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fenix001 [56]
3 years ago
9

PLSSS HELP What is the formula for the following arithmetic sequence? -2, 3, 8, 13, ... an = -2n + 3 an = -2n + 7 an = 5n + 3 an

= 5n - 7
Mathematics
1 answer:
san4es73 [151]3 years ago
7 0

Answer:

  an = 5n -7

Step-by-step explanation:

Try the offered formulas with n= 1 and see which gives you the first term of the sequence.

<u>an = -2n +3</u>

  -2(1) +3 = 1 . . . . not -2

<u>an = -2n +7</u>

  -2(1) +7 = 5 . . . . not -2

<u>an = 5n +3</u>

  5(1) +3 = 8 . . . . not -2

<u>an = 5n -7</u>

  5(1) -7 = -2 . . . . this is the formula you want

_____

If you recognize the common difference of the sequence to be 5, then you can automatically eliminate any formulas that don't contain 5n.

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Step-by-step explanation:

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3 years ago
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erika estimates that she is 200 to 300 miles away from her destination. if her car travels 25 miles per gallon of gas and each g
DedPeter [7]

Answer:

32$ < x < 48$

Step-by-step explanation:

Erika estimates that her destination is between 200 and 300 miles away.

When we divide 200 with 25 miles we get 200/25 = 8 gallons

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When we multiply 8 · 4 = 32$ we get amount of money for destination

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7 0
3 years ago
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svlad2 [7]

Answer:

The area of the rectangle on the left side is

9cm \:  \times 4cm = 36 {cm}^{2}

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6cm \times 2cm = 12 {cm}^{2}

The total area of the composite figure will be

36 {cm}^{2}  + 12 {cm}^{2}  = 48 {cm}^{2}

Step-by-step explanation:

The area of any given rectangle can be found by multiplying the length of that rectangle by its width. The rectangle on the left side has a length of 9cm but the width is unknown. To find the width, we subtract 6cm from the width of the bottom rectangle: 10cm. And that gives us 4cm.

Therefore, we can now calculate the area to be: length × width = 9cm × 4cm = 36cm²//

The area of the bottom rectangle can be found similarly by multiplying the length: 2cm by the width: 6cm of that rectangle. And the result gives us: 2cm × 6cm = 12cm²//

The total area of the composite figure is calculated by adding the results from the left and bottom rectangles together. And that gives us: 36cm² + 12cm² = 48cm²//

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baherus [9]

Answer:

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Step-by-step explanation:

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Now number of mins worked in 15 days = 450×15

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6750÷60 = 112.50

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