Mathematics Middle School

Mario earns money mowing his neighbors' lawns. The revenue for mowing x lawns is r(x) = 25x. Mario's cost for gas and the mower rental is c(x) = 6x + 15. his profit from mowing is x lawns is p(x) = (r-c)(x). What is p(x)

Answers

Answer 1
I know for this one the answer is p(x)=  19x-15
Answer 2

Answer:

The value of p(x) is 19x - 15.

Step-by-step explanation:

Given,

The revenue mowing x lawns is, r(x) = 25x.

Also, Mario's cost for gas and the mower rental is c(x) = 6x + 15.

Hence, his profit from mowing is x lawns is,

p(x) = (r-c)(x) = r(x) - c(x)    ( Subtracting functions property )

By substituting values,

p(x) = 25x - ( 6x+ 15 )

= 25x - 6x - 15       ( Associative property )

= 19x - 15

Related Questions

The function f(x) varies inversely with x and f(x) = 0.9 when x = 0.5 what is f(x) when x = 1.5 ? a. 0.02 b. 0.03 c. 0.3 d.0.75 PLEASE HELP ME I WILL MARK BRAINLIEST!!!!!!!!!!!!!

Answers

0.3 C) this is the answer i calculated it ok your welcome

Answer:

The answer is 0.3

Step-by-step explanation:

Can you make a triangle with only acute angles, and none of the sides is the same length? If no can you please explain?

Answers

Yes you can
Hope this helps
Yes, I do think so. If you take a normal acute triangle such as an equilateral with all 60 degree sides, if you made one angle 70 degrees, and one 50, then that would still make 180 degrees, and fit. 

(Quick summary if that looks strange: 60 + 70 + 50 are all acute angles and none are the same!)
Hope i helped :)

A sign says that the price marked on all music equipment is at a discount for 30% off. You buy an electric guitar for the same price of $315.
{Im only in 7th grade.}
What is the percent you pay? _____________
Write an equation to find the regular price of the item. __________________
What was the regular price? ____________

Answers

Hi there!

a. So the electric guitar is sold for a sale price of $315 after the discount. The discount was 30%. Even though we get that amount off, we still pay 70% of the original price, because 100% (original price) - 30% is 70%.

b. An equation that can help us find the regular price of the item is through writing and solving a proportion. Set it up like this:

315/x = 70/100

This is because 315 is part of the whole and is 70% of the value of x.

How to solve it:

Okay. Let's solve this by cross multiplying the values. 315 * 100 is 31,500. 70 * x is 70x. That simplifies to 31,500 = 70x. Didivde each side by 70 to isolate the x. 70x/70 cancels out. 31,500/70 is 450. Let's check this by multiply the number by 70% and see what happens. 450 * 70% (0.7) is 315. There. x = 450. The regular price was $450.
Final answer:

The percent paid after a 30% discount is 70% of the regular price. The equation to find the regular price is 0.70 * P = $315. Solving this gives us the regular price of the electric guitar, which is $450.

Explanation:

If a sign says that the price marked on all music equipment is at a discount for 30% off, and you buy an electric guitar for $315, we need to figure out the percent you actually pay and the regular price of the guitar.

Since the discount is 30%, you pay 100% - 30% = 70% of the regular price.

Let's call the regular price 'P'. The equation to find the regular price of the item after a 30% discount is:

0.70 * P = $315

To find the regular price 'P', we divide both sides of the equation by 0.70:

P = $315 / 0.70

P = $450

The regular price of the electric guitar before the discount was $450.

a soccer field has a length of 100 yards and a width of 60 yards .which equation can you use to find the area of the soccer field

Answers

60 × 100

Since the formula for area of a rectangle is length × width, multiplying the sides will get you the area.

Hope this helps!

Final answer:

To find the area of a soccer field with a length of 100 yards and a width of 60 yards, the equation used is Area = 100 yards × 60 yards, resulting in an area of 6000 square yards.

