All categories

3 years ago

Easy question asap!

Mathematics

2 answers:

PilotLPTM [1.2K]3 years ago

6 0

A bar graph would allow her to compare magnitude of temperature easily

blsea [12.9K]3 years ago

5 0

A - A bar graph would be most appropriate

You might be interested in

in Sean's fish tank there are six times as many goldfish as Guppies. There are a total of 21 fish in the tank. How many more gol

Verizon [17]

15 more. There are 3 guppies and 18 goldfish. Because 3+18=21 and 3x6=18

4 0

3 years ago

A stained glass window is going to be installed in a semi-circular opening, which is above a 30 inch wide door. If the stained g

krek1111 [17]

You will need half of the circle with radius of 15 inches.
Area of semi-circle = (πr^2)/2 = 353.25 x $1.40 = $494.55

8 0

2 years ago

Read 2 more answers

Andrea ran 400 meters in gym class How many cm. did she run

aliya0001 [1]

1 m = 100 cm

Multiply:

100 * 400 = 40000

So she ran 40,000 centimeters.

7 0

2 years ago

Find the nth term of the sequence 7,25,51,85,127

olya-2409 [2.1K]

Let a (n) denote the n-th term of the given sequence.

Check the forward differences, and denote the n-th difference by b (n). That is,

b (n) = a (n + 1) - a (n)

These so-called first differences are

b (1) = a (2) - a (1) = 25 - 7 = 18

b (2) = a (3) - a (2) = 51 - 25 = 26

b (3) = a (4) - a (3) = 85 - 51 = 34

b (4) = a (5) - a (4) = 127 - 85 = 42

Now consider this sequence of differences,

18, 26, 34, 42, …

and notice that the difference between consecutive terms in this sequence b is 8:

26 - 18 = 8

34 - 26 = 8

42 - 34 = 8

and so on. This means b is an arithmetic sequence, and in particular follows the rule

b (n) = 18 + 8 (n - 1) = 8n + 10

for n ≥ 1.

So we have

a (n + 1) - a (n) = 8n + 10

or, replacing n + 1 with n,

a (n) = a (n - 1) + 8 (n - 1) + 10

a (n) = a (n - 1) + 8n + 2

We can solve for a (n) by iteratively substituting:

a (n) = [a (n - 2) + 8 (n - 1) + 2] + 8n + 2

a (n) = a (n - 2) + 8 (n + (n - 1)) + 2×2

a (n) = [a (n - 3) + 8 (n - 2) + 2] + 8 (n + (n - 1)) + 2×2

a (n) = a (n - 3) + 8 (n + (n - 1) + (n - 2)) + 3×2

and so on. The pattern should be clear; we end up with

a (n) = a (1) + 8 (n + (n - 1) + … + 3 + 2) + (n - 1)×2

The middle group is the sum,

$\displaystyle 8\sum_{k=2}^nk=8\sum_{k=1}^nk-8=\frac{8n(n+1)}2-8=4n^2+4n-8$

so that

a (n) = a (1) + (4n ² + 4n - 8) + 2 (n - 1)

a (n) = 4n ² + 6n - 3

4 0

3 years ago

Give an example of a pair of independent event.

Nutka1998 [239]

(me brushing my teeth) and (you going to school)

3 0

3 years ago