What is -13r+ 20r = -14

It will take 3 tractors approximately 2.4 hours to plow the field.

To find out how many hours it will take 3 tractors to plow the field, we can use the concept of work rates.

Given that 5 tractors can plow the field in 4 hours, we can set up a proportion:

5 tractors / 4 hours = 3 tractors / x hours

Cross-multiplying, we have:

5(x) = 3(4)

Simplifying, we get:

5x = 12

Dividing both sides by 5, we find that x = 2.4 hours.

Therefore, it will take 3 tractors approximately 2.4 hours to plow the field.

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It would take one tractor 20 hours to plow the field, so with the combined rate of three tractors, it will take them approximately 6.67 hours to plow the field together.

The subject of this question is work-rate problems in Mathematics. To solve this problem, we must first determine the rate at which a single tractor can plow the field. If five tractors can plow a field in four hours, then one tractor would take five times as long, or 20 hours, to plow that same field alone.

Knowing this, we can now calculate how long it would take three tractors to plow the field together. Since one tractor takes 20 hours to plow the field, the rate of one tractor is 1 field per 20 hours. Therefore, three tractors would work at a rate of 3 fields per 20 hours, and so, it will take them 20/3, or approximately 6.67 hours to plow the field together.

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Answer:

You would graph a point at the origin with a slope of 1

Step-by-step explanation:

Y=x means whatever the y value is, the x is the same.

Answer:

1

Step-by-step explanation:

The equation for graphing is y=mx+b and if it’s y=x then it means y=1x because when x is left alone it equals to 1

Answer:

There are 500 staples in each package.

Step-by-step explanation:

This is a simple problem which requires us to tell number of staples each package have. The total number of staples in the catoon and the total number of staples that each package have is given in the question. So we can easily calculate total number of staples that each package have by dividing total number of staples in the cartoon by number of staples each packet have i.e.

25,000/50 = 500

Answer:

y-5=-3(x-3)

Step-by-step explanation:

y-y1=m(x-x1)

y-5=-3(x-3)

Answer:

Cougar population was 790 at the beginning

830-790=40

Answer:

4 students would be eligible for the scholarships

Step-by-step explanation:

Final answer:

In a high school with 400 graduating students, only 4 students would be eligible for scholarships that are offered to students in the top 1% of their class by GPA.

Explanation:

To determine how many students from a high school with 400 graduating students would be eligible for scholarships offered to those in the top 1% of their class, we simply need to calculate 1% of 400. Mathematically, this is represented as:

400 students * 1% = 400 students * 0.01 = 4 students

Therefore, in a high school graduating class of 400 students, only 4 students would be eligible for these scholarships based on being in the top 1% of their class according to GPA.

Answer:

i

Step-by-step explanation:

Answer:A should be the best answer to this problem

Step-by-step explanation:

Answer:

The ratio of boys to girls is 7:6

Step-by-step explanation:

1/2 of 14 is 7. So the boys would be equal to 7. 1/2 of 12 is 6.

So the girls would be equal to 6. If you put that in a ratio it would be 7(boys):6(girls) = 7:6

Therefore your answer is A: The ratio of boys to girls is 7:6

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Answer:

B and D

Step-by-step explanation:

The graph of a proportional relationship is a straight line graph which must pass through the origin.

The only straight line graphs which pass through the origin are B and D

Answer:

Step-by-step explanation:

The formula of an area of a circle:

[tex]A=\pi r^2[/tex]

r - radius

We have

[tex]A=706.9\ mm^2[/tex]

Substitute:

[tex]\pi r^2=706.9[/tex]          divide both sides by π

[tex]r^2=\dfrac{706.9}{\pi}[/tex]        use π ≈ 3.14

[tex]r^2\approx\dfrac{706.9}{3.14}\\\\r^2\approx225\to r=\sqrt{225}\\\\r= 15\ mm[/tex]

The diameter d = 2r.

