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11111nata11111 [884]
3 years ago
12

If the common differences of an Ap is 5, the value of a18-a13 is

Mathematics
1 answer:
Debora [2.8K]3 years ago
5 0

Answer:

25

Step-by-step explanation:

The n th term of an AP is

a_{n} = a₁ + (n- 1)d

where a₁ is the first term and d the common difference

Here d = 5, then

a₁₈ = a₁ + 17d = a₁ + 85

a₁₃ = a₁ + 12d = a₁ + 60

Thus

a₁₈ - a₁₃

= a₁ + 85 - a₁ - 60

= 25

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igomit [66]

y = 12x represents the gallons of paint used in x hours.

Step-by-step explanation:

CJ uses 3 gallons of paint in 15 minutes,

15 minutes = 3 gallons

1 minutes = \frac{3}{15} = \frac{1}{5} \ gallons\\

1 hour = 60 minutes

Gallons of paint used in 1 hour;

1 hour = \frac{1}{5}*60=12\ gallons

CJ uses 12 gallons of paint in 1 hour.

For x hours = 12*x = 12x

Gallons of paints used = y

y = 12x represents the gallons of paint used in x hours.

Keywords: linear equation, multiplication

Learn more about multiplication at:

  • brainly.com/question/10048445
  • brainly.com/question/10177389

#LearnwithBrainly

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3 years ago
What is (10x+8)-3(2x+8)8x(5x-2) simplified
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8 0
3 years ago
If x = 12 inches and y = 18 inches, where y is the height of each triangle of the pyramid, what is the surface area of the figur
Dafna11 [192]
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4 years ago
Gabe made $72 during a 8 hour work shift. Which equation represents how much Gabe makes per hour, h?
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B. 72= 8h
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8 0
3 years ago
Read 2 more answers
A rod 123.75 cm long is sawn into 16 equal lengths. If a wastage takes place of ¼ cm for each saw cut, what is the length of eac
Stells [14]

Answer:

7.5 cm

Step-by-step explanation:

A rod 123.75 cm long is sawn into 16 equal lengths.

The length of each rod is calculated as:

123.75cm/16 =

= 7.734375cm

If a wastage takes place of ¼ cm for each saw cut,

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7.734375cm - 1/4 cm

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7 0
3 years ago
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