2 years ago

Who kno the answer ? Please help

Mathematics

2 answers:

Aleks04 [339]2 years ago

4 0

It's the last one. .........

Naya [18.7K]2 years ago

3 0

Answer:

Step-by-step explanation:

√39(√6 + 7)

= √234 + 7√39

= √(9 × 26) + 7√39

= 3√26 + 7√39

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11/ 42 Marks

amm1812

Answer:

(a)x=128 degrees

(b) $\angle APD\neq 116^\circ$

Step-by-step explanation:

$\angle ABD+\angle CBD =180^\circ$ (Linear Postulate)\\\angle ABD+116^\circ =180^\circ\\\angle ABD=180^\circ-116^\circ\\\angle ABD=64^\circ$

(a) Now:

$\angle AOD=2 \times \angle ABD$ (Angle at the centre is twice the angle at the circumference)\\x=2 \times 64^\circ\\x=128^\circ$

(b)

$\angle APD=2 \times \angle ABD$ (Inscribed Angle Theorem)\\\angle APD=2 \times 64^\circ\\ \angle APD=128^\circ$

$\angle APD\neq 116^\circ$

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