A biologist studied the populations of common guppies and Endler's guppies over a 6-year period. the biologist modeled the populations, in tens of thousands, with the following polynomials where x is time, in years.

common guppies: 3.1x^2+6x+0.3

Endler's guppies: 4.2x^2-5.2x+1

what polynomial models the total number of common and Endler's guppies

Answers

Answer 1
We can say that total number of guppies would simply be the sum of two polynomials.
To get our answers we need to add those two polynomials. We add polynomials by adding their like terms. Like terms are those that have the same exponent.
[tex]3.1x^2+6x+0.3+4.2x^2-5.2x+1=\\=(3.1x^2+4.2x^2)+(6x-5.2x)+(0.3+1)=\\ =7.3x^2+0.8x+1.3[/tex]
So the total amount of guppies would be modeled using this polynomial:
[tex]7.3x^2+0.8x+1.3[/tex]
Answer 2

what polynomial models the total number of common and Endler's guppies

your answer will be:

7.3x^2+0.8+1.3

Step-by-step explanation:

this answer correct for 2022


Related Questions

Write a while loop that adjusts uservalue while uservalue is less than 0 or greater than 80. if uservalue is greater than 80, then subtract 5 from uservalue. if uservalue is less than 0, then add 10 to uservalue.

Answers

Final answer:

A 'while loop' can be programmed with conditions to adjust a 'user value'. If 'user value' is greater than 80, 5 would be subtracted from it. If it is less than 0, 10 would be added to it. This loop continues until 'user value' does not meet either condition.

Explanation:

The question asks for a while loop in programming that modifies a value (user value) based on these conditions: if the user value is less than 0, it should be increased by 10 and if it's greater than 80, it should be decreased by 5. Here's a representative code for that:

while(user value < 0 || user value > 80) {

if(user value > 80) {user value -= 5; } else if(user value < 0) {user valuable += 10;}

This loop will continue to execute until the user value is not less than 0 or greater than 80.

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Make a comparison between the government’s roles in a capitalist economic system versus a socialist or communist economic system.

Answers

Hello!

In a Capitalist Economic System, the government is expected to guarantee the respect to private property, promulgate laws that defend economic freedom, and is an intermediary between the private sector and society. In this economic system, the government is reduced an doesn't intervene in the free market. 

In a Socialist or Communist Economic System, the government redistributes goods and services, takes the means of production (private property) from their owners to put them in service of the working class, promulgate laws that limit economic freedom and heavily intervenes in the market and economy.

Have a nice day! 

A capitalist economic system is built on the respect of private property and competition. Hard work and free enterprise benefit citizens more than the government can. For the most part, government intervention is reduced. However, the government does provide security and some basic services, like infrastructure, to its citizens.

Socialist and communist systems endure more government control. Citizens of these economies have a limited amount of freedom by law. The government controls the market place and the production of most goods and services.

^ My answer from Edge

Use euler's theorem to find a number x between 0 and 28 with x85 congruent to 6 modulo 35.

Answers

Problem: find 0 &le; x &le; 28 such that x^85 ≡ 6 modulo 35.

By Fermat-Euler theorem:
If a and n are coprime, i.e. (a,n)=1, then
a^phi(n) ≡ 1 mod n  
where phi(n)=totient function, the number of positive integers less than n that is coprime with n.

for n=35, phi(35)=24 calculated as follows:
There are 10 positive integers from 1 to 34 which are NOT coprime with 35, namely {5,7,10,14,15,20,21,25,28,30}.Therefore phi(35)=34-10=24

From Fermat-Euler theorem, 
x^(phi(35) = x^24 ≡ 1 modulo 35  since (24,35)=1, i.e. 24 and 35 are coprime.
=>
x^12 ≡ &pm; 1 modulo 35. ...........(1)

and 

x^85 ≡ x^(85-3*24) ≡ x^(85-72) ≡ x^(13) ≡ 6 mod 35 ............(2)

Substituting (1) in (2)
x^(12)*x ≡ 6 mod 35
=>
(+1)*x = 6 mod 35   or  (-1)*x ≡ 6 mod 35
x ≡ 6 mod 35           x ≡ -6 mod 35   (rejected)

=>  x=6 

So

6^85 ≡ 6 mod 35


If any clarifications are needed or if you find any errors, please post.
Final answer:

To find a number x between 0 and 28 with x ≡ 6 (mod 35) using Euler's theorem, we can use Euler's totient function to find the power x^24 that is congruent to 1 (mod 35). The value x = 1 satisfies the congruence, so it is a possible solution.

