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dimaraw [331]
3 years ago
13

Help!Is there alternative way in solving a arithmetic sequence?​

Mathematics
1 answer:
mrs_skeptik [129]3 years ago
5 0

Answer:

{ \boxed{ \blue{ \tt{last \: term : l = a + (n - 1)d}}}} \\ \\  { \boxed{ \green{ \tt{sum : s =  \frac{n}{2} (2a + (n - 1)d}}}} \\  or\\ { \boxed{ \tt{ \red{sum : s =  \frac{n}{2} (a + l)}}}} \\ { \bf{s \: is \: sum }} \\ { \bf{ l \: is \: last \: term}} \\{ \bf{ n \: is \: number \: of \: terms}} \\{ \bf{ d \: is \: common \: difference}} \\  \\ { \underline{ \blue{ \tt{becker \: jnr}}}}

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Solve x-18 = -5. Also, can you explain it to me, thanks?
REY [17]

You need to solve for x (get x by itself)

x - 18 = -5    Add 18 on both sides

x - 18 + 18 = -5 + 18

x = 13

8 0
4 years ago
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Find the length of MN
serg [7]

Answer:

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3 years ago
moshde runs a hairstyling business from her home. she charges $40 for a haircut and style. her monthly expenses are $910. she wa
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Answer:

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3 years ago
4x – 3 = 2x + 7<br><br><br><br><br><br>.<br>..,........,.......​
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Answer:

x = 5

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