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vampirchik [111]
3 years ago
11

Factorise the following expression :​

Mathematics
1 answer:
Svetlanka [38]3 years ago
4 0

Answer:

(i)(a - 2y) (3x - 4b)

(iii) (m - n)(m + 4)

Step-by-step explanation:

(i)

3ax - 6xy + 8by - 4ab

= 3x (a - 2y) - 4b (-2y + a)

= 3x (a - 2y) - 4b (a - 2y)

= (a - 2y) (3x - 4b)

(iii)

{m}^{2}  - mn + 4m - 4n \\  \\  = m(m - n) + 4(m - n) \\  \\  = (m - n)(m + 4)

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Answer:

<u>Oliver and Lenny reached the top of the hill at the same time</u>

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Oliver's speed = 5 km/h during the first half, then decreased his speed to 4 km/h during the second half.

Lenny's speed = 4 km/h during the first half, then increased his speed to 5 km/h in the second half.

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Lenny = Time of hiking first 5 km + Time of hiking second 5 km

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Jolene invests her savings in two bank accounts, one paying 4 percent and the other paying 10 percent simple interest per year.
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Answer:

<h2>$ 22200 in higher yielding bank and $ 44400 in lower yielding bank</h2>

Step-by-step explanation:

       Jolene invests in two bank accounts. The first account gives a 4% interest per year and the second bank gives a 10% interest rate per year.

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