Therefore

[tex]d=2(15)=30\ mm[/tex]

Answer:

30mm

Step-by-step explanation:

A=[tex]\pi[/tex][tex]r^{2}[/tex]

Substitute 706.9 for A and [tex]\pi[/tex] for 3.14

706.9= 3.14[tex]r^{2}[/tex]             divided both sides by 706.9

when you divided 3.14 by 3.14 it will cross and when you divide 706.9 by 3.14 it will give you 225.

[tex]\sqrt{225}[/tex]

15 times 15 is 225

radius= 15

d=2r

multiply 15 by 2

the answer is 30.

Answer:

width = (x-1)

Step-by-step explanation:

The volume of the prisms is defined in the problem as

Volume = x^3 + 9x^2 + 6x − 16

Volume  = width*height* length

And we know that,

length = (x+2)

height = (x+8)

We can find the roots of the equation, which happen to be

x = -8

x = -2

x = 1

(See image below)

This means that the volume can be represented as

Volume = x^3 + 9x^2 + 6x − 16 = (x+8)(x+2)*(x-1)

Therefore,

The width = (x-1)

Step-by-step explanation:

Answer:

y = 3x

Step-by-step explanation:

Given

9x - y = - 6x + 4y ( subtract 4y from both sides )

9x - 5y = - 6x ( subtract 9x from both sides )

- 5y = - 15x ( divide both sides by - 5 )

y = 3x

Answer:

72.3%

Step-by-step explanation:

The question deals with setting up and solving an equation to find the cost of a clock, when the total cost for a chess set and clock is given. The cost of a clock is found to be $15.

The subject of this question is Mathematics, specifically dealing with setting up and solving an equation. The total cost of the chess set and clock for each member is $125/5 = $25. Jenna knows that the chess set costs $10. So, the cost of a clock would be $25 - $10 = $15. Therefore, the cost of a clock is $15.

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Answer:

[tex]\displaystyle x = 8[/tex]

Step-by-step explanation:

Anything set to equal x is considered an undefined rate of change [slope], which is a vertical line. This is not a function, since it flunks the vertical line test.

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Answer:

-3.5 degrees per hour

[tex] - 3.5t[/tex]

Step-by-step explanation:

The total change is temperature is -12.25 degrees.

The total time is 3.5 hours.

This means that temperature changes by -3.5 degrees per hour (-12.25 degrees ÷ 3.5 hours).

As an expression of hours, simple multiply the coefficient by a variable. I'm assuming the letter t for time (where t is the number of hours):

[tex] - 3.5t[/tex]

Answer:

The factors of  [tex]2(x+y)^2-9(x+y)-5[/tex] is ((x+y)-5)(2x+2y+1)

Step-by-step explanation:

Given polynomial

=>[tex]2(x+y)^2-9(x+y)-5[/tex]

To Find:

The factors of the polynomial =?

Solution:

Lets assume  k = (x+y)

Then [tex]2(x+y)^2-9(x+y)-5[/tex] can be written as [tex]2k^2-9k-5[/tex]

Now by using quadratic formula

k =[tex]\frac{-b\pm\sqrt{(b^2-4ac}}{2a}[/tex]

where

a= 2

b= -9

c= -5

Substituting the values, we get

k =[tex]\frac{-b\pm\sqrt{(b^2-4ac)}}{2a}[/tex]

k =[tex]\frac{-(-9) \pm \sqrt{((-9)^2-4(2)(-5)}}{2(2))}[/tex]

k =[tex]\frac{-(-9) \pm \sqrt{(81+40)}}{4}[/tex]

k =[tex]\frac{-(-9) \pm \sqrt{(121)}}{4}[/tex]

k =[tex]\frac{-(-9) \pm 11}}{4}[/tex]

k= [tex]\frac{ 9 \pm 11}{4}[/tex]

k =  [tex]\frac{20}{4}[/tex]                         k =  [tex]\frac{-2}{4}[/tex]    

[tex]k_1 =5[/tex]                                      [tex]k_2 = -\frac{1}{2}[/tex]

[tex]2k^2-9k-5= 2(k-5)(k+\frac{1}{2})[/tex]

Solving the RHS we get

[tex]\frac{2}{2}(k-5)(2k+1)[/tex]

[tex](k-5)(2k+1)[/tex]

Substituting k = x+y

[tex]((x+y)-5)(2(x+y+1)[/tex]

[tex]((x+y)-5)(2x+2y+1)[/tex]

To determine which decimal is bigger between 0.33 and 0.34, we compare the digits after the decimal point. Since the hundredths place in 0.34 is 4 and in 0.33 is 3, 0.34 is the larger decimal.

