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jeka57 [31]
3 years ago
8

6. Which expressions are equivalent to 9x?

Mathematics
1 answer:
Umnica [9.8K]3 years ago
6 0

Answer:

A. & D.

Step-by-step explanation:

A. 8x + x = 9x

B. 9x + x = 10x

C. 10 - x = 10 - x (not like terms)

D. 5x + x + 3x = 9x

E. 7x + x + 2x = 10x

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An arithmetic series a consists of consecutive integers that are multiples of 4 what is the sum of the first 9 terms of this seq
frez [133]
<h3>Answer: 144</h3><h3>Step-by-step explanation:</h3><h3 />

Since, the first 9 multiple of 4 starts from 0 are,

0, 4, 8, 12, 16, 20, ................

Which is an AP,

Having the first term, a_1 = 0

And, the successive difference, d = 4,

Since, the sum of the n term of an AP,

S_n = \frac{n}{2}[2a + (n-1)d]

Hence the sum of 9 term of the above AP,

S_9 = \frac{9}{2}[2\times 0 + (9-1)\times 4]

S_9 = \frac{9}{2}(0 + 8\times 4)

S_9 = \frac{9}{2}(32)

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6 0
3 years ago
Which graphs show a proportional relationship? Select all that apply.
BlackZzzverrR [31]

Answer:

A, D

Step-by-step explanation:

The graph of a proportional relation is a straight line that passes through the origin.

Answer: A, D

6 0
3 years ago
I need help with this this is hard
saveliy_v [14]

Answer:

n > -6 and n < 8! Heart it if it was helpful :D

Step-by-step explanation:

Okay! So n has to be bigger than -6, but smaller than 8. So the inequalities are n > -6 and n < 8!

8 0
3 years ago
Read 2 more answers
the perimeter of a parallelogram is 72 meter. the width of the parallelogram is 4 meters less than its length. find the length a
xz_007 [3.2K]
"<span>Start by setting up the standard equation for perimeter of a parallelogram, P=2w+2h (these variables of course being width and height). </span>
Now, substitute in what you know...

<span>The problem tells us that width is equal to height minus four. This means that, in order to keep only one variable in this problem, we will write width as h-4. </span>
<span>The problem also tells us that 72 is the perimeter, so we substitute that for P. </span>

72=2(h-4)+2h
<span>Now solve from here. </span>
<span>(Distribute first) </span>
72=2h-8+2h
(Combine like terms)
72=4h-8
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(Isolate h)
80/4=h
<span>20=h"</span>
6 0
3 years ago
Why do we have to perform a closing procedure in the account cycle?
Finger [1]

Answer:

no

Step-by-step explanation:

7 0
4 years ago
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