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3 years ago

A number with a known value is called a ______

Mathematics

1 answer:

Anuta_ua [19.1K]3 years ago

5 0

Answer: they are called constants

Step-by-step explanation:

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A car can be rented for $50 per week plus $0.75 per milo. How many miles can be driven if you have at most $140 to spend for woo

avanturin [10]

Answer: 120 Miles

Step-by-step explanation:

We start with $140.

The initial payment is $50.

$140 - $50 = $90

We now have $90 dollars to spend on miles.

$90/$0.75 per mil = 120 Miles

Using the remaining $90 we can drive 120 miles in a week.

7 0

3 years ago

Iodine-125 has a half-life of about 60 days. How many milligrams of a 1000mg sample will remain after 240 days?

Bezzdna [24]

62.5 mg sample will remain after 240 days

Step-by-step explanation:

Given

Half-life = T = 60 days

The formula for calculating the quantity after n half lives is given by:

$N = N_0(\frac{1}{2})^n$

Here

N is the final amount

N_0 is the initial amount

n is the number of half lives passed

The number of half lives are calculated by dividing the time for which the remaining quantity has to be found by half life

The quantity has to be calculated for 240 days so,

$n = \frac{240}{60}\\n = 4$

Given

$N_0 = 1000\ mg$

Putting the values in the formula

$N = 1000 (\frac{1}{2})^4\\=1000 * \frac{1}{16}\\=\frac{1000}{16}\\=62.5\ mg$

Hence,

62.5 mg sample will remain after 240 days

Keywords: Half-life, sample

Learn more about half-life at:

#LearnwithBrainly

4 0

4 years ago

( 9 × 10*3)( 2 × 10*10)

Snezhnost [94]

9000+20000000000=?!!!!!

3 0

4 years ago

What is the solution to the inequality 3x - 12| ≥ 6?

natta225 [31]

<h3>Answer: x ≤ 2 or x ≥ 6</h3>

========================================

Work Shown:

|3x-12| ≥ 6

3x-12 ≥ 6 or 3x-12 ≤ -6 ..... see note below

3x ≥ 6+12 or 3x ≤ -6+12

3x ≥ 18 or 3x ≤ -6+12

3x ≥ 18 or 3x ≤ 6

x ≥ 18/3 or x ≤ 6/3

x ≥ 6 or x ≤ 2

x ≤ 2 or x ≥ 6

----

Note: if |A| ≥ B, then A ≥ B or A ≤ -B where B is some positive number.

Example: |x| ≥ 5 means either x ≥ 5 or x ≤ - 5

4 0

2 years ago

Plot the x- and y-intercepts to graph the equation

labwork [276]

Answer:

The answer is big so

Step-by-step explanation:

The answer is quite lengthy.

I'll explain through comments. Say hi through comment

8 0

3 years ago