Question

please help me asap 10 points.

Answer 1

Step-by-step explanation:

1).

$\frac{x}{8} = \frac{9}{24}$

Cross multiply

We have

24x = 72

Divide both sides by 24

That's

$\frac{24x}{24} = \frac{72}{24}$

We have the answer as

x = 3

2).

3x² + 2x - 10

when x = - 1

Substitute the value of x into the expression

That's

3(-1)² + 2(-1) - 10

= 3 - 2 - 10

We have the answer as

- 9

When x = 0

That's

3(0) + 2(0) - 10

= - 10

When x = 1

That's

3(1)² + 2(1) - 10

= 3 + 2 - 10

= 5 - 10

= - 5

3).

$\sqrt{( - 9)}$

First of all apply the radical rule

That's

$\sqrt{ - a} = \sqrt{ - 1} \times \sqrt{a}$

So we have

$\sqrt{ - 9} = \sqrt{ - 1} \times \sqrt{9}$

Using the imaginary rule

That's

$\sqrt{ - 1} = i$

We have

$\sqrt{9} \times i$

We have the final answer as

3i

4).

$\frac{1}{x}$

when x = 0

We have

$\frac{1}{0} = 0$

when x = 1

$\frac{1}{1} = 1$

when x = 2

We have

$\frac{1}{2}$

Hope this helps you