Julie's cell phone is 9 centimeters long. How many millimeters long is her cell phone?

Mathematics

2 answers:

DaniilM [7]3 years ago

3 0

Julie's cell phone is 90 millimeters long.

gtnhenbr [62]3 years ago

3 0

It is 90 millimeters. ^_^

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Mathematics can uh solve this please

guajiro [1.7K]

Answer:

$a^3 + 1 = 0$

Step-by-step explanation:

We start with the equation:

$a + \frac{1}{a} = 1$

We want to find the value of:

$a^3 + 1 =$

We can start with our previous equation and multiply both sides by a:

$(a + \frac{1}{a})*a = 1*a\\a^2 + 1 = a$

Now we can rewrite our initial expression as:

$a = 1 - \frac{1}{a}$

Replacing that in the right side, we get:

$a^2 + 1 = a = 1 - \frac{1}{a}$

Now again, let's multiply both sides by a

$a*(a^2 + 1) = a*(1 - \frac{1}{a} )\\a^3 + a = a - a/a\\a^3 + a = a - 1\\a^3 = -1\\a^3 + 1 = 0$

So we can conclude that:

$a^3 + 1 = 0$

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3 years ago

The ratio of the radii of two distinct spheres is 3:4. what is the ratio of their respective surface areas?

Naya [18.7K]

Hey , here is the answer to ur question.....!
Given: Radii is in the ratio 3:4
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Solution: Surface area of a sphere =4* pi *r^2
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3 years ago

Marge earned money for helping a local business. She spent 1/2 of the money on her phone, and the remaining 1/2 on a gift. She h

trasher [3.6K]

Answer:

Marge has earned $60.

Step-by-step explanation:

Let the total money she earned be x.

Money spent o the phone = $\frac{1}{2}x=0.5x$