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3 years ago

Please answer (-4) + (-5)

Mathematics

1 answer:

sertanlavr [38]3 years ago

7 0

-9

There are the same signs so you'd just add them together and use whatever sign they are..

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I do not understand what subscript numbers mean

alekssr [168]

Answer:

subscripts identify different instances of objects that have a similar meaning or definition

Step-by-step explanation:

You apparently are interested in the meaning of the subscript N in the explicit formula ...

$A_N=\dfrac{7N}{N+5}$

Here, it is used to identify different terms of a sequence. When a value is substituted for N, it replaces all instances of N. Using your example, the first three values of $A_N$ are ...

$\text{for N=1: }A_1=\dfrac{7\cdot 1}{1+5}=\dfrac{7}{6}\\\\\text{for N=2: }A_2=\dfrac{7\cdot 2}{2+5}=\dfrac{14}{7}=2\\\\\text{for N=3: }A_3=\dfrac{7\cdot 3}{3+5}=\dfrac{21}{8}$

So, if you're asked to find the 20th term of the sequence, you put 20 where N is, then do the arithmetic.

Subscripts are also used to identify elements of a matrix or coordinates in multiple dimensions. For this purpose, there may be 2 (or more) subscripts, whose order has meaning. The subscripts 24, for example, in $A_{24}$ refer to row 2, column 4 of a matrix named A. That is, the subscripts are in row, column order.

In short, subscripts are used to identify different instances of similar objects.

6 0

3 years ago

Whats (x + 3) - (5x - 4)

djverab [1.8K]

Answer:

the answer is −4x+7

Step-by-step explanation:

yes

8 0

3 years ago

Read 2 more answers

What factors do 28 and 44 have in common?

mamaluj [8]

The factors of 28 is 1,2,4,7,28 and the factors of 44 is 1,2,4,11,22,28 so,they both have 2,4 in common

4 0

3 years ago

Please answer using the information provided (30 points for brainlyest)

Aleks [24]

$8.5(3.5 + x)$

$(8.5 \times 3.5) + (8.5 \times x)$

$29.75 + 8.5x$

I honestly don't know what to do for b. Maybe it tells us that the minimum area possible is 38.25 in²? or maybe it tells us that the area of just the original photo is 29.75 in²? I don't know.

7 0

3 years ago

Five added to a number gives the sum of 39. what is the unknown number?

gregori [183]

Answer:

The unknown number is 34.

Step-by-step explanation:

x+5=39

x=39-5

x=34

6 0

3 years ago