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3 years ago

15. -2 (a - 4) = 13

Mathematics

2 answers:

iogann1982 [59]3 years ago

8 0

Answer:

a=-22

Step-by-step explanation:

Multiply both sides of the negative equation by (-2) to get the equation:

a-4=13(-2)

then simplify to get:

a-4=-26

then isolate the variable by addig 4 to both sides of the equation to get:

a=-26+4

simplify to get:

a=-22

Feliz [49]3 years ago

7 0

Answer:

The A equals 5. i think.

Step-by-step explanation:

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the first term of an arithmetic sequence is 10 and the sum of the first five terms is 250,find the sequence

Crazy boy [7]

Answer:

The sequence is:

10, 30, 50, 70, 90.....................

Step-by-step explanation:

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First term (a) = 10

Common difference (d) = ?

Sum of first 5 terms ( $S_{5}$ ) = 250

or, $\frac{n}{2} [{2a+(n-1)d}] = 250$

or, $\frac{5}{2} [2*10 + 4d]=250$

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3 years ago

15. -2 (a - 4) = 13​

15. -2 (a - 4) = 13