I don’t know how to solve the equation

Mathematics

1 answer:

Artemon [7]3 years ago

8 0

To solve this equation we have to factor.
We are looking for 2 numbers with a sum of -3, and multiplied they have to be -28. These numbers are -7 and 4.

So:
${x}^{2} - 3x - 28 = 0$
$(x - 7)(x + 4) = 0$
$x - 7 = 0 \: \: \: \: x + 4 = 0$
$x = 7 \: \: \: \: x = - 4$

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babymother [125]

Answer:

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Step-by-step explanation:

a = 8m

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c = ?

According to the Pythagoras theorem,

a² + b² = c²

8² + 5² = c²

64 + 25 = c²

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Rounding off,

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3 years ago

5.Solve the system using substitution.

Nikolay [14]

OK first convert one of the equations into Y=MX+b form

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So it would be

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Now solve for y

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Add 6

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Now substitute this into one of the equations

Y - 2X = 3

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3 years ago

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Darina [25.2K]

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3 years ago

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ladessa [460]

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