A student earned a grade of 75% on a math test that had 20 problems. How many problems did the
student answer correctly?

Answer:

8906.4 feet

Step-by-step explanation:

The worker is walking around the park which is the circumference.

The equation for the circumference is diameter times (pi)

since the diameter is 975, you multiply 975 by pi which gives you 2968.8

Because the worker walks around the park 3 times you multiply the circumference by 3 which is 2968.8 times 3 which equals 8906.4

Therefore the worker walks 8906.4 feet a day

Answer:

1/6 chance

Step-by-step explanation:

10+5+3+3+3+6=30 draws

out of 30 draws 5 blue

5/30 reduced is 1/6.

The scarf is $20 without tax.

The scarf is 20% off of 25, 5 is 20% of 25 so all you have to do is 25 - 5 to get your answer.

25 - 5 = 20

The sale price of the scarf , not including the tax is $20.00.

A sale price is the discounted price at which goods or services are being sold.

sale price = original price - discount price

According to the given question,

the original price of the scarf is $25.00

discount price = 20%of original price

⇒ discount price =[tex]\frac{20}{100}[/tex]×[tex]25[/tex]

⇒discount price = $5.00

Therefore,

sale price  of scarf = $25.00-$5.00

Sale price of scarf = $20.00

Hence, the sale price of the scarf, not including tax is $20.00

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Answer:

third graph

Step-by-step explanation:

Answer:

The amount made in a month with 9 sales people = 334,734.53

Step-by-step explanation:

The amount, Y, made by a sales company in dollars is related to the number of sales people, x, at the company through the relation,

Y = 60,209.47x - 207,150.70

where Y = amount made in dollars

x = number of sales people

when x = 9, what is Y.

Y = 60,209.47x - 207,150.70

Y = (60,209.47×9) - 207,150.70

Y = 541,885.23 - 207,150.70

Y = 334,734.53

Hope this Helps!!!

Answer:

10.5 hours

Step-by-step explanation:

Given:

This week Andres will practice with his band for

[tex]1\frac{1}{2} \ means\ \frac{3}{2} \ hours[/tex] on Monday

[tex]1\frac{3}{4} \ means\ \frac{7}{4} \ hours[/tex]  on Tuesday

2 hours Wednesday.

Next week Andres will practice with his band for the same number of hours on Monday, Tuesday, Wednesday.

Question asked:

What was the total number of hours Andres will practice with his band over these 6 days?

Solution:

As she practice for two weeks, three days of each week:

On two Monday, she will practice = [tex]\frac{3}{2} + \frac{3}{2} =\frac{3+3}{2} =\frac{6}{2} =3\ hours[/tex]

On two Tuesday, she will practice = [tex]\frac{7}{4} +\frac{7}{4}=\frac{7+7}{4} =\frac{14}{4} =\frac{7}{2} \ hours[/tex]

On two Wednesday, she will practice = [tex]2+2=4 \ hours[/tex]

Total hours, she will practice over 6 days  [tex]=3+\frac{7}{2} +4[/tex]

                                                                      [tex]=7+\frac{7}{2} \\ \\ =\frac{2\times7+7}{2} \\ \\ =\frac{21}{2} \\ \\ =10.5\ hours[/tex]

Thus, Andres will practice 10.5 hours with his band over these 6 days.

The total number of hours andres will practice with his band over these 6 days is 10 1/2 hours

Given:

Day 1 = 1 1/2 hours

Day 2 = 1 3/4 hours

Day 3 = 2 hours

The total number of hours for six days = 2(1 1/2) + 2(1 3/4) + 2(2)

= 2(3/2) + 2(7/4) + 4

= 6/2 + 14/4 + 4

= 3 + 14/4 + 4

= 7 + 14/4

= (28+14) / 4

= 42 / 4

= 10 2/4

= 10 1/2 hours

Therefore, the total number of hours andres will practice with his band over these 6 days is 10 1/2 hours

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There are 3 even numbers out of A total of 8 numbers.

Each spin would have a 3/8 chance of landing in an even number.

