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Pie
3 years ago
7

Cream cheese costs £4.50 for 1kg.

Mathematics
2 answers:
frosja888 [35]3 years ago
6 0

Answer: £2.70

Step-by-step explanation:

Recall :

1000g = 1kg

That is :

1000g of cream cost £4.50  , then

1 g of cream will cost £4.50/1000

which means 1g cost £0.0045

Therefore:

600g of cream cheese will cost 600 x £0.0045

that is :

600g of cream cheese cost £2.70

katen-ka-za [31]3 years ago
4 0

Answer:

£2.70

Step-by-step explanation:

4.5* 0.6= 2.70

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\huge\boxed{14\ \text{and}\ 7}

Step-by-step explanation:

n,\ m-\text{positive integer}\\\\n=2m-\text{a positive integer is twice another}\\\\\dfrac{1}{n}+\dfrac{1}{m}=\dfrac{3}{14}-\text{the sum of the reciprocal of the two positive integer is }\ \dfrac{3}{14}\\\\\text{We have the system of equations:}\\\\\left\{\begin{array}{ccc}n=2m&(1)\\\dfrac{1}{n}+\dfrac{1}{m}=\dfrac{3}{14}&(2)\end{array}\right

\text{Substitute (1) to (2):}\\\\\dfrac{1}{2m}+\dfrac{1}{m}=\dfrac{3}{14}\\\\\dfrac{1}{2m}+\dfrac{1\cdot2}{m\cdot2}=\dfrac{3}{14}\\\\\dfrac{1}{2m}+\dfrac{2}{2m}=\dfrac{3}{14}\\\\\dfrac{1+2}{2m}=\dfrac{3}{14}\\\\\dfrac{3}{2m}=\dfrac{3}{14}\Rightarrow2m=14\qquad\text{divide both sides by 2}\\\\\dfrac{2m}{2}=\dfrac{14}{2}\\\\\boxed{m=7}

\text{Substitute it to (1):}\\\\n=2\cdot7\\\\\boxed{n=14}

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