Explanation:

To use Euler's theorem to find a number x between 0 and 28 with x ≡ 6 (mod 35), we need to find the value of x that satisfies the congruence. Euler's theorem states that if a and n are coprime positive integers, then a^φ(n) ≡ 1 (mod n), where φ(n) is the Euler's totient function of n. In this case, we need to find x such that x^φ(35) ≡ 1 (mod 35). The Euler's totient function of 35 is φ(35) = φ(5) * φ(7) = 4 * 6 = 24. Therefore, we need to find x such that x^24 ≡ 1 (mod 35).

We can start by examining the powers of x modulo 35:
x  ≡ x (mod 35)
x2  ≡ x² (mod 35)
x³  ≡ x³ (mod 35)
...
x^24 ≡ 1 (mod 35)

From this, we can see that x = 1 satisfies the congruence x^24 ≡ 1 (mod 35).

Therefore, a possible value of x between 0 and 28 that satisfies x ≡ 6 (mod 35) is x = 1.

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How many possible outcomes exist when Louisa spins the spinner below twice? The spinner is numbered from 1-8.

Answers

There are 8 outcomes for each spin.
So for two spins there are 8*8=64 possible outcomes, order counts, i.e. 5-3 is different from 3-5.

Answer:

The total number of possible outcomes are:

64

Step-by-step explanation:

It is given that:

Louisa spins the spinner below twice.

The spinner is numbered from 1-8.

Now, on spinning the spinner twice we obtain the sample space as:

(1,1)   (1,2)....................(1,8)

(2,1)  (2,2)...................(2,8)

(3,1)   (3,2)..................(3,8)

(4,1)   (4,2)..................(4,8)

(5,1)   (5,2)..................(5,8)

(6,1)   (6,2)..................(6,8)

(7,1)   (7,2)..................(7,8)

(8,1)   (8,2)..................(8,8)

Hence, the total number of outcomes is equal to the number of elements in sample space.

Hence, the total number of possible outcomes are:

64

the number of sentence is an example of which multiplication property

Answers

The Associative property.

4j-2/2=4j+5

4j minus 2 divided by 2 equals 4j plus 5 ?

Answers

if your question is:
[tex] \frac{4j - 2}{2} = 4j + 5[/tex]
then this is the answer:
[tex] \frac{4j - 2}{2} \times 2 = 2 \times (4j + 5)[/tex]
[tex]4j - 2 = 8j + 10[/tex]
4j - 2 - 4j = 8j + 10 - 4j
-2 = 4j + 10
-2 - 10 = 4j + 10 - 10
-12 = 4j
[tex] \frac{ - 12}{4} = \frac{4j}{4} [/tex]
-3 = j
j = -3

The solution to the equation (4j - 2) / 2 = 4j + 5 is j = -3. The equation was simplified by eliminating fractions and isolating the variable j through algebraic steps.

To solve the equation (4j - 2) / 2 = 4j + 5 for the variable j, you can follow these steps:

1. First, simplify both sides of the equation:  

  (4j - 2) / 2 = 4j + 5

2. Multiply both sides of the equation by 2 to eliminate the fraction:

  4j - 2 = 2 * (4j + 5)

3. Distribute the 2 on the right side:

  4j - 2 = 8j + 10

4. Move the variable terms to one side of the equation and the constants to the other side. You can do this by subtracting 8j from both sides:

  4j - 8j - 2 = 10

5. Combine like terms:

  -4j - 2 = 10

6. Add 2 to both sides to isolate the variable term:

  -4j = 10 + 2

  -4j = 12

7. Finally, divide both sides by -4 to solve for j:

  j = 12 / -4

  j = -3

So, the solution to the equation is j = -3.

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find d for the arithmetic series with S17=-170 and a1=2

Answers

so, we know the sum of the first 17 terms is -170, thus S₁₇ = -170, and we also know the first term is 2, well

