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ira [324]
2 years ago
11

The value of k, if x = 1, y = 2 is a solution of the equation 2x + 3y = k

Mathematics
2 answers:
mart [117]2 years ago
6 0

Step-by-step explanation:

Putting values of x and y

2(1) + 3(2)

2 + 6

= 8

k = 8

antiseptic1488 [7]2 years ago
4 0

Answer:

so the value of k is 8

Step-by-step explanation:

2x+3y=k

put x=1 and y=2

2(1)+3(2)=k

2+6=k

k=8

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What are the solutions of the equation x^4 + 6x^2 + 5 = 0? Use u substitution to solve.
Radda [10]

Answer:

second option

Step-by-step explanation:

Given

x^{4} + 6x² + 5 = 0

let u = x², then

u² + 6u + 5 = 0 ← in standard form

(u + 1)(u + 5) = 0 ← in factored form

Equate each factor to zero and solve for u

u + 1 = 0 ⇒ u = - 1

u + 5 = 0 ⇒ u = - 5

Change u back into terms of x, that is

x² = - 1 ( take the square root of both sides )

x = ± \sqrt{-1} = ± i ( noting that \sqrt{-1} = i ), and

x² = - 5 ( take the square root of both sides )

x = ± \sqrt{-5} = ± \sqrt{5(-1)} = ± \sqrt{5} × \sqrt{-1} = ± i\sqrt{5}

Solutions are x = ± i and x = ± i\sqrt{5}

3 0
2 years ago
Factor X^3-7x^2-5x+35
Vinil7 [7]
The answer would be
- (34x^3 - 35)
3 0
3 years ago
Read 2 more answers
Given: m∠1 = 140°, find m∠6.
zavuch27 [327]
<h2><em><u>Ans</u></em><em><u>wer</u></em><em><u>:</u></em></h2>

Let m<6 be X

140° + X = 180°

X = 180° - 140°

X =40°

5 0
3 years ago
Help!!
klio [65]

Answer:

The answer is 14.

Step-by-step explanation:

Since all of the angles of a triangle add up to be 180, then all you have to do is add the 2 angles together that you have and subtract that number from 180. For example 141+25=166, so, 180-166=14. 14 would be the measure of the third angle.

5 0
3 years ago
Do any of you guys know this please i need helppp!!
Fudgin [204]
The third one
5/6 is the answer
7 0
2 years ago
Read 2 more answers
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