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Papessa [141]
3 years ago
9

Help, For each equation, use guess-check-and-improve to approximate a

Mathematics
1 answer:
Contact [7]3 years ago
3 0

Answer:

B) 6

Step-by-step explanation:

3(6) + 8 = 26

18 + 8 = 26

26 = 26

I don't know that method they are referring to. Seems pointless.

Typically, you would just set that equation up like:

3n + 8 = 26

    - 8      -8

3n = 18

3n/3 = 18/3

n = 6

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Factor completely x^4-17x^2+16​
Snowcat [4.5K]

Answer:

(x - 1) (x + 1) (x - 4) (x + 4)

Step-by-step explanation:

actor the following:

x^4 - 17 x^2 + 16

x^4 - 17 x^2 + 16 = (x^2)^2 - 17 x^2 + 16:

(x^2)^2 - 17 x^2 + 16

The factors of 16 that sum to -17 are -1 and -16. So, (x^2)^2 - 17 x^2 + 16 = (x^2 - 1) (x^2 - 16):

(x^2 - 1) (x^2 - 16)

x^2 - 16 = x^2 - 4^2:

(x^2 - 1) (x^2 - 4^2)

Factor the difference of two squares. x^2 - 4^2 = (x - 4) (x + 4):

(x - 4) (x + 4) (x^2 - 1)

x^2 - 1 = x^2 - 1^2:

(x^2 - 1^2) (x - 4) (x + 4)

Factor the difference of two squares. x^2 - 1^2 = (x - 1) (x + 1):

Answer: (x - 1) (x + 1) (x - 4) (x + 4)

4 0
3 years ago
What is the best estimate of 42% of 756?<br><br> a)320<br><br> b)240<br><br> c)400<br><br> d)400
nataly862011 [7]
320 i believe... the original answer was 317.52
4 0
2 years ago
Read 2 more answers
Prove the theorem (AB )^T= B^T. A^T
Lisa [10]

Answer:

(AB)^T = B^T.A^T  (Proved)

Step-by-step explanation:

Given  (AB )^T= B^T. A^T;

To prove this expression, we need to apply multiplication law, power law and division law of indices respectively, as shown below.

(AB)^T = B^T.A^T\\\\Start, from \ Right \ hand \ side\\\\B^T.A^T = \frac{B^T.A^T}{A^T}.\frac{B^T.A^T}{B^T} (multiply \ through) \\\\                = \frac{A^{2T}.B^{2T}}{A^T.B^T} \\\\=\frac{(AB)^{2T}}{(AB)^T} \ \ (factor \ out \ the power)\\\\= (AB)^{2T-T}  \ (apply \ division \ law \ of \ indices; \ \frac{x^a}{x^b} = x^{a-b})\\\\= (AB)^T \ (Proved)

3 0
3 years ago
Question 1<br> Solve: 25.6 - 5y + 15. 3
QveST [7]

Answer:

40.9 - 5y

Step-by-step explanation:

25.6 - 5y + 15.3

40.9 - 5y ## ^ combine like-terms

8 0
3 years ago
What percentage of the whole school are 7th grade students? Round to the nearest tenth of a
11111nata11111 [884]

Answer:

How many kids are there in the whole school and how many are seventh graders? This question is not complete. Please complete it thank you.

Step-by-step explanation:

6 0
2 years ago
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