Multiply the chance of landing on even by number of spins:

120 x 3/8 = 360/8 = 45

The answer would be 45 times.

Answer:

22/100 or 0.22 or 22%

Step-by-step explanation:

Out of the 50 times you drew a marble, you got 11 blue ones.

11/50

We can divide 11/50 and get 0.22, which is the same as 22/100 or 22%.

Hope this helps! ;-)

The required probability is,

[tex]P(B)=\frac{11}{50} [/tex]

The total number f marbles are 50

Now, the formula for finding the experimental probability is,

P(B)=Possible outcomes/ Number of outcomes

[tex]P(B)=\frac{11}{50} [/tex]

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Given:

The system of equation:

[tex]x+y = -4[/tex] -------- (1)

[tex]y = x^{2} -6x[/tex] --------- (2)

To find the values of x and y.

We will use substitution method.

From (1) we get,

[tex]y = -4-x[/tex]

We will put the value of y in (1) and we get,

[tex]-x-4 = x^{2} -6x[/tex]

or, [tex]x^{2} -5x+4= 0[/tex]

Now we will apply middle term factor method.

  [tex]x^{2} -(4+1)x+4 = 0[/tex]

     [tex]x^{2} -4x-x +4 = 0[/tex]

[tex]x(x-4)-1(x-4) = 0[/tex]

       [tex](x-4)(x-1)= 0[/tex]

so, x = 4 and 1

Now,

Substitute x = 4 in (1) we get,

[tex]y = -4-4 = -8[/tex]

And putting x = 1 in (1) we get,

[tex]y = -4-1 = -5[/tex]

Hence, the solution of the given system of equation is (4,-8) and (1,-5)

Thus, Option A is the correct answer.

Answer:

50

Step-by-step explanation:

The factors of 150 are: 1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, 150

The factors of 250 are: 1, 2, 5, 10, 25, 50, 125, 250

Then the greatest common factor is 50.

Hope this helped

:)

Answer:

22.9 miles

Step-by-step explanation:

We are given that

Acceleration=Deceleration=a=[tex]4ft/s^2[/tex]

Maximum cruising speed,v=[tex]90mi/h=90\times \frac{5280}{3600}=132ft/s[/tex]

1 hour=3600 s

1 mile=5280 feet

Time,t=15 minutes=[tex]15\times 60=900 s[/tex]

1 min=60 s

Initial speed,u=0

[tex]v=u+at[/tex]

Substitute the values

[tex]132=0+4t[/tex]

[tex]t=\frac{132}{4}=33 s[/tex]

[tex]s=u+\frac{1}{2}at^2=0+\frac{1}{2}(4)(33)^2=2178 ft[/tex]

Distance,d=[tex]speed\times time=vt=132\times 900=118800ft[/tex]

Total distance=s+d=2178+118800=120978ft

Total distance=[tex]\frac{120978}{5280}=22.9miles[/tex]

Hence, the maximum distance traveled by train =22.9 miles

Answer:

the least common denominator is 4xy

There are 75 birds in each section

First, lets see how many in each enclosure so we have an amount to multiply by 3

450/18 = 25 birds per enclosure.

Now lets see how many birds would be in 3 enclosures i.e. a section

25 * 3 = 75

Answer:

The box plot below shows the total amount of time, in minutes, the students of a ... A vertical line is drawn inside the rectangle at the point 55. ... Part B: Calculate the interquartile range of the data, and explain in a ... (2 points) ... make the "whisker" portion longer and could potentially slightly shift the box.

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

Answer:

The answer to your question is     (3, -6)

Step-by-step explanation:

Data

           x  -  2y  =  15                  Equation l

         2x +  4y  = -18                  Equation ll

Solve the system of equations by elimination

-Multiply equation l by 2

         2x  -  4y  =  30

         2x  + 4y  = -18

         4x   + 0    = 12

                    4x = 12

                      x = 12/4

                      x = 3

-Substitute x in equation l

          3  -  2y = 15

-Solve for y

               -2y = 15 - 3

               - 2y = 12

                   y = 12/-2

                   y = -6

-Solution

              (3, -6)

Answer:

C.  x = 3, y = -6

Step-by-step explanation

Answer is correct from Plato

Answer:

orthogonal

Step-by-step explanation:

If the dot product of the two vectors is 0, then they must be orthogonal.

