3 years ago

Need help with questions like this please message me if you can help

Mathematics

1 answer:

natulia [17]3 years ago

8 0

9x^2-4x-3 and x=-2

= 9*(-2)^2 - 4*-2 - 3
= (9*4)+8-3
= 36+8-3
= 44-3
=41

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Solution:

Given that £440 is divided between David, Mark & Henry

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Let "m" be the share of mark

Let "h" be the share of henry

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Therefore,

share of david + share of mark + share of henry = 440

d + m + h = 440 ------- eqn 1

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m = 3h

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Substitute eqn 2 and eqn 3 in eqn 1

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