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Korvikt [17]
3 years ago
9

Evaluate 2x^2-1 when x=3 A) 5 B) 17 C) 25 D) 35

Mathematics
2 answers:
natulia [17]3 years ago
8 0

Answer:

Step-by-step explanation:

gayaneshka [121]3 years ago
6 0
The answer to the question is b
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Rectangle A has length 12 and width 8. Rectangle B has length 15
Elza [17]

Answer:

To be for real I think its 2

Step-by-step explanation:

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4 years ago
Find the zeros of 7=x^2-8x-3 by completing the square
enot [183]

Using the completing the square method, for the equation, we have the zeros as <u>x = √26 + 4 and x = 4 - √26</u>

<h3>How can the zeros be found using completing the square method?</h3>

The given equation is presented as follows

7 = \mathbf{ {x}^{2}  - 8x - 3}

Which, by completing the square, gives;

{x}^{2}  - 8x - 3 - 7 = 0

{x}^{2}  - 8x - 10 = 0

{x}^{2}  - 8x  +   {\left(\frac{8}{2} \right) }^{2} - 10  -  {\left(\frac{8}{2} \right) }^{2} = 0

\mathbf{{(x - 4)}^{2} }   =26

The zeros of the equation;

7 =  {x}^{2}  - 8x - 3

are;

\underline{x = \pm \sqrt{26}  + 4}

Learn more about completing the square here:

brainly.com/question/10449635

#SPJ1

4 0
2 years ago
What is the square root of 30
sattari [20]
5.47 is the square root of 30.
3 0
4 years ago
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The second term of an arithmetic sequence is –5, and the third term is –20. What is the first term?
yaroslaw [1]

Answer:

a₁ = 10

Step-by-step explanation:

The common difference d is calculated as

d = a₃ - a₂ = - 20 - (- 5) = - 20 + 5 = - 15

Then

a₂ - a₁ = d , that is

- 5 - a₁ = - 15 ( add 5 to both sides )

- a₁ = - 10 ( multiply both sides by - 1 )

a₁ = 10

8 0
2 years ago
Help me please
torisob [31]

Answer:

26 ft

Step-by-step explanation:

7 0
4 years ago
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