[tex]u*v=9(0)-9(0) = 0[/tex]

Answer: c

Step-by-step explanation: edge 2021

Answer:

150

Step-by-step explanation:

1 box is 5 x 5 which=25 x 6 boxes=150

150 squared is your answer

Answer: 150

Step-by-step explanation:

The side of one cube is 5. 5 * 5 = 25 So 25 is the surface area of one cube side. A cube a 6 sides, and 25 * 6 = 150. Therefore, 150 is the surface area of the cube.

Final answer:

The given system of equations has one unique solution because the lines represented by the equations have different slopes, hence they intersect at exactly one point.

Explanation:

To answer how many solutions there are for the given system of equations:

6y=12x+36
15y=45x+60 (Assuming the '+60' was meant instead of '60', as '+60' makes it a linear equation)

We first simplify both equations to determine if they are identical, parallel, or intersecting.

For the first equation, we divide by 6:

y = 2x + 6

For the second equation, assuming a typo and it should be '+60', we divide by 15:

y = 3x + 4

Since the slopes (2 and 3) are different, the lines are not parallel and will intersect at exactly one point. Therefore, there is one unique solution to this system.

Answer: the minimum score required for the scholarship is 29.24

Step-by-step explanation:

Since the scores are normally distributed, it follows the central limit theorem. The formula for determining the z score is

z = (x - µ)/σ

Where

x = sample mean

µ = population mean

σ = population standard deviation

Since the university plans to award scholarships to students whose scores are in the top 9%, the scores that would be qualified are scores which are at least 91%(100 - 9 = 91).

Looking at the normal distribution table, the z score corresponding to the probability value of 0.91(91/100) is 1.35

From the information given,

µ = 21

σ = 6.1

Therefore,

1.35 = (x - 21)/6.1

6.1 × 1.35 = x - 21

8.235 = x - 21

x = 8.235 + 21 = 29.24

The minimum ACT Reading score required to be in the top 9% for a university scholarship is approximately 29.2, determined by using a z-score of 1.34, the mean score of 21, and the standard deviation of 6.1.

To determine the minimum ACT Reading score required to be in the top 9% of students, and hence eligible for a scholarship at a university, we utilize the concept of z-scores in a normal distribution. A z-score indicates how many standard deviations an element is from the mean.

First, we need to find the z-score that corresponds to the top 9% of the distribution. Standard z-score tables or calculators will show that the z-score for the top 9% is approximately 1.34. This z-score means the score is 1.34 standard deviations above the mean. Next, we apply the z-score formula:

Z = (X - μ) / σ

Where:
Z is the z-score (1.34 in this case),
X is the ACT score we want to find,
μ is the mean (21 for ACT Reading),
σ is the standard deviation (6.1 for ACT Reading).

We can rearrange the formula to solve for X (the ACT score):
X = Z * σ + μ

Substituting the values we have:

X = 1.34 * 6.1 + 21

X ≈ 29.214

The minimum ACT Reading score required for the scholarship is therefore approximately 29.2 when rounded to the nearest tenth.

Answer:

The height of the cross section if 2 feet

Step-by-step explanation:

To solve this problem recall the formula for the area of a trapezoid of bases B (larger base) and b (smaller base) and height H:

[tex]Area = \frac{(B+b)\,H}{2}[/tex]

Therefore, for our case we have:

[tex]Area = \frac{(B+b)\,H}{2}\\34 \,ft^2 = \frac{(28\,ft+6\,ft)\,H}{2}\\34 \,ft^2 = \frac{(34 \,ft)\,H}{2}[/tex]

So, now we can solve for the height H:

[tex]34 \,ft^2 = \frac{(34 \,ft)\,H}{2}\\2\,*\,34 \,ft^2 =34\,ft\,* H\\H=\frac{2\,*\,34 \,ft^2}{34\,ft}\\ H=2\,ft[/tex]

The probabilities of interest when rolling a pair of fair six-sided dice are: P(A) the probability of the first die being a 5 is 1/6, P(B) the probability of the second die being a 3 is 1/6, P(A and B) the probability of both events occurring is 1/36, and P(B|A) the conditional probability of B given A is equal to P(B), indicating that events A and B are independent.

