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2 years ago

Solve by factorisation 2x2 + 3x - 20 = 0

Mathematics

1 answer:

Thepotemich [5.8K]2 years ago

7 0

(2x - 5) (x + 4).................

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What is 3x-10 less than 2

OleMash [197]

3x - 10 < 2

3x < 2 + 10

3x < 12 Divide through by 3.

x < 12/3

x < 4

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2 years ago

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Solve for x in this equation.

arsen [322]

Answer:

Step-by-step explanation:

1. (x-10)+67=90 because it's a 90 degree angle

2.subtract 67: x-10=23

3. add 10: x=33

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2 years ago

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Help!!!!!!!!!!!!!!!!!!!!!!!

Nataly [62]

Hello.

Firstly, let's isolate x on the equation:

$\mathsf{f(x) = 3x + 3} \\ \\ \mathsf{y = 3x + 3} \\ \\ \mathsf{-3x = -y + 3} \\ \\ \mathsf{x = \dfrac{-y + 3}{3}}$

Now, we can replace 'x' for 'y' and vice-versa:

$\mathsf{f^{-1}(x) = \frac{-x + 3}{3}`}$

Hope I helped.

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2 years ago

Thrice the sum of three fifths and two thirds less one half is what number?

Oduvanchick [21]

Answer:

Step-by-step explanation:

Thrice the sum of three fifths and two thirds less one half is expressed as 3(3/5 + 2/3)-1/2

Open the parenthesis

3(3/5) + 3(2/3) - 1/2

= 9/5 + 6/3 - 1/2

Find LCM

= 9(6)+10(6)-15/30

= 54+60-15/30

= 54+45/30

= 99/30

= 3 9/30

= 3 3/10

Hence the number id 3 3/10

4 0

3 years ago

<img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20-10x%2B5-3%28x-5%29" id="TexFormula1" title="x^{2} -10x+5-3(x-5)" alt="x^{2} -10

stellarik [79]

Answer:

−

8 0

2 years ago