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Anastasy [175]
2 years ago
11

The name of every student taking Algebra was listed alphabetically and numbered. The teacher uses

Mathematics
1 answer:
baherus [9]2 years ago
4 0

Answer:

The number will be -63

Step-by-step explanation:

Here, we want to give the number of the chosen 25th student

We can see that the numbering follows an arithmetic sequence where a = 9 and d which is the common difference is (6-9) = -3

Mathematically, we can calculate the nth term using the equation below;

Tn = a + (n-1)d

in this case, n = 25, a = 9 and d = -3

So we have

Tn = 9 + (25-1)-3

Tn = 9 -3(24)

Tn = 9-72

Tn = -63

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Kelli swam upstream for some distance in one hour. She then swam downstream the same river for the same distance in only 6 minut
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Answer:

6.11km/hr

Step-by-step explanation:

Let the speed that Kelli swims be represented by Y

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Swimming upstream takes a negative sign, hence:

1 hour ×( Y - 5) = Distance

Distance = Y - 5

She then swam downstream the same river for the same distance in only 6 minutes

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Converting 6 minutes to hour =

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6 minutes =

Cross Multiply

6/60 = 1/10 hour

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1/10 × (Y + 5)

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Equating both equations we have:

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Collect like terms

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Cross Multiply

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18Y = 110

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3 years ago
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Read 2 more answers
Find the value of x<br> (I need help with both of them pls)
Aleks04 [339]

Answer:

1. x = 21

2. x = 19

Step-by-step explanation:

Since the interior angles of all quadrilaterals add up to 360, all we have to do is add them up and set them equal to 360. Combine like terms and we get

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For the second problem, it's the same thing

By the end we get 2x + 8 = 46

2x = 38

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Hope this helps

6 0
2 years ago
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