4 years ago

PLEASE HELP question 30

Mathematics

1 answer:

weeeeeb [17]4 years ago

3 0

Answer:

Step-by-step explanation:

d+c=180 because 360 degrees are in the parrallegram so divide that by 2 so 114+c=180 so

c=66

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nordsb [41]

Let

x---------> represents Martin's sister's age

y--------> represents Martin's age

we know that

$y=x-6$ --------> equation $1$

$x+y\leq 22$ --------> equation $2$

Substitute equation $1$ in equation $2$

$x+[x-6]\leq 22\\2x\leq 22+6\\ x\leq 14$

therefore

<u>the answer is</u>

Part a) An inequality that can be used to represent this situation is

$x+[x-6]\leq 22$ or $x\leq 14$

Part b) the oldest age Martin's sister can be is $14$ years old

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