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Arlecino [84]
3 years ago
15

Which is equivalent to 8x−y+3x?

Mathematics
2 answers:
steposvetlana [31]3 years ago
6 0

Answer:

11x - y

Step-by-step explanation:

Tom [10]3 years ago
4 0
Answer: 11x - y = 8x - y + 3x
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Which value must be added to the expression x^2+x to make it a perfect-square trinomial? A.1/4 B.1/2 C.1 D.4
barxatty [35]

Hello from MrBillDoesMath!

Answer:

Choice A, 1/4


Discussion:

Consider the perfect square

        (x + a)^2 =   x^2 + (2a)x + a^2

The constant term (a^2) equals  1/2 the coefficient of x (i.e.  2a), squared.

Let's apply this idea to x^2 + x

x^2 + x =                                                    => as 2 * 1/2 = 1

x^2 + ( 2 * 1/2)x =

( x^2 + (2* 1/2)x +  ( 1/2) ^2 )  - (1/2) ^2  =    

    as constant term to add is 1/2 coefficient of x (that is, 1/2)  and

     (1/2)^2 - (1/2)^2 = 0

(x + 1/2) ^ 2  - (1/2)^2

In other words add the constant (1/2)^2 = 1/4, which is Choice A.


Thank you,

MrB

7 0
3 years ago
Select all that apply.
WINSTONCH [101]
I don’t understand the question can you give more detail
4 0
3 years ago
Read 2 more answers
If point P partitions the segment<br> AB in a 1:2 ratio, where is point P located?
Gwar [14]

If AP and PB are in a 1:2 ratio, it means that PB is twice AB.

So, AP must fit three times into AB, meaning that P must be at one third of the way between A and B.

6 0
3 years ago
Find the sum of a 22-term arithmetic sequence, where the first term is 7 and the last term is 240.
nikdorinn [45]

Answer:

The sum of the arithmetic series is 2717.

Step-by-step explanation:

The sum of an arithmetic sequence is given by:

\displaystyle S = \frac{k}{2}\left( a + x_k\right)

Where <em>k</em> is the number of terms, <em>a</em> is the initial term, and <em>x</em>_<em>k</em> is the last term.

There are 22 terms, the first term is 7, and the last term is 240. Hence, the sum is:

\displaystyle \begin{aligned} S &= \frac{(22)}{2}\left((7) + (240)} \\ \\ &= 11(247) \\ \\ &= 2717\end{aligned}

In conclusion, the sum of the arithmetic series is 2717.

3 0
3 years ago
Latoya drives 8 miles to work in 13 minutes what is her average rate
solmaris [256]
Her average rate is .615 miles per minute or about 37 miles per hour
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4 years ago
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