When rolling a pair of fair six-sided dice, each die is independent of the other. Therefore, the sample space consists of 6 x 6 = 36 equally likely outcomes. The probability that the first die is a 5, event A, is P(A) = 1/6 because there are 6 possible outcomes for the first die and only one of them is a 5.

The probability that the second die is a 3, event B, is also P(B) = 1/6 for the same reason as A, as there are 6 possible outcomes and only one of them is a 3. Now, the probability that the first die is a 5 and the second die is a 3, both events occurring simultaneously (A and B), is P(A and B) = P(A) times P(B) which equals 1/36.

The conditional probability that the second die is a 3 given that the first die is a 5, P(B|A), is simply the probability of B since events A and B are independent, so P(B|A) = P(B) = 1/6. This implies that knowing the outcome of the first die does not change the probability of the second die rolling a 3.

Given this independence, P(B|A) = P(B), and thus events A and B are indeed independent events.

[tex](a) \( P(A) = \frac{1}{6} \)\\(b) \( P(B) = \frac{1}{6} \)\\(c) \( P(A \text{ and } B) = \frac{1}{36} \)\\(d) \( P(B|A) = \frac{1}{6} \)\\(e) No, \( P(B|A) \neq P(B) \); events A and B are dependent.[/tex]

(a) P(A), the probability that the first die is a 5:

There are 6 outcomes where the first die is a 5.

[tex]\[ P(A) = \frac{\text{Number of outcomes where first die is a 5}}{\text{Total number of outcomes}} = \frac{6}{36} = \frac{1}{6} \][/tex]

(b) P(B), the probability that the second die is a 3:

There are 6 outcomes where the second die is a 3.

[tex]\[ P(B) = \frac{\text{Number of outcomes where second die is a 3}}{\text{Total number of outcomes}} = \frac{6}{36} = \frac{1}{6} \](c) \( P(A \text{ and } B) \), the probability that the first die is a 5 and the second die is a 3:[/tex]

There is only 1 outcome where the first die is a 5 and the second die is a 3, which is (5,3).

[tex]\[ P(A \text{ and } B) = \frac{\text{Number of outcomes where both A and B occur}}{\text{Total number of outcomes}} = \frac{1}{36} \][/tex]

(d) P(B|A)  the conditional probability that the second die is a 3 given that the first die is a 5:

Given that the first die is a 5, there are 6 possible outcomes for the second die, and 1 of those outcomes is a 3 (the outcome (5,3)).

[tex]\[ P(B|A) = \frac{\text{Number of outcomes where B occurs given A}}{\text{Number of outcomes where A occurs}} = \frac{1}{6} \][/tex]

(e) [tex]\[ P(B|A) = \frac{1}{6} \neq \frac{1}{6} = P(B) \]\\Since \( P(B|A) \neq P(B) \), the events A and B are dependent, not independent.[/tex]

Answer: The answer is B. 1.0

Step-by-step explanation:

That’s the closest mean

Answer:

A is 15.27 and B is 12.05

Step-by-step explanation:

Answer:15

Step-by-step explanation:

I’m on USA test prep

In a triangle, the midsegment is always half the length of the base. Given that the length of AC is 30, the midsegment DE will be half of this which is 15. Thus, the answer is B) 15.

In geometry, a midsegment of a triangle is a line segment that connects the midpoints of two sides of the triangle. For every triangle, the length of the midsegment is always half the length of the base of the triangle.

From your question, the length of AC (which is the base of the triangle) is 30. Therefore, the length of the midsegment DE would be half of 30, which is 15.

