please help quickly !

Answer:

Step-by-step explanation:

Let y represent the amount of money earned, and x the number of cars they wash. Then

y = 5x

Why? Each car wash costs $5. So no car washes means no earnings; 1 car wash earns $5; 2 washes earn $10; 3 washes earn $15, and so on, so that x car washes generate $5x.

2. No matter how many cars they end up washing, they will have spent $75 to set up the operation, so you subtract 75 from the equation is part (1).

3. Taking into account the setup cost of $75, the profit they make is given by

y = 5x - 75

Answer:

18 ounces

Step-by-step explanation:

Answer:

im not sure but maybe it should be 18 ounces

The compound inequality for the given graph is found as:

4≤ x < 7.

As shown in the diagram.

Let x be the variable.

As seen from the graph, x lies in the value of 4 as it is closed interval. Thus, will be included in the interval.

And x lies in the value of 7 as it is open interval. Thus, 7 is not included in the interval.

Thus, the compound inequality for the given graph is found as:

4≤ x < 7.

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Answer:

85

Step-by-step explanation:

You can set this up as an algebraic equation by assigning variables to each part of the question.      So you could say  Y - 13 = 72    If you are in middle school they will expect all that.  

If you want the easy way you could say,  72 + 13= 85 because we beat you by 13 and you only scored 72 points.   So I add 13 to their lame score and we  get my great score.  

Answer:

the answer is 85

Step-by-step explanation:

Answer:

Step-by-step explanation:

7.

n=5 (given)

3n=15

3n-7=8

-10(3n-7)=-80

Check:

-10(3(5)-7)=-80

-10(15-7)=-80

-10(8)=-80

-80=-80

For 8 you can create your own descriptions of the next step (i.e Multiply both sides by 2) and just build a different equation from there.

Answer:

number 2

Step-by-step explanation:

Purchase at Pants World, because the cost after the discount will be $30. Then the correct option is B.

Algebra is the study of abstract symbols, while logic is the manipulation of all those ideas.

The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.

The cost of jeans at the Pants world is calculated as,

⇒ $40 - 25% of $40

⇒ $40 - 0.25 x $40

⇒ $40 - $10

⇒ $30

The cost of jeans at All Clothes is calculated as,

⇒ $38 - $6

⇒ $32

Purchase at Pants World, because the cost after the discount will be $30. Then the correct option is B.

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Yes, the average family size obtained from asking students at an elementary school would likely be biased. The average is likely to underestimate the true value of the family size for the population.

This is because a student’s family size only includes individuals who are living in the same household as the student and not everyone in the family.

For example, the student's siblings who have left the household to attend college or have moved out for other reasons would not be included in the student's family size estimate. Additionally, grandparents, uncles, aunts, and cousins who may also be part of the family are not included. Thus, the average family size obtained from asking students would be lower than the true average family size for the population.

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Answer:

14 Whole Dumplings

Step-by-step explanation:

Omar has 2 3/4 cup of dough to make dumplings. if he uses 3/16 cup of Dough for each dumpling how many whole dumplings can Omar make? Omar can make 14 whole dumplings.

Answer:

13

Step-by-step explanation:

this is because you have to look for the most common number

32 centimeters is approximately equal to 1 foot and 0.6 inches. To convert 32 centimeters to inches, we can use the conversion factor of 1 inch = 2.54 centimeters.

First, we can convert centimeters to inches by dividing 32 by 2.54:

32 cm ÷ 2.54 cm/in = 12.5984 in

Next, we can convert inches to feet by dividing the number of inches by 12:

12.5984 in ÷ 12 in/ft = 1.0499 ft

To express this answer in feet and inches, we can separate the whole number of feet from the remaining inches:

1 ft + 0.0499 ft = 1 ft + (0.0499 ft × 12 in/ft) = 1 ft 0.5988 in

In summary, to convert centimeters to feet and inches, we first convert centimeters to inches using the conversion factor of 1 inch = 2.54 centimeters, and then divide the number of inches by 12 to obtain the number of feet, with any remaining inches expressed as a fraction of a foot.

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Answer:

b

Step-by-step explanation:

Answer:

c

Step-by-step explanation:

a = 48 coins   4 x 6 = 24    3 x 8 = 24     24 + 24 = 48

b = 52 coins   2 x 6 = 12     5 x 8 = 40     40 + 12 = 52

c = 50 coins   3 x 6 =18      4 x 8 = 32      32 + 18 = 50   correct

d = 46 coins   5 x 6 = 30    2 x 8 = 16       30 + 16 = 46

2 miles per day? Maybe that’s the answer

Answer: 4/3 miles or 1 1/3 miles per day

Answer:

$6000

increases by 10% but you then take away 5% fron the 10 as it decreases by 5. meaning you have incresed by 5% and adding the 15% equals 20%. so the account increases by 20%. 20% of 5000 equals 1000. add the two together and you get 6000. so the account total now is $6000

The value of a = -2 and b = 3.

