3 years ago

Ok can someone please help me? 15 pts

Mathematics

1 answer:

Citrus2011 [14]3 years ago

7 0

Answer:

3.2

Step-by-step explanation:

12.8/4 which makes the answer 3.2

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X^2-5x-24=0 3x^2+x-4=0 Solve by factoring or using the quadratic formula

grin007 [14]

$x^2-5x-24=0\\\\-5x=3x-8x\\-24=3\cdot(-8)\\\\x^2-5x-24=0\\\\\Downarrow\\\\(x+3)(x-8)=0\iff x+3=0\ \vee\ x-8=0\\\\x=-3\ \vee\ x=8$

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$3x^2+x-4=0\\\\a=3;\ b=1;\ c=-4\\\\\Delta=b^2-4ac\to\Delta=1^2-4\cdot3\cdot(-4)=1+48=49\\\\x_1=\frac{-b-\sqrt\Delta}{2a}\to x_1=\frac{-1-\sqrt{49}}{2\cdot3}=\frac{-1-7}{6}=\frac{-8}{6}=-\frac{4}{3}\\\\x_2=\frac{-b+\sqrt\Delta}{2a}\to x_2=\frac{-1+\sqrt{49}}{2\cdot3}=\frac{-1+7}{6}=\frac{6}{6}=1$

6 0

3 years ago

Read 2 more answers

The average of 2 3 and what number is 10? pls help

Advocard [28]

I think it’s 5 tbh it’s random

7 0

3 years ago

What does z equal 1 - z/5 = 9

bixtya [17]

The answer to this question is Z = -40

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3 years ago

PLEASE PLEASE HELP!!

Black_prince [1.1K]

Answer:

It is right

Step-by-step explanation:

square all sides

we have 16, 32, 48

add the two shortest sides, which equal the third side

the triangle works with the pythagorean theorem, so of course it is right :)

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2 years ago

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Nesterboy [21]

Answer:

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Step-by-step explanation:

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