[tex]\bf \textit{ sum of a finite arithmetic sequence}\\\\ S_n=\cfrac{n(a_1+a_n)}{2}\qquad \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ ----------\\ n=17\\ S_{17}=-170\\ a_1=2 \end{cases} \\\\\\ -170=\cfrac{17(2+a_{17})}{2}\implies \cfrac{-170}{17}=\cfrac{(2+a_{17})}{2} \\\\\\ -10=\cfrac{(2+a_{17})}{2}\implies -20=2+a_{17}\implies -22=a_{17}[/tex]

well, since the 17th term is that much, let's check what "d" is then anyway,

[tex]\bf n^{th}\textit{ term of an arithmetic sequence}\\\\ a_n=a_1+(n-1)d\qquad \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ d=\textit{common difference}\\ ----------\\ n=17\\ a_{17}=-22\\ a_1=2 \end{cases} \\\\\\ -22=2+(17-1)d\implies -22=2+16d\implies -24=16d \\\\\\ \cfrac{-24}{16}=d\implies -\cfrac{3}{2}=d[/tex]

Ava bought a rectangular rug for her hallway. The rug is 23 yards wide and 234 yards long. What is the area of the rug as a mixed number in simplest form?

Answers

Area= L*W=234*23=5,382 square yards
5,382 is in the simplest form

this is not a fraction, so i don't see where the simplest form comes in

The area of Ava's rectangular rug is 5382 square yards, calculated by multiplying the width (23 yards) and the length (234 yards).

To find the area of Ava's rectangular rug, we need to multiply its length and width:

Area = length × width

Using the given dimensions: 23 yards wide and 234 yards long:

Area = 23 × 234

First, let's perform the multiplication:

23 × 234 = 5382 square yards

Thus, the area of the rug is 5382 square yards as an improper fraction, which cannot be simplified further as a mixed number. Since the measurements are whole numbers, converting to a mixed number doesn't apply in this case.

Find f '(0.3) for f of x equals the integral from 0 to x of the arccosine of t, dt

Answers

By the fundamental theorem of calculus,

[tex]\displaystyle\frac{\mathrm d}{\mathrm dx}\int_0^x\cos^{-1}t\,\mathrm dt=\cos^{-1}x[/tex]

so that

[tex]f'(0.3)=\cos^{-1}0.3\approx1.266[/tex]

Matt Miller, age 28, takes out $50,000 of straight-life insurance. His annual premium is $418.20. Using
the tables in the Business Math Handbook that accompanies the course textbook, determine the cash value
of his policy at the end of 20 years.
A. $13,250
B. $26,000
C. $30,000
D. $26,500

Answers

Look at the table that mentions "cash value". Locate "20" in the first column (the "years" column). Right next to 20 is the value 265. That's the multiplier we will use. 

50,000/1,000 = 50 will be multiplied with 265 to get 265*50 = 13,250

So the cash value of this policy is $13,250

Suppose p(x1) = .75 and p(y2 | x1) = .40. what is the joint probability of x1 and y2?

Answers

By definition of conditional probability,

[tex]\mathbb P(Y_2\mid X_1)=\dfrac{\mathbb P(Y_2\cap X_1)}{\mathbb P(X_1)}[/tex]

so

[tex]\mathbb P(Y_2\cap X_1)=0.40\times0.75=0.3[/tex]

The joint probability of x1 and y2 is  P (Y₂/X₁ ) = P(Y₂ ∩ X₁ )/ P (X₁) will be 0.3.

What is the probability about?

In the joint probability of x1 and y2 is  P (Y₂/X₁ )= P(Y₂ ∩ X₁ )/ P (X₁).

Therefore:

P(Y₂ ∩ X₁ )

=0.40 x 0.75

= 0.3

Therefore by following the law of conditional probability, the outcome of the The joint probability of x1 and y2 is  P (Y₂/X₁ ) = P(Y₂ ∩ X₁ )/ P (X₁) will be 0.3.

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Fiona is serving iced tea and lemonade at a picnic. She has only 44 cups in which to serve the drinks. If x represents the number of glasses of iced tea and y represents the number of glasses of lemonade, which equation represents the number of glasses of iced tea she can serve?

Answers

x = 44 - y

will compute the number of glasses of tea Fiona can serve based on the number of cups used for lemonade.

Answer:

[tex]x=44-y[/tex]

Step-by-step explanation:

Let x represents the number of glasses of iced tea .

Let y represents the number of glasses of lemonade.

Now we are given that She has only 44 cups in which to serve the drinks

Since y is the number of glasses of  lemonade out of 44 glasses

So, remaining glasses = [tex]44-y[/tex]

So, remaining glasses is for iced tea .

So, No. of iced tea glasses =  [tex]x=44-y[/tex]

Hence She can serve [tex]x=44-y[/tex] number of glasses of iced tea serve.

