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2 years ago

Miss Lim bought some puzzles for her pupils in the Maths Club. She bought a total

Mathematics

1 answer:

xxMikexx [17]2 years ago

6 0

Answer:

She bought 24 Tangram puzzles

Step-by-step explanation:

Let the number of Tangram puzzles be t and the number of IQ puzzles be i

The sum of all the puzzles is 40;

i + t = 40 ••••••(i)

Cost of all Tangram puzzles at a cost of $4 per one will be;

4 * t = $4t

cost of all Iq puzzles at a cost of $2 per one is

2 * i = $2i

Sum

paid for all is $128

so;

4t + 2i = 128 •••••••(ii)

From equation i;

i = 40-t

Substitute into ii

4t + 2(40-t) = 128

4t + 80 - 2t = 128

2t = 128-80

2t = 48

t = 48/2

t = 24

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2 years ago

Find the sum of the first 6 terms of 3 - 6 + 12 + …

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Answer:

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Step-by-step explanation:

The sequence above is a geometric sequence.

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2 years ago

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2 years ago

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2 years ago

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Anna11 [10]

Answer:

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Step-by-step explanation:

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2 years ago