3 years ago

5p coins weigh approximately 3 grams what would be the weight of the £5 worth of 5p coins give your answer in kilograms

Mathematics

1 answer:

Sidana [21]3 years ago

7 0

0.300 kilograms it is

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prisoha [69]

Hi there!

We can use the FOIL technique to find our answer.
$(x + 2)(x + 4) ={x}^{2} + 6x + 8\\ \\ first \: = x \times x = {x}^{2} \\ outside \: = x \times 4 = 4x \\ inside \: 2 \times x = 2x \\ last \: = 2 \times 4 = 8 \\ \\ answer \\ (x + 2)(x + 4) = {x}^{2} + 2x + 4x + 8 \\ \\ collect \: terms \: to \: get \: final \: answer \\ {x}^{2} + 2x + 4x + 8 ={x}^{2} + 6x + 8$

~ Hope this helps you!

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Salsk061 [2.6K]

Just use the order of operations. PEMDAS, parentheses, exponents, multiplication, division, addition and subtraction.

In the first problem 2 + 6*3^2, there are no parentheses, so next would be exponents.
There is an exponent so you do that first.
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Now we have 2 + 6*9
Multiplication is next and it is in the problem, so we do 6*9 = 54
So now we have 2 + 54 which equals 56.

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