So the answer to your question is: B) 15.

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Answer:

[tex]200+48n\leq 3500[/tex]

[tex]n\leq 66.7[/tex]

Step-by-step explanation:

Let the number of cartons he can safely put on the elevator at one time=n

Total weight of Carton=48n

Since the weight of the man and the cartons combined must not be more than 3500 pounds,

Therefore,an inequality that represents the situation is:

[tex]200+48n\leq 3500[/tex]

We can solve for n if required

[tex]200-200+48n\leq 3500-200\\48n\leq 3200\\\text{Divide both sides by 48}\\n\leq66.7[/tex]

The delivery man can safely carry 66 Cartons.

Answer:

[tex]F(t) = 18000(0.6666)^{t}[/tex]

Step-by-step explanation:

The fish population after t years can be modeled by the following equation:

[tex]F(t) = F(0)(1-r)^{t}[/tex]

In which F(0) is the initial population and r is the constant rate of decay.

Year one the fish population was 18000

This means that [tex]F(0) = 18000[/tex]

In year three the fish population was 8000 fish.

Two years later, so [tex]F(2) = 8000[/tex]

[tex]F(t) = F(0)(1-r)^{t}[/tex]

[tex]8000 = 18000(1-r)^{2}[/tex]

[tex](1-r)^{2} = 0.4444[/tex]

[tex]\sqrt{(1-r)^{2}} = \sqrt{0.4444}[/tex]

[tex]1 - r = 0.6666[/tex]

[tex]r = 0.3334[/tex]

So

[tex]F(t) = 18000(0.6666)^{t}[/tex]

Answer:

94.5%

Step-by-step explanation:

Percent decrease can be represented as

[original price] * percentage = [new price]

When trying to find the percentage, you can manipulate the equation by dividing both sides by the original price to get:

percentage = [new price] / [original price]

In this case, this is represented by 192300/203400, or 94.5%

The median home price in the West fell from $203,400 to $192,300 then the percent decrease is 5.5%

percentage, a relative value indicating hundredth parts of any quantity.

Given that In one month, the median home price in the West fell from $203,400 to $192,300.

We have to find the percent decrease.

Percent decrease =[ (difference in price)/(original price) ] ×(100)

=203,400-192,300/203,400 ×(100)

=11100/203,400 ×(100)

=5.457 %

Hence, the median home price in the West fell from $203,400 to $192,300 then the percent decrease is 5.5%

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After simplifying [tex]\(\frac{{21^x}}{{7^x}}\)[/tex], we find it equivalent to [tex]\(3^x\)[/tex], confirming options a, b, and f as correct.

To simplify the expression [tex]\(\frac{{21^x}}{{7^x}}\)[/tex], we can use the property of exponents which states that [tex]\(a^m/a^n = a^{m-n}\)[/tex]. Applying this property, we get:

[tex]\[\frac{{21^x}}{{7^x}} = \frac{{(7 \cdot 3)^x}}{{7^x}} = \frac{{7^x \cdot 3^x}}{{7^x}} = 3^x\][/tex]

So, the simplified expression is [tex]\(3^x\).[/tex]

Now, let's check each option:

a. [tex]\(\frac{{7^x \cdot 3^x}}{{7^x}} = 3^x\)[/tex]. This expression is equivalent to the simplified form.

b. [tex]\((\frac{{21}}{{7}})^x = 3^x\)[/tex]. This expression is equivalent to the simplified form.

c. [tex]\(3\)[/tex]. This expression is not equivalent to the simplified form.

d. [tex]\((21 - 7)^x = 14^x\)[/tex]. This expression is not equivalent to the simplified form.

e. [tex]\(3^{x-7}\)[/tex]. This expression is not equivalent to the simplified form.

f. [tex]\(3^x\)[/tex]. This expression is equivalent to the simplified form.

Therefore, the expressions equivalent to [tex]\(\frac{{21^x}}{{7^x}}\)[/tex] are options a, b, and f.

The question probable maybe:

Given in the attachment