The question is asking to compare two decimals to determine which is larger. To compare 0.33 and 0.34, you look at the digits from left to right. Both numbers have a 0 before the decimal point, so you compare the digits after the decimal point. First, you compare the tenths place, the digit immediately after the decimal point. In both numbers, this digit is 3, so they are equal up to this point. Next, you look at the hundredths place, the next digit to the right. In 0.33, the digit is 3, while in 0.34, the digit is 4. Because 4 is greater than 3, 0.34 is the larger decimal.

Final answer:

0.34 is larger than 0.33 because the digit in the hundredths place is greater for 0.34.

Explanation:

When comparing two decimals, 0.33 and 0.34, we can determine which is larger by examining the digits from left to right. Here, both numbers have 0 before the decimal point and a '3' in the tenths place, but they differ in the hundredths place. Since 4 is greater than 3, the decimal 0.34 is larger than 0.33. To compare 0.33 and 0.34, we can look at the digits to the right of the decimal point. In this case, 0.34 has a larger digit than 0.33, so it is bigger.

In the equation y=2/7x, y is directly proportional to x.

To determine if the equation y = (2/7)x represents a proportional relationship, you can check if it fits the criteria for proportionality. In a proportional relationship, the ratio between y and x should remain constant. This means that if you double x, y should also double, and so on.

In the equation y = (2/7)x, the coefficient 2/7 is a constant, and it is the same for all values of x.

Therefore, this equation represents a proportional relationship.

In this case, if you double the value of x, the value of y will also double, and if you triple x, y will also become three times its original value, and so on. This is a key characteristic of a proportional relationship.

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Equation 1:

Answer:

x = 1.22

Step-by-step explanation:

[tex]\frac{5x-1}{8} -\frac{5-7x}{2} = \frac{3(6-x)}{6}[/tex]

[tex]\frac{2(5x-1) - 8(5-7x)}{16} = \frac{3(6-x)}{6}[/tex]

[tex]\frac{(10x-2) - (40-56x)}{16} = \frac{3(6-x)}{6}[/tex]

[tex]\frac{(10x-2-40+56x)}{16} = \frac{3(6-x)}{6}[/tex]

[tex]\frac{(66x-42)}{16} = \frac{3(6-x)}{6}[/tex]

[tex]\frac{(66x-42)}{16} = \frac{(18-3x)}{6}[/tex]

[tex](66x-42) \times 6 = (18-3x) \times 16[/tex]

[tex](396x-252) = (288-48x)[/tex]

[tex](396x +48x) = (288+252)[/tex]

[tex]444x = (540)[/tex]

[tex]x = \frac{540}{444}[/tex]

x = 1.22

Equation 2:

Answer:

x = -13.97

Step-by-step explanation:

[tex]\frac{x}{3} - \frac{7(x-2)}{9} = 4- \frac{2x-5}{6}[/tex]

[tex]\frac{9x-3(7(x-2))}{27} = 4- \frac{2x-5}{6}[/tex]

[tex]\frac{9x-3(7x-14))}{27} = 4- \frac{2x-5}{6}[/tex]

[tex]\frac{9x-(21x-42))}{27} = 4- \frac{2x-5}{6}[/tex]

[tex]\frac{9x-(21x-42)}{27} = \frac{24 - (2x-5)}{6}[/tex]

[tex]\frac{-12x+42}{27} = \frac{-2x+29}{6}[/tex]

[tex](-12x+42) \times 6 = (-2x+29) \times 27[/tex]

[tex](-72x+252) = (-34x+783) [/tex]

[tex](252-783) = (-34x +72x) [/tex]

[tex](-531) = (38x) [/tex]

[tex]x =\frac {-531}{38}[/tex]

x = -13.97

Answer:

118 miles

Step-by-step explanation:

Assuming that a month has 4 weeks

Each week has 5 weekdays.