Given: KLMN is a parallelogram, KA − angle bisector of ∠K LA − angle bisector of ∠L Prove: m∠KAL = 90°

Answers

Final answer:

This answer explains how to prove that angle KAL is 90 degrees in a parallelogram using angle bisectors.

Explanation:

To prove: m∠KAL = 90°

Given: KLMN is a parallelogram, KA - angle bisector of ∠K, LA - angle bisector of ∠L.

Proof:

Since KA and LA are angle bisectors in parallelogram KLMN, m∠K = m∠L.In a parallelogram, consecutive angles are supplementary, so m∠K + m∠L = 180°.Substitute m∠K for m∠L in the above equation: m∠K + m∠K = 180°, which simplifies to 2m∠K = 180°, giving m∠K = 90°.

Proved that the measure of angle KAL is 90 degrees, which means that angle KAL is a right angle.

To prove that [tex]\( m\angle KAL = 90^\circ \)[/tex], we need to use the properties of angle bisectors and parallelograms.

Step 1: Identify the properties of a parallelogram.

In a parallelogram, opposite sides are equal in length, and opposite angles are equal. Also, adjacent angles are supplementary, meaning they add up to 180 degrees.

Step 2: Apply the properties to parallelogram KLMN.

Since KLMN is a parallelogram, we have:

[tex]\[ m\angle K + m\angle L = 180^\circ \][/tex]

[tex]\[ m\angle K = m\angle M \][/tex]

[tex]\[ m\angle L = m\angle N \][/tex]

Step 3: Use the properties of angle bisectors.

An angle bisector divides an angle into two equal parts. Therefore, we have:

[tex]\[ m\angle KAK = m\angle KAA \][/tex]

[tex]\[ m\angle LAL = m\angle LAA \][/tex]

Step 4: Express the angles in terms of the bisected angles.

Since KA is the angle bisector of [tex]\( \angle K \)[/tex], we can express [tex]\( m\angle KAK \)[/tex]and [tex]\( m\angle KAA \)[/tex] as half of [tex]\( m\angle K \)[/tex]:

[tex]\[ m\angle KAK = m\angle KAA = \frac{1}{2}m\angle K \][/tex]

Similarly, since LA is the angle bisector of [tex]\( \angle L \)[/tex], we can express [tex]\( m\angle LAL \)[/tex] and [tex]\( m\angle LAA \)[/tex] as half of [tex]\( m\angle L \)[/tex]:

[tex]\[ m\angle LAL = m\angle LAA = \frac{1}{2}m\angle L \][/tex]

Step 5: Use the supplementary angle relationship.

Since [tex]\( \angle K \)[/tex] and [tex]\( \angle L \)[/tex] are supplementary, we have:

[tex]\[ m\angle K + m\angle L = 180^\circ \][/tex]

Dividing both sides by 2, we get:

[tex]\[ \frac{1}{2}m\angle K + \frac{1}{2}m\angle L = 90^\circ \][/tex]

Step 6: Substitute the expressions for the bisected angles.

[tex]\[ m\angle KAK + m\angle LAL = 90^\circ \][/tex]

[tex]\[ \frac{1}{2}m\angle K + \frac{1}{2}m\angle L = 90^\circ \][/tex]

Step 7: Recognize that [tex]\( m\angle KAL \)[/tex] is the sum of [tex]\( m\angle KAK \)[/tex]and[tex]\( m\angle LAL \)[/tex].

[tex]\[ m\angle KAL = m\angle KAK + m\angle LAL \][/tex]

Step 8: Substitute the values from Step 6 into the equation from Step 7.

[tex]\[ m\angle KAL = \frac{1}{2}m\angle K + \frac{1}{2}m\angle L \][/tex]

[tex]\[ m\angle KAL = 90^\circ \][/tex]

The mean of people in the sample of households of 7th-grade students is 4.3. The mean of people in the sample of households for 8th-grade students is 4.5. What might Principal Coleman infer or predict about the entire population based on the data?

Answers

Arithmetic mean is used to describe the sum of values in a dataset divided by the number of values. It s the average of a given dataset which gives us an idea about the average value in a data set. That said, a mean of 4.3 means in the household sample (the average number of students in the data set falls within probably 4 and 4.7 probably). On the other hand,.a mean of 4.5 means there are more 8th graders than 7th graders. An increase of 0.2 from the 4.3 shows that the number of 8th graders slightly surpasses 7th graders. The principal can predict that there are more students in 8th grade because they have a higher average.

Answer:

The mean of something is the "average"

For example, if the mean of people in the households of 7th-grade students is 4.3, this means that if you go to a random house of a 7th-grade student, you can expect around 4 people in there.

