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3 years ago

What numbers have a sum of 20 and the difference is 4

Mathematics

2 answers:

kvv77 [185]3 years ago

8 0

Answer:

The numbers are 12 and 8

Step-by-step explanation:

let the numbers be x and y :

$x + y = 20 - - - (a) \\ x - y = 4 - - - (b)$

add (a) and (b):

$2x + 0y = 24 \\ 2x = 24 \\ x = 12$

find y:

$x + y = 20 \\ 12 + y = 20 \\ y = 20 - 12 \\ y = 8$

balu736 [363]3 years ago

6 0

Answer:

16 and 2

Step-by-step explanation:

I'm not sure honestly if this is correct, but I hope this helps.

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ivolga24 [154]

Answer:

$x = 15$

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Step-by-step explanation:

Given

See attachment for MNPQ and RSTU

Required

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To solve this question, we make use of equivalent ratios of corresponding side lengths.

The ratio of corresponding sides are:

$MN : RS$

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From the attachment, we have:

$MN : RS \to 18 : 30$

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Express as fraction

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Make x the subject

$x = 25 * \frac{18 }{ 30 }$

$x = \frac{25 * 18 }{ 30 }$

$x = \frac{450}{ 30 }$

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Express as fraction

$\frac{18 }{ 30 }= \frac{15 }{ y}$

Make y the subject

$y = 15 * \frac{30 }{ 18 }$

$y = \frac{15 *30}{ 18 }$

$y = \frac{450}{ 18 }$

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Answer:

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Step-by-step explanation:

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