Explanation:

To calculate the area of a soccer field with a length of 100 yards and a width of 60 yards, we can use the formula for the area of a rectangle, which is Area = length × width. In this case, we would calculate the area as follows:

Step 1: Identify the Formula

Area = length × width

Step 2: Plug in the Measurements

Area = 100 yards × 60 yards

Step 3: Calculate the Area

Area = 6000 square yards

Therefore, the equation to find the area of the soccer field is Area = 100 yards × 60 yards, giving us an area of 6000 square yards.

What is the area of the figure?

A. 617.5 m^2
B. 824 m^2
C. 759 m^2
713.5 m^2

Answers

Hey !!

Check the attachment.

Hence, On proper calculations ,
We get our answer as D) 713.5 m^2


Hope it helps you :)

Choose the correct simplification of (4x3 − 3x − 7) + (3x3 + 5x + 3). (5 points) 7x3 − 2x − 4 x3 − 8x − 10 7x3 + 2x − 4 x3 + 8x + 10

Answers

(4x3-3x-7)+(3x3+5x+3)= 7x3+2x-4

Whats the original price for this?

Answers

75 dollars who doesn't know that
original price is $93.75

what is 78 million in scientic notation?

Answers

In this problem, you are asked to write a number in scientific notation. In figures, 78 million would look like this:

78,000,000

To write this to scientific notation, you have to move the decimal point to the left until you will get a number between 1 and 10.

Here, you will have to move the decimal point 7 times to get 7.8

The exponent of the scientific notation is the number of times you moved your decimal point. Since the movement of decimal point is going to the left, you will have a positive exponent.

The scientific notation would look like this:

7.8 x 10^7

That would be 7.8 * 10^7

Thomas has to type 1200 words. He has already typed 300 words. he can type 60 words per minute. Determine the number of minutes it will take him to finish typing.

Answers

15 minutes; First, you do 1,200-300, since he has already typed 300. (1200-300=900) Then you divide 900 by the number of words he has typed (60), and you get 15.

The number of taxi accidents is approximated by y equals negative 143.3 x squared plus 1823.3 x plus 6820 and the number of injuries is approximated by y equals negative 416.72 x squared plus 4416.7 x plus 8500. Let xequals0 represents​ 1990, xequals1 represents​ 1991, and so on.

Answers

Answer:
number of taxi accidents = 12235.2 which is approximately approximately 12235 accidents

Explanation:
The equation for the number of accidents is given as:
y = -143.3 x² +1823.3 x + 6820

We are given that:
x = 0 represents 1990
x = 1 represents 1991
Therefore:
x = 8 represents 1998

Now, all we have to do is substitute with the value of x = 8 in the equation of accidents to get the number of taxi accidents in 1998 as follows:
y = -143.3 (8)² +1823.3 (8) + 6820
y = -143.3 (64) + 1823.3 (8) + 6820
y = -9171.2 + 14586.4 + 6820
y = 12235.2

If we are asked to approximate the answer, then it would be approximately 12235 accidents

Hope this helps :)

I'll give brainliest to whoever shows their work. Plz answer fast.
Jana is ordering a list of numbers from least to greatest.
Which statement can be used to create her list?
A) The square root of 0.8 is less than 4/5 because 0.8= 4/5 and the square root of a number less than 1 is less than the number itself.
B) The square root of 7 is greater than the square root of 7^2 because the square root of 7^2=7 and the square root of a number greater than 1 is greater than the number itself.
C) (The square root of 5)^2 is less than the square root of 7 because (The square root of 5)^2= 5 and the square root of 7 is between 6 and 8.
D) the square root of 7 is greater than 4/5 because 4/5 is less than 1 and the square root of a number greater than 1 is greater than 1.

Answers

Lets check the validity of each one of our statements:

Statement A is false. The square root of a number less than 1 is greater than the number itself. In fact, [tex] \sqrt{ \frac{4}{5} } = \sqrt{0.8} =0.89[/tex]. Since [tex]0.89[/tex] is greater than [tex]0.8[/tex], [tex] \sqrt{0.8} [/tex] is greater than [tex] \frac{4}{5} [/tex]; therefore, statement A is false.