Now, for the  7th-grade students, the mean is 4.5, just a 0.2 bigger. (This means that, on average, there is more people in the 8th-grade student's households)

So Principal Coleman can infer that the amount of people in the households of  7th-grade students and 8th-grade students is almost the same, wherein the 8th-grade students there is a small chance of finding more people, but this difference is almost depreciable.

for this job , Hayden earns an hourly rate of $30. For each hour he works over 40 hours, he earns 1.5 times his regular hourly rate. In a two-week period, Hayden earns $2175 by working 40 regular hours, plus overtime. How many overtime hours did Hayden work?

Answers

Hayden's hourly rate is $30
Extra hour rate is 1.5×30=$45
given that he earned $2175 by working 40 regular hours, the number of overtime hours he worked will be given as follows;
let the number of overtime be x
hence total amount earned will be:
(40×30)+(45×x)=2175
1200+45x=2175
45x=2175-1200
45x=975
solving for x we get
x=975/45
x=65/3=21 2/3 hours



Which describes the slope of this line?



Number graph ranging from negative five to five on the x and y axes. A line is drawn on the graph that passes through (zero, negative three) and (two, one).



negative slope

positive slope

undefined slope

zero slope

Answers

I take the points that you gave. Let named A(0,-3) and B(2,1)

The slope coefficient is  S= (yb-ya)/(xb-xa)

S= (1-(-3))/(2-0) => S= (1+3)/2 = 4/2= +2 => S= +2

The correct answer is     positive slope
Good luck!!!

a square has 4 right angle corners. give another shape with 4 right angle corners

Answers

Another shape could be a rectangle. 

what is the gcf of the numerator and denominator of the rational expression
3x-15/x^2-x-20


A: x-5
B: x+4
C: 4
D: 5

Answers

[tex] \frac{3x-15}{x^2-x-20} = \frac{3(x-5)}{(x+4)(x-5)}[/tex]

The only common factor is (x -5).

Selection A is appropriate.

Identify the pair of alternate interior angles.

Question options:



A.) 2 and 8



B.) 1 and 8



C.)2 and 7



D.) 4 and 6

Answers

the answer is d) 4 and 6

share 747 pound in the ratio 2:7 betwen tom and ben

Answers

2p + 7p = 747
9p = 747 divded by 9 = 83
2 * 83 = 166    7 * 83 = 581

Hope it helps

A stop sign is a regular octagon. Each side of the sign is 12.6 in. long. The area of the stop sign is 770 in.^2. What is the length of the apothem to the nearest whole number?

Answers

150^2 in
hope this help

Final answer:

To determine the length of the apothem of a regular octagonal stop sign given its side length and area, use the formula for the area of a regular polygon, solve for the apothem, and then calculate it to be approximately 15 inches when rounded to the nearest whole number.

Explanation:

The student is asking how to find the length of the apothem of a regular octagonal stop sign with side lengths of 12.6 inches and a total area of 770 square inches. The apothem of a regular polygon is a line from the center to the midpoint of one of its sides and is also the radius of the inscribed circle within the polygon.

To find the apothem's length, we can use the formula for the area of a regular polygon: Area = (1/2) × Perimeter × Apothem. The perimeter (P) of the octagon is the length of one side multiplied by 8 (since an octagon has eight sides). Therefore, the perimeter is 12.6 in × 8 = 100.8 in.

We can rearrange the area formula to solve for the apothem (a): Area = (1/2) × P × a becomes a = Area × 2 / P. Substituting the known values, we get: a = 770 in² × 2 / 100.8 in, which calculates to an apothem length of approximately 15.24 inches. Round this to the nearest whole number to get an apothem length of 15 inches.

What fraction is equivalent to the fraction 0/6

Answers

0/2.

Since this is equal to zero, the answer could actually be any number in the demoninator and zero in the numerator.

Hope this helps!

Deposit $400 into an account that pays simple interest at rate of 4% per year how much interest will she be paid in the first 6 years

Answers

Deposit = $400
Simple interest = 4% 

Simple interest for one year = 4% of $400 = 0.04 x 400 = $16
Simple interest for 6 years = 16 x 6 = $96

Total interest for 6 years is $96

What are the solutions of the system? Solve by graphing. y=x2-2x-1 y = -2

Answers

To solve this problem you must:

 1. Rewrite the equations:

 y=x²-2x-1  (i)
 
 y=-2  (ii)

 2. Then: 

 (i)=(ii)

 -2=x²-2x-1

 3. Now, you must order the terms and and factorize, as below:

 (x-1)(x-1)=0
 (x-1)²=0

 4. The solution is:

 x=1

 You can see that the graphs attached touch each other in x=1. Therefore, the solution is x=1
 
 

A certain lottery has 3434 numbers. in how many different ways can 44 of the numbers beâ selected? (assume that order of selection is notâ important.)