What is a system of equations?

A finite set of equations for which common solutions are sought is referred to in mathematics as a set of simultaneous equations, often known as a system of equations or an equation system.

Here, we have

Given: 3a - 5b = -26, a + 2b = 6

We have to solve this equation.

3a - 5b = -26...(1)

a + 2b = 6...(2)

Now we multiply equation (1) by 2 and equation (2) by 5 and we get

6a - 10b = -52....(3)

5a + 10b = 30....(4)

After solving equations (3) and (4), we get

11a = -22

a = -2

Now we put the value of 'a' in equation(3) and we get

6(-2) - 10b = -52

-10b = -52 + 12

-10b =  -30

b = 3

Hence, the value of a = -2 and b = 3.

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Answer:

24.25

Step-by-step explanation:

16x^0+2x^2+y^-1

16(2^0)+2(2^2)+4^-1

16(1)+2(4)+0.25

16+8+0.25

24.25

The 95% confidence interval for the population variance o2  if a sample of size 25 has standard deviation s = 17 is (1833.49, 2879.62), rounded to two decimal places.

To construct a 95% confidence interval for the population variance o2, we can use the chi-square distribution.

First, we need to find the chi-square values for the lower and upper bounds of the confidence interval. We can use the formula:

chi-square (α/2, n-1) ≤ ((n-1) * s^2) / o2 ≤ chi-square (1-α/2, n-1)

where α is the level of significance (0.05 for a 95% confidence interval), n is the sample size (25 in this case), s is the sample standard deviation (17), and o2 is the population variance we are trying to estimate.

Using a chi-square table or calculator, we can find that chi-square (0.025, 24) = 38.58 and chi-square (0.975, 24) = 11.07.

Plugging in the values we have, we get:

38.58 ≤ ((24) * (17)^2) / o2 ≤ 11.07

Solving for o2, we get:

o2 ≤ ((24) * (17)^2) / 38.58 = 1833.49

o2 ≥ ((24) * (17)^2) / 11.07 = 2879.62

Therefore,  the 95% confidence interval for the population variance o2 is (1833.49, 2879.62), rounded to two decimal places.

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The correct choice is: C. Errors ≤ 0.05 for M ≤ 1

To estimate the absolute error in approximating cos(0.48) using the 3rd order Taylor polynomial centered at 0, we'll use the remainder term. The remainder term for a Taylor series is given by:

R_n(x) = (f^{(n+1)}(c) * (x - a)^{(n+1)}) / (n+1)!

Here, f(x) is cos(x), x = 0.48, a = 0 (center), n = 3 (order), and c is a value between a and x.

Since f(x) = cos(x), the derivatives will cycle through the trigonometric functions. Specifically:

f(x) = cos(x)
f'(x) = -sin(x)
f''(x) = -cos(x)
f'''(x) = sin(x)
f''''(x) = cos(x)

Since n = 3, we need the 4th derivative, which is f''''(x) = cos(x). Since |cos(c)| is at most 1 for all c, we have:

|M| ≤ 1

Now, we can plug everything into the remainder term formula:

R_3(0.48) ≤ (1 * (0.48)^4) / (4!)

R_3(0.48) ≤ (0.48^4) / 24

R_3(0.48) ≤ 0.053130496

The absolute error in approximating cos(0.48) using the 3rd order Taylor polynomial centered at 0 is less than or equal to 0.053130496. Rounded to two decimal places, the error is ≤ 0.05. So, the correct choice is:

C. Errors ≤ 0.05 for M ≤ 1

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The correct answer is B

The angle value of m is m∠7 = m∠3 = 125° in linear pair.

What linear pair?

m∠1 = 180° - 55° = 125°

m∠2 =  55° [ vertical angle ]

m∠3 = m∠1 = 125°  [  vertical angle ]

m∠4 = 180° - m∠3 = 180 - 25 = 55°

m∠5 = m∠1 = 125°

m∠6 = m∠2  = 55°

m∠7 = m∠3 = 125°

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The decrease in diameter of the bar due to the applied load is -0.005434905d and the final diameter of the bar is 1.005434905d.

