#GCSE Additional Maths - Inequalities

32 messages · Page 1 of 1 (latest)

sour mulch
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I've found the answer to (i) which is 4.5s and the answer to (ii) which is 1.25m but for (iii) i'm stuck

image.png
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I keep getting 2.4

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the answer is 2.53

high mirage
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Hmm I'm not 100% sure but I think u eill have yo complete the square then u will the deepest value for y

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Bcuz after completing the square u can get the turning points

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Nah but that won't get u the answer for c it's asking for her to be safe

rugged holly
high mirage
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Ooh so then ig

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U just need to find y

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Ig u plug in value for t and do it

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Nahh

rugged holly
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U expand completely and complete the square

high mirage
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Yeah I was thinking that too but that will give u the deepest point of the sea

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Now we need to find her deepest point

rugged holly
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No it gives u the deepest point she teachers

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Reaches

high mirage
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How

rugged holly
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The graph tracks her movement

high mirage
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The question oog yea it says her height

rugged holly
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It tells u her height y against time t

high mirage
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My bad😭😭

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Then it's just this way if I'm not wrong

high mirage
rugged holly
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The safest point <the minimum value of y

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NOT =<

high mirage
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Yea so u can wrote the water must be below the maximum value of y ? Or not ?

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Write *

rugged holly
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Ye

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U wld write it as an inequality

high mirage
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Yes

sour mulch
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nvm i found my mistake

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i didn't include the height before she hit the water