$i=\sqrt{-1}\\\\\sqrt{-4}=\sqrt{(4)(-1)}=\sqrt4\cdot\sqrt{-1}=2i\\\\\sqrt{-25}=\sqrt{(25)(-1)}=\sqrt{25}\cdot\sqrt{-1}=5i\\\\\sqrt{-4}-\sqrt{-25}=2i-5i=-3i$

5 0

2 years ago

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What value of x is in the solution set of 4x – 12 < 16 + 8x? -10 -9 -8 -7

Akimi4 [234]

Answer:

Step-by-step explanation:

4x - 12 ≤ 16 + 8x

4x - 8x ≤ 16 + 12

- 4x ≤ 28

x ≥ - 7 or [ - 7, ∞ )

3 0

2 years ago

A girl weighs 5/8 as much as her brother does. If the girl weighs 110 lb, how much does her brother weigh?

mamaluj [8]

176 is the brothers weight.

5 0

3 years ago

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The equation x2 - 9 = 0 has real solution(s). DONE

Andru [333]

Answer:

{-3, 3}

Step-by-step explanation:

x^2 - 9 = 0 can be written in factored form as (x -3)(x + 3) = 0. Letting each factor equal zero separately and solving for x, we get x: {-3, 3}

5 0

2 years ago