A compressive load of 80,000 lb is applied to a bar with a circular section of 0.75 in diameter and a length of 10 in.

if the modulus of elasticity of the bar material is 10,000 ksi and the Poisson's ratio is 0.3.

We have to determine the decrease in diameter of the bar due to the applied load.

Let d be the initial diameter of the bar and ∆d be the decrease in diameter of the bar due to the applied load, then the final diameter of the bar is d - ∆d.

Length of the bar, L = 10 in

Cross-sectional area of the bar, A = πd²/4 = π(0.75)²/4 = 0.4418 in²

Stress produced by the applied load,σ = P/A

= 80,000/0.4418

= 181163.5 psi

Young's modulus of elasticity, E = 10,000 ksi

Poisson's ratio, ν = 0.3

The longitudinal strain produced in the bar, ɛ = σ/E

= 181163.5/10,000,000

= 0.01811635

The lateral strain produced in the bar, υ = νɛ

= 0.3 × 0.01811635

= 0.005434905'

The decrease in diameter of the bar due to the applied load, ∆d/d = -υ

= -0.005434905∆d

= -0.005434905d

The final diameter of the bar,

d - ∆d = d + 0.005434905d

= 1.005434905d

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It is possible to draw more 36cm rectangles than 23cm rectangles if the lengths must be whole numbers.

To understand why this is the case, we can examine the factors of each number.

For a rectangle with a length of 36cm, the factors are 1, 2, 3, 4, 6, 9, 12, 18, and 36. These are the possible whole number widths that can be paired with a length of 36cm to form a rectangle.

For a rectangle with a length of 23cm, the factors are 1 and 23. These are the only possible whole number widths that can be paired with a length of 23cm to form a rectangle.

If we compare the number of factors, we can see that 36 has more factors than 23. This means that there are more possible whole number widths that can be paired with a length of 36cm, resulting in more 36cm rectangles than 23cm rectangles.

The number of factors determines the number of possible whole number widths that can be paired with a given length to form rectangles. Since 36 has more factors than 23, there are more possible whole number widths for a 36cm length, resulting in more 36cm rectangles compared to 23cm rectangles.

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From the Venn diagram , the value of  required probability P(A∪B) is given by :

Option a). 0.6 . The probability that students  takes both Spanish and Chemistry.

Let us consider 'A' be the probability of the students who takes Chemistry.

And 'B' be the probability of the students who takes Spanish.

From the Venn diagram we have,

Probability of A 'P(A) ' = 0.2 + 0.1

                                    = 0.3

Probability of B 'P(B)' = 0.3 + 0.1

                                   = 0.4

Probability of A∩B 'P(A∩B)' = 0.1

Probability of A∪B is given by :

P(A∪B) = P(A) + P(B) - P(A∩B)

Substitute the value we get ,

⇒ P(A∪B) = 0.3 + 0.4 - 0.1

⇒ P(A∪B) =  0.6

P(A∪B) represents the probability of the students that takes both Chemistry and Spanish.

Therefore, the value and explanation of P(A∪B)  is equal to :

Option a). 0.6 , the probability of the students that takes both Chemistry and Spanish.

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The above question is incomplete , the complete question is:

The - Venn diagram below describes the probability of students who will take Chemistry and Spanish at Jefferson High School next year, where A Student takes chemistry and B Students takes Spanish. Suppose one student is chosen at random Use the attached Venn diagram .

Find the value of P(A∪B) and describe in words.

a.) 0.6; The probability that the student takes both chemistry and Spanish.

b.) 0.1; The probability that the student takes both chemistry and Spanish.

c.) 0.1; The probability that the student takes either chemistry or Spanish; but not both.

d.)0.6; The probability that the student takes either chemistry or Spanish, or both.

Venn diagram is attached.

2 possible answers for every out of 24 questions, therefore there are \(2^{24}=16777216\) ways to answer the test.

Answer:

20079.05 cm^2,

Step-by-step explanation:

Surface area of the box without the lid

=  90*42 + 2(90*34) + 2(42*34) = 12756.

Now find Surface area of the half cylinder:

The diameter of the 2 half circles = 42 so the radius = 21.

The area of the lid  

= 2 + 1/2 π (21)^2 + π r * 90

= 7323,052

Total = 20079.052

Answer: answer for what?

Step-by-step explanation: oh I see it appeared iN wrong catogory I’m browsing History sorry

Answer:

-3ab

Step-by-step explanation:

-27/9= 3

(a^2)/a=a

(b^2)/b=b

Answer:

x=8

7x=56

Step-by-step explanation:

Ans is given below

Step-by-step explanation:

Domain :(5,9,0,5)

Range: (5,7,5,5)