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3 years ago

Helppppp againnnnnnnnn

Mathematics

1 answer:

dangina [55]3 years ago

5 0

A.

$5-1=\boxed{4}\\\\10-5=\boxed{5}$

Not an arithmetic sequence.

B.

$-27-(-20)=-27+20=\boxed{-7}\\\\-34-(-27)=-34+27=\boxed{-7}$

An arithmetic sequence.

Answer B.

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Ignore my answer for b, but all the rest are correct. a: about 2.94 c:12.24 cm

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3 years ago

If the midpoint of A (a, b) and B(-9, 6) is M(-3, 5):<br> Find the value of a.

WINSTONCH [101]

Answer:

$\huge{ \fbox{ \text{3}}}$

Step-by-step explanation:

$\sf{A ( \: a \:, b \: )\: \longrightarrow{ \: (x1 \:, y1)}}$

$\sf{ \: B( - 9 \: 6) \: \longrightarrow{ (x2 \:, y2)}}$

$\boxed{ \sf{midpoint = ( \frac{x1 + x2}{2} \: , \frac{y1 + y2}{2} )}}$

$\mapsto{ \sf{( - 3 \:, 5 \: ) \: = \: ( \frac{a + ( - 9)}{2} \:, \frac{b + 6}{2}}})$

$\mapsto{ \sf{( - 3 \:, 5) \: = \: ( \: \frac{a - 9}{2} \:, \frac{b + 6}{2} )}}$

$\sf{ \mapsto{ - 3 = \frac{a - 9}{2} }}$

Solve for a

$\mapsto{ \sf{ - 6 = a - 9}}$

$\mapsto{ \sf{a - 9 = - 6}}$

$\mapsto{ \sf{a = - 6 + 9}}$

$\mapsto{ \sf{a = 3}}$

The value of a is 3

Hope I helped!

Best regards! :D

~ $\text{TheAnimeGirl}$

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Answer:

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Step-by-step explanation:

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4 years ago

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