Answer:
cost of 1 kg of washing powder is $1.2
Step-by-step explanation:
9 kg = $10.80
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cost for 1 kg =
Do elimination
2x + y = 3
x - y = 3
Add these
3x = 6
X = 2
Plug in 2 for x
4(2) + 2y = 6
8 + 2y = 6
2y = -2
X = 2, y = -1
You can see that the area of the blue rug is 2*2 or 4. The area of the rug needed to cover the stain will have to be 4*4 or 16. This means that the original rug will need to be dilated by 4 to cover the stain (4 (original) times 4 = 16 (new))
There is 2 answers + and -. The i represents a imaginary number... the answer is 6+2i, 6-2i.
Answer:
50%
Step-by-step explanation:
1- get the difference between the two numbers:
difference = 1.8 - 1.2 = 0.6 mg
2- divide the difference by the original number and then multiply the quotient by 100 to get the percentage
% of increase = (0.6/1.2) * 100 = 50%
