, put it in a calculator.
Just out of curiosity note that 1 kg = 1000 grams
0.007 kg = 0.007 * 1000 = 7 grams each.
use 0.007 as your answer.
52m^2= 2[(x-5)+(x)]. 52m^2= 2(2x-5). 52m^2=4x-10