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2 years ago

Write an algebraic expression that corresponds to "the opposite of a number "

Mathematics

1 answer:

Katarina [22]2 years ago

7 0

Answer:

-n

Step-by-step explanation:

If n represents "a number", then the opposite of the number is ...

-n

<em>Examples</em>:

The opposite of -3 is -(-3) = 3. The opposite of 10 is -10.

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An international company has 22,700 employees in one country. If this represents 23.1 of the company's employees,how many employ

GrogVix [38]

Answer: 98268

Step-by-step explanation:

Given: In an international company,

Employees in one country = 22,700

If this is 23.1% of the total number of company's employees,

[ $1\%=\dfrac1{100}$ , replace 'of' by '×']

i.e. 23.1% of (total employees) = 22700

$\Rightarrow\ \dfrac{23.1}{100}\times\text{(total employees)}=22700\\\\\Rightarrow\ \text{Total employees}=\dfrac{22700\times100}{23.1}\\\\\Rightarrow\ \text{Total employees}=98268.4\approx98268$

Hence, there are 98268 employees in total.

4 0

2 years ago

The area of a circular sun spot is growing at a rate of 1,200 km2/s.

Tpy6a [65]

A)

$\bf \textit{area of a circle}\\\\
A=\pi r^2
\\\\\\
\cfrac{dA}{dt}=\pi \cdot 2r\cfrac{dr}{dt}\implies \cfrac{dA}{dt}=2\pi r\cfrac{dr}{dt}\implies \cfrac{\frac{dA}{dt}}{2\pi r}=\cfrac{dr}{dt}\\\\
-----------------------------\\\\
\left. \cfrac{dr}{dt} \right|_{r=3000}\implies \cfrac{1200}{2\pi \cdot 3000}=\cfrac{dr}{dt}\\\\$

B)

$\bf A=\pi r^2\qquad A=490000\implies 490000=\pi r^2\implies \sqrt{\cfrac{490000}{\pi }}=r
\\\\\\
\left. \cfrac{dr}{dt} \right|_{r=\sqrt{\frac{490000}{\pi }}}\implies \cfrac{1200}{2\pi \cdot \sqrt{\frac{490000}{\pi }}}=\cfrac{dr}{dt}
$

8 0

3 years ago

During quarantine your goal was to do a total of 36 pull-ups and push ups in a minute. You end up doin 8 times as many push-ups

Semmy [17]

Answer:

36 times 8 = 288

5 0

3 years ago

Read 2 more answers

Solve the quadratic equation by factoring. <br> b^2+b-30=0

Fantom [35]

Answer:

(b-5)(b+6)=0

Step-by-step explanation:

i call it "reverse FOIL"

8 0

3 years ago

A bicycle store costs $2250 per month to operate. The store pays an average of $40 per bike. The average selling price of each

lesantik [10]

Answer:

Step-by-step explanation:

Given That :

Operation cost = $2250 per month

Purchase price per bike = $40

Average selling price per bike = $70

How many bicycles must the store sell each month to break even ;

Break even point = point at which there is net profit / loss = 0

Let number of bicycles store must sell = x

Operation cost + (purchase price * Number of bicycles) = selling price * Number of bicycles

2250 + 40x = 70x

2250 = 70x - 40x

2250 = 30x

x = 2250 / 30

x = 75

To break even 75 bicycles must be sold

5 0

3 years ago