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BartSMP [9]
2 years ago
14

Find out the sum by suitable arrangement. 1 + 2 + 3 + 4 + 5 + 95 + 96 + 97 + 98 + 99

Mathematics
2 answers:
Ksivusya [100]2 years ago
7 0

1 + 2 + 3 + 4 + 5 + 95 + 96 + 97 + 98 + 99. = 500

hoa [83]2 years ago
4 0

Answer:

500

Step-by-step explanation:

rearrange the sum as

(99 + 1) + (98 + 2) + (97 + 3) + (96 + 4) + (95 + 5)

= 100 + 100 + 100 + 1000 + 100

= 5 × 100

= 500

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Step-by-step explanation:

The rule for 90 degree clockwise rotation is (h,k) -> (k,-h). This means flip the x-value's sign and then switch x and y's position. For example E (-5,-2), first flip x's sign (5,-2) and then switch x and y's places (-2,5).

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Step-by-step explanation:

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4 0
2 years ago
Save Work out the size of angle AED.<br> b) Work out x
Mamont248 [21]

Answer:

x = 10°

Step-by-step explanation:

a). Since, opposite angles of a cyclic quadrilateral are supplementary angles"

   Therefore, in cyclic quadrilateral ABDE,

   m∠ABD + m∠AED = 180°

   110° + m∠AED = 180°

   m∠AED = 180° - 110°

                 = 70°

b). AD = ED [Given]

   m∠EAD = m∠AED [Since, opposite angles of equal sides are equal in measure]

   m∠EAD = m∠AED = 70°

   By triangle sum theorem in ΔABD,

   m∠BAD + m∠ABD + m∠ADB = 180°

   m∠BAD + 110° + 40° = 180°

   m∠BAD = 180 - 150

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    m∠AEB = 70° + 30°          

                  = 100°

    By triangle sum theorem in the large triangle,

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    x° + 100° + 70° = 180°

    x = 180 - 170

    x = 10°

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2 years ago
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