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Thepotemich [5.8K]
3 years ago
6

Four student spent $12 on school lunchat this rate find amount 10 students would spend on the same school lunch

Mathematics
1 answer:
Nesterboy [21]3 years ago
7 0
$12 / 4= $3 per student
$3 x 10 = $30
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Which equals the product of (x-3)(2x + 1)? 222 – 7x - 3 22 – 5x - 3 3x = 2 6,2​
Katena32 [7]

Answer:

.

Step-by-step explanation:

2 {x}^{2}  - 5x - 3

4 0
2 years ago
The population of the world was 7.1 billion in 2013, and the observed relative growth rate was 1.1% per year. A) Estimate how lo
VLD [36.1K]

Answer:

A) 63.36 years.

B) 100.42 years.

Step-by-step explanation:

We have been given that the population of the world was 7.1 billion in 2013, and the observed relative growth rate was 1.1% per year.

A) Since we know that population increases exponentially, therefore we will use our given information to form an exponential model for population increase and then we will solve for the time by which our population will be double.

P(t)=7.1(1.011)^{t}            

7.1 \times 2=7.1(1.011)^{t}  

\frac{7.1 \times 2}{7.1} =(1.011)^{t}

2 =(1.011)^{t}

Now let us solve for t using logarithm.

ln(2) =ln (1.011)^{t}      

ln(2) =t \cdot ln(1.011)

0.6931471805599453 =t \cdot 0.0109399400383344  

t=\frac{0.6931471805599453}{0.0109399400383344}

t=63.3593217267282743049\approx 63.36

Therefore, it will take 63.36 years the population to be double.

B) Now we will find the number of years it will take the population to be triple of its size.

7.1 \times 3=7.1(1.011)^{t}

\frac{7.1 \times 3}{7.1} =(1.011)^{t}  

3 =(1.011)^{t}

Now let us solve for t using logarithm.        

ln(3) =ln (1.011)^{t}

ln(3) =t \cdot ln(1.011)

1.0986122886681097 =t \cdot 0.0109399400383344  

t=\frac{1.0986122886681097}{0.0109399400383344}

t=100.4221490079915311298\approx 100.42

Therefore, it will take 100.42 years the population to triple of its size.


6 0
2 years ago
The electric bill in May was $248.00. In June the bill was $265.00. What is the percent of increase rounded to the nearest hundr
natali 33 [55]
1) May: 248$ and june 265$. The difference is 17$ and then you divide the difference with the old price: 17/ 248 = 6,85% 
2) Same method, the difference is 59$ so 27,44%' 
3) The difference is 9,5$ so you answer is 63,3% 
<span>4) The difference is 10$ divided by the original price: 10/24 = 41,66%</span>
4 0
3 years ago
Read 2 more answers
A car is traveling at a constant speed of M miles per hour. Which coordinate is
lbvjy [14]

(1, M) this represents the miles per hour, which'll help find the other coordinates.

3 0
3 years ago
Read 2 more answers
Just need to know what x is haha
marishachu [46]

Answer: x=14

Step-by-step explanation:

The angles in a triangle are equal to 180 so

6x + 3 + 5x + x + 9 = 180

12x + 12 = 180

      -12     -12

12x = 168

x = 14

4 0
3 years ago
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