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creativ13 [48]
3 years ago
7

Plz help on rationalising surds

Mathematics
1 answer:
Fittoniya [83]3 years ago
3 0
(√5 + 3)² / √20=
((√5 + 3)² / √20)(√20/√20)=
(√20(√5 + 3)²) / (√20)²=
√20(5+6√5+9) /20=
√20 (14+6√5) /20=
(14√20 +6√100) /20=
(14√20 +60) / 20=
(14(√4√5) + 60) /20=
(14(2)(√5)+60) / 20=
(28√5+60) /20=
(7√5+15) / 5

Answer:(√5 + 3)² / √20= <span>(7√5+15) / 5</span>
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Answer:

(10x - 5) square units.

Step-by-step explanation:

Let the lengths of equal sides be x units.

Hence, AB + AD + DC = x + x + x = 3x

Therefore, BC = 3x - 2

Area  \: of \:  trapezoid  \\ =  \frac{1}{2} (AD + BC)  \times 5 \\  = \frac{1}{2} (x + 3x - 2)  \times 5  \\ = \frac{1}{2} (4x - 2)  \times 5  \\ = \frac{1}{2} \times 2 (2x - 1)  \times 5  \\  = (2x - 1) \times 5 \\  = (10x - 5) \:  {units}^{2}

5 0
3 years ago
How many paychecks do you get a year if you're paid semimonthly?
hjlf
Semi --> twice
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Thus:
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6 0
2 years ago
Factorise p^2 + q^2 +5(p^2 + q^2)​
Vinvika [58]

Step-by-step explanation:

p² + q² + 5(p² + q²)

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5 0
2 years ago
15s-100=350 Can someone answer please.
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Answer:

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Hope it helps:-)

3 0
3 years ago
Riverdale High ordered 84 shirts with their logo on them. if 8 of the shirts were defective what percent of the shirts were not
Ymorist [56]

8 were defective.

Defective percent = 8/84 x 100 = 9.5238% were defective.

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The question doesn’t say how to round the answer so you may need to round differently than I did.

8 0
2 years ago
Read 2 more answers
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