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2 years ago

Which expression has a value of 15 when n= 7? 43-5 O 31-5 O on-28 28 019- n

Mathematics

1 answer:

Levart [38]2 years ago

8 0

Answer:

19- 28 over N

Step-by-step explanation:

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Explain how to work out these type of questions please!

bixtya [17]

$x = 9 \times 5 \\ x = 45$
Hope this helps. - M

7 0

3 years ago

Read 2 more answers

What is the value of 3 1/2 - 9 3/4

soldi70 [24.7K]

The value or outcome would be -6.25 .

8 0

2 years ago

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Expand the following:<br> a) x(x + 2)<br> b) x(2x - 5)<br> c) 2x(3x + 4)<br> d) 6x(x - 2)

TEA [102]

Answer:

solution,

$a. \: x(x + 2) \\ \: \: = x \times x + 2 \times x \\ \: \: = {x}^{2} + 2x$

$b . \: x(2x - 5) \\ \: = x \times 2x - x \times 5 \\ \: \: = 2 {x}^{2} - 5x$

$c. \: 2x(3x + 4) \\ \: = 2x \times 3x + 2x \times 4 \\ \: \: = 6 {x}^{2} + 8x$

$d. \: 6x(x - 2) \\ \: \: = 6x \times x - 6x \times 2 \\ \: \: = 6 {x}^{2} - 12x$

Hope this helps...

Good luck on your assignment..

4 0

3 years ago

I need help with a question

kondaur [170]

What question do you need help with

5 0

3 years ago

Which expression is equivalent to *picture attached*

Sedbober [7]

Answer:

$\sum_{n=3}^{20}(n(n+1))=\sum _{n=3}^{20} n^2+ \sum _{n=3}^{20} n$

Step-by-step explanation:

Given expression : $\sum_{n=3}^{20}(n(n+1))$

Solving further :

$\Rightarrow \sum_{n=3}^{20}(n^2+n)$

$\Rightarrow \sum _{n=3}^{20} n^2+ \sum _{n=3}^{20} n$

So, $\sum_{n=3}^{20}(n(n+1))=\sum _{n=3}^{20} n^2+ \sum _{n=3}^{20} n$

So, The given expression is equivalent to Option A

So, Option A is the answer

7 0

3 years ago