Ask question

Ask question

All categories

3241004551 [841]

3 years ago

6

How many five digit ZIP Codes are possible if the two numbers cannot be zero or a one? (Numbers can repeat)

1 answer:

olga nikolaevna [1]3 years ago

5 0

Answer:

This means 100000 possible zip codes if repeatable

Step-by-step explanation:

You might be interested in

Pattern in 6, 7, 13, 20, ?

Len [333]

This is a Fibonacci sequence:

6, 7, 13, 20, 33, 53, 86, 139, 225, ...

3 0

3 years ago

Answers now please!

gulaghasi [49]

Hhzbxbxnnsjshsjjsjsjs

4 0

4 years ago

Solve the following equation by factoring:9x^2-3x-2=0

olya-2409 [2.1K]

Answer:

The two roots of the quadratic equation are

$x_1= - \frac{1}{3} \text{ and } x_2= \frac{2}{3}$

Step-by-step explanation:

Original quadratic equation is $9x^{2}-3x-2=0$

Divide both sides by 9:

$x^{2} - \frac{x}{3} - \frac{2}{9}=0$

Add $\frac{2}{9}$ to both sides to get rid of the constant on the LHS

$x^{2} - \frac{x}{3} - \frac{2}{9}+\frac{2}{9}=\frac{2}{9}$ ==> $x^{2} - \frac{x}{3}=\frac{2}{9}$

Add $\frac{1}{36}$ to both sides

$x^{2} - \frac{x}{3}+\frac{1}{36}=\frac{2}{9} +\frac{1}{36}$

This simplifies to

$x^{2} - \frac{x}{3}+\frac{1}{36}=\frac{1}{4}$

Noting that (a + b)² = a² + 2ab + b²

If we set a = x and b = $\frac{1}{6}\right)$ we can see that

$\left(x - \frac{1}{6}\right)^2$ = $x^2 - 2.x. (-\frac{1}{6}) + \frac{1}{36} = x^{2} - \frac{x}{3}+\frac{1}{36}$

So

$\left(x - \frac{1}{6}\right)^2=\frac{1}{4}$

Taking square roots on both sides

$\left(x - \frac{1}{6}\right)^2= \pm\frac{1}{4}$

So the two roots or solutions of the equation are

$x - \frac{1}{6}=-\sqrt{\frac{1}{4}}$ and $x - \frac{1}{6}=\sqrt{\frac{1}{4}}$

$\sqrt{\frac{1}{4}} = \frac{1}{2}$

So the two roots are

$x_1=\frac{1}{6} - \frac{1}{2} = -\frac{1}{3}$

and

$x_2=\frac{1}{6} + \frac{1}{2} = \frac{2}{3}$

7 0

2 years ago

Andrew walks 3/4 mile in 10 minutes. Jill walked 4/5 in 15 minutes. What was the difference in their speeds, in miles per hour?

Romashka [77]

Answer:

1.3 mph I think

Step-by-step explanation:

8 0

3 years ago

Factor -8x3-2x2-12x-3by group

horrorfan [7]

<span>- 8x</span>³ <span>- 2x</span>² <span>- 12x - 3 = 2x</span>²(-4x-1) + 3(-4x-1) = (-4x - 1)(2x² + 3)

4 0

3 years ago