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3 years ago

What is the value of a 3 - b 2 for a = 3 and b = ?

Mathematics

1 answer:

stellarik [79]3 years ago

7 0

Answer:

a^3 - b^2 for a = 3 and b = 1/2

3^3 - (1/2)^2

= 27 - 1/4

= 26 3/4

Step-by-step explanation:

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solve the system of equations and choose the correct answer from the list of options. 2x y = -4 y = 3x 2(-6/5 , -8/5)(-8/5 , -6/

natita [175]

If you would like to solve the system of equations 2x + y = -4 and y = 3x + 2, you can do this using the following steps:

2x + y = -4
y = 3x + 2
_________
2x + y = -4
2x + 3x + 2 = -4
5x = -4 - 2
5x = -6
x = -6/5

y = 3x + 2 = 3 * (-6/5) + 2 = -18/5 + 10/5 = -8/5

(x, y) = (-6/5, -8/5)

The correct result would be (-6/5, -8/5).

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3 years ago

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ipn [44]

Answer:

- 14, - 7 or 7, 14

Step-by-step explanation:

Let the the two integers be x and (x + 7)

$\therefore \: x(x + 7) = 98 \\ {x}^{2} + 7x - 98 = 0 \\ {x}^{2} + 14x - 7x - 98 = 0 \\ x(x + 14) - 7(x + 14) = 0 \\ (x + 14)(x - 7) = 0 \\ (x + 14) = 0 \: or \: (x - 7) = 0 \\ x = - 14 \: or \: x = 7 \\ \\ when \: x = - 14 \\ x + 7 = - 14 + 7 = - 7 \\ \\ when \: x = 7 \\ x + 7 = 7 + 7 = 14 \\$

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Step-by-step explanation:

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