3 years ago

Giving brainliest but has to be a actual answer

Mathematics

1 answer:

vaieri [72.5K]3 years ago

3 0

Answer:

2,800 Books to be the same.

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I need help with this question

RSB [31]

Answer:53km/h

Step-by-step explanation:

you divide 424 by 8 in order to find the unit rate or the amount of kilometers per hour

3 0

3 years ago

Solve the equation. Show all of your work. 1/59X + 60) = 2/3x- 2

vivado [14]

Step-by-step explanation:

1/5x+60=2/3x-2

subtract 1/5x from 2/3x

when you do that you should get 0.46x repeating

then you add two to 60

you should get 62

62=0.46x

divide x

you get 134.7

8 0

3 years ago

3 to the third power minus 2 times 3 plus 5

Dahasolnce [82]

Answer: 26

Step 1

$27-(2)(3)+5$

Step 2

$27-6+5$

Step 3

$21+5$

5 0

3 years ago

The sum of the first n terms of an arithmetic sequence is n/2(4n + 20).

lesantik [10]

Answer:

(a).

$S_{n} = \frac{n}{2} (4n + 20) \\ \\S _{n - 1} = \frac{(n - 1)}{2} (4n - 4 + 20) \\ \\ S _{n - 1} = \frac{(n - 1)}{2} (4n + 16) \\ \\S _{n - 1} = \frac{(n - 1)(4n + 16)}{2} \\ \\ { \boxed{S _{n - 1} = {2 {n}^{2} + 6n - 8}}} \\$

(b).

from general equation:

$S _{n - 1} = \frac{(n - 1)}{2} (4n + 16)$

first term is 4n

common difference:

$16 = \{(n - 1) - 1 \}d \\ 16 = (n - 2)d \\ d = \frac{16}{n - 2}$

8 0

3 years ago

Find the mean proportional between 4 and 16.

ludmilkaskok [199]

Answer:

Step-by-step explanation:

4 × 16= 64

√64 = 8

hope this helps...

7 0

3 years ago

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