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kirill115 [55]
3 years ago
13

Seven cakes cost £3.50 how many if there is five?

Mathematics
2 answers:
katovenus [111]3 years ago
8 0
3.50(5)= 17.5  You would take the 3.50 and multiply it by 5
bogdanovich [222]3 years ago
3 0
3.50÷7 = £0.50 per cake
5 cakes = 0.5 x 5 = £2.50
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Ivanshal [37]

Answer:

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Step-by-step explanation:

The easiest way is to guess. We know that you can't have a square root of a negative number. This constrains x between negative infinity to 2. Testing 2 and -2, we see that it satisfy the equation.

The more systematic approach is shown below

\sqrt{5-2x}-\sqrt{2-x}=1 \\\sqrt{5-2x}-\sqrt{2-x}+\sqrt{2-x}=1+\sqrt{2-x} \\\sqrt{5-2x} = 1+\sqrt{2-x}

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x= -2, 2

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3 years ago
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Ivenika [448]
<span>0.5p - 3.45 = -1.2 ⇒ p=4.5</span>
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