Answers

the correct question is
A certain lottery has 34 numbers. in how many different ways can 4 of the numbers be selected? (assume that order of selection is not important.)

we know that
C=n!/[(n-r)!*r!]
n=34
r=4
then
C=34!/[(34-4)!*4!]=34*33*32*31/[4*3*2*1]=46376 

the answer is 46376

Solve for X.
x - 7.9 = 2.23

Answers

x=10.13 is the correct answer I think
Isolate the x

add 7.9 to both sides

x - 7.9 (+7.9) = 2.23 (+7.9)

x = 2.23 + 7.9

x = 10.13

hope this helps

Action wheels manufacturers models of antique cars for collectors. In August , it manufactured 300 model cars. In September, action wheels manufactured 5% fewer model cars than in August . What is the difference in the numbers of cars manufactured in August and September?

Answers

Hello! 300 cars were manufactured in August, and 5% fewer cars were made in September, compared to August. 5% fewer only means 5% less of the number 300, which means that in September, it made 95% of the amount of cars made in August. For this, what we do is multiply 300 by 95%. 300 * 95% (0.95) is 285. Now, what we do is subtract both numbers from each other to find the difference. 300 - 285 is 15. There. The difference of the amount of cars made in the two months is 15.

The difference in the number of cars manufactured in August and September is 15 cars.

The difference in the number of cars manufactured in August and September can be calculated as follows:

In August, Action Wheels manufactured 300 model cars.In September, they manufactured 5% fewer cars than in August, which means they made 95% of the cars they made in August.Calculating the number of cars manufactured in September: 300 * 0.95 = 285 cars.Therefore, the difference in the numbers of cars manufactured in August and September is 300 - 285 = 15 cars.

In a circle with a radius of 26.9 m, an arc is intercepted by a central angle of 9π5 radians.

What is the arc length?

Use 3.14 for π and round your final answer to the nearest hundredth.

Make sure to show your calculations.

Answers

Step 1
find the length of a circumference 
L=2*pi*r-------------> 2*pi*26.9=53.8*pi m

Step 2
find the arc length
if 2*pi radians --------------> 53.8*pi m
 (9/5)*pi radians------------> X

X=[(9/5)*pi*53.8*pi]/[2*pi]-------------> [9*53.8*pi]/[5*2]=152.04 m

the answer is 152.04 m

152.04 is right i just took the test

your welcome ;)

glenn raced his motorcycle 30 times last season. he finished first 12 times, second 5 times and crashed in 9 races. what percent of races did he crash? set up a proportion and solve.

Answers

The percent he crashed was 33 percent

Final answer:

Glenn crashed in 30% of the races.

Explanation:

To find the percentage of races Glenn crashed, you can set up a proportion. A proportion is an equation that states that two ratios are equivalent. Since Glenn raced 30 times and crashed 9 times, the ratio of crashes to total races is 9 crashes out of 30 races.

You can set up the proportion as follows:
Crashes / Total Races = Percentage of Crashes / 100

Plugging in the known values gives us this:
9 / 30 = Percentage of Crashes / 100

To solve for the percentage of crashes, you multiply both sides of the equation by 100:
(9 / 30)
100 = Percentage of Crashes

Simplifying gives us:
(9/3) 10 = Percentage of Crashes

Hence, the percentage of races that Glenn crashed is 30%.

It takes 212121 minutes for 555 people to paint 777 walls. How many minutes does it take 333 people to paint 555 walls?

Answers

Solution: We are given that:

5 people can paint 7 walls in 21 minutes

Therefore, 1 person can paint 7 walls in [tex] 21 \times 5=105 [/tex] minutes

Which means 1 person can paint 1 wall in [tex] \frac{105}{7} =15 [/tex] minutes

Now, 3 people can paint 1 wall in [tex] \frac{15}{3} =5 [/tex] minutes

Therefore, 3 people can paint 5 walls in [tex] 5 \times 5=25 [/tex] minutes


Answer:

25 :)

Step-by-step explanation:

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