The number of weekdays in a month is the number of weeks times 5.

4 X 5 = 20

Multiply the number of weekdays in a month by 5.9 miles.

20 X 5.9 miles = 118 miles

Therefore he runs 118 miles every months.

Answer:

x=2

Step-by-step explanation:

101-13.7x=73.6

13.7x=101-73.6

13.7x=27.4

x=27.4/13.7

x=2

Answer:

Step-by-step explanation:

well....there's a few

101 - 13.7x = 73.6

can be written like :

101 - 73.6 = 13.7x

or

- 13.7x = - 101 + 73.6

or

27.4 = 13.7x

or

27.4 / 13.7 = x

Is that what you mean ?

Answer:

Discrete random variable

Step-by-step explanation:

We are given the following in the question:

x is the number of number of oranges purchased in a grocery store.

Thus, it have the following properties.

Thus, it is a discrete random variable

Answer:

distance between points=13 units

Step-by-step explanation:

distance between points=[tex]\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]

put [tex](x_1,x_2)[/tex]=(8,7) and [tex](y_1,y_2)[/tex]=(3,-5)

distance between points=[tex]\sqrt{(3-8)^2+(-5-7)^2}[/tex]

distance between points=[tex]\sqrt{(-5)^2+(-12)^2}[/tex]

distance between points=[tex]\sqrt{25+144}[/tex]

distance between points=[tex]\sqrt{169}[/tex]

distance between points=13 units answer

Answer:

[tex]x_{123} x^{2} \sqrt{x} \neq \sqrt{x} \sqrt{x} \geq \neq \pi \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right]  \lim_{n \to \infty} a_n \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] x^{2} \pi[/tex]

Step-by-step explanation:

because im smart

Answer:

see explanation

Step-by-step explanation:

The measure of arc AE is

AE = 360° - (100 + 40 + 60)° = 360° - 200° = 160°

∠ BCD = 0.5( m arc AE - m arc BD ), that is

x = 0.5(160 - 40) = 0.5 × 120 = 60

" Rachel must pay a $20 membership fee to join the gym " can be interpreted from the y-intercept of the function ⇒ D

Step-by-step explanation:

The form of the linear function is f(x) = mx + b, where

∵ f(x) = 37 x + 20 models the total cost for Rachel to be a member

   at a gym for x months

∵ f(x) = m x + b

∴ m = 37 and b = 20

∵ m represents the rate of change

- That means she must to pay 37 per month for x months

∴ Rachel must pay $37 per month to use the gym

∵ b represents the initial amount

- That means she pays a fixed amount one time

∴ Rachel must pay a $20 membership fee to join the gym

" Rachel must pay a $20 membership fee to join the gym " can be interpreted from the y-intercept of the function

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Answer:

A

Step-by-step explanation:

The equation of a parabola in vertex form is

y = a(x - h)² + k

where (h, k) are the coordinates of the vertex and a is a multiplier

Here (h, k) = (2, 1), thus

y = a(x - 2)² + 1

To find a substitute (1, 0) into the equation

0 = a(1 - 2)² + 1

0 = a + 1 ( subtract 1 from both sides )

a = - 1

Hence

y = - (x - 2)² + 1 or

y = 1 - (x - 2)² → A

The equation of the parabola with its vertex at (2, 1) and that crosses the x-axis at (1, 0) is y=1-(x - 2)^2.

The vertex form of a parabola's equation is y=a(x-h)^2+k where (h, k) is the vertex. Here, the vertex is given as (2, 1). Also, it crosses the x-axis at (1,0), which makes it a downward-facing parabola(as y=0 when x=1), and hence, 'a' is negative. Now, we can compare the given options with these details.

Option A: y=1-(x - 2)^2 perfectly matches our requirements, because it's in the correct vertex form, and 'a' is negative (-1) which corresponds to a downward parabola.

So, the equation of the parabola with its vertex at (2,1) and that crosses the x-axis at (1,0) is y=1-(x - 2)^2.

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