Statement B is false. The square root of a number greater than 1 is less than the number itself. in fact, [tex] \sqrt{7} =2.64[/tex], whereas [tex] \sqrt{7^2} =7[/tex]. Since 2.64 is less than 7, [tex] \sqrt{7} [/tex] is less than [tex] \sqrt{7^2} [/tex]; therefore statement B is false.

Statement C is false. [tex] \sqrt{7} [/tex] is actually less than 7 divided by two, so there is no way that [tex] \sqrt{7} [/tex] is between 6 and 8. In fact [tex] \sqrt{7} =2.64[/tex]. Since 5 is greater than 2.64, [tex]( \sqrt{5} )^2[/tex] is greater than [tex] \sqrt{7} [/tex]; therefore, statement C is false.

Statement D is true. [tex] \sqrt{7} =2.64[/tex]. Since 2.64 is greater than 0.8, [tex] \sqrt{7} [/tex] is greater than [tex] \frac{4}{5} [/tex].

We can conclude that Jana should use statement D to create her list; also the correct order from least to greatest is: [tex] \frac{4}{5} [/tex], [tex] \sqrt{0.8} [/tex],[tex] \sqrt{7} [/tex], [tex]( \sqrt{5} )^2[/tex], [tex] \sqrt{7^2} [/tex]

Answer:

The Correct Would Be OPTION : D

Step-by-step explanation:

PLEASE I NEED THE HELP FAST!!!! Black 4 5 Blonde 4 6 Brown 10 8 Red 2 1 :The table shows the number of boys and girls that have black, blonde, brown, or red hair color. What portion of the boys have red hair? (round to nearest hundredth)

Answers

0.82 is the closest hundredth

24 is what percent of 40?
Show work please! Thanks

Answers

60% 

40 ÷ 10 = 4
24 ÷ 4 = 6
6 = 6/10 = 3/5 = 0.6 = 60%
60%
[tex] \frac{24}{40} \times \frac{100}{100} = \frac{60}{100} [/tex]
steps
1) find what 24 of 40 is
which is 24/40
2)multipy with denominator and numerator by 100 resulting in 60%

What are like terms? How do you combine them? Can you give an example?

Answers

like terms are when numbers with and without variables can be combined. ex: 4x+6-8x+=32
you would first combine 4x and -8x because they are the same.
Like terms are terms that have the same root and coefficient. For example, 2x and 3x both have the same variable, so you can combine them (add them). 

2x + 3x = 5x

You combine the coefficients by adding them. 2 + 3 = 5. 

Hope this helps!

What is the volume of a cylinder with a radius of 4 inches and a height of 7 inches

Answers

Cylinder
Formula = 3.14 x radius square x 7

3.14x 4x4 x7= 351.68 inches square

Answer is provided in the image attached.

Find 0.8% of 1,046 what is 0.8% of 1,046

Answers

Your correct answer should be 8.368

The required answer would be 8.368 which is 0.8 percent of 1,046.

What is the percentage?

The percentage is defined as a ratio expressed as a fraction of 100.

For instance, If Mishali obtained a score of 67% on her exam, that corresponds to 67 out of 100. It is expressed as 67/100 in fractional form and as 67:100 in ratio form.

We have to determine the evaluation of 0.8% of 1,046.

⇒ 0.8% of 1,046

0.8%  is expressed as 0.8/100 in fractional form

⇒ (0.8/100)(1,046)

0.8/100  is expressed as 0.008 in decimal form

⇒ (0.008 )(1,046)

Apply the multiplication operation, and we get

⇒ 8.368

Therefore, 0.8% of 1,046 would be 8.368.

Learn more about the percentages here:

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What is $1200 at 5.6% for 4 years

Answers


[tex]i = prt[/tex]
[tex]i = unknown[/tex]
[tex]p = 1200[/tex]
[tex]r = 5.6\% \: or \: 0.056[/tex]
[tex]t = 4[/tex]
[tex]i = 1200(0.056)4[/tex]
[tex]i = (67.2)4[/tex]
[tex]i = 268.8[/tex]
$268.80

268.80 is your answer

what is the surface area of a cube with a side length of 3 1/4 in

Answers

3 1/4 = 13/4
so
A = 6a^2
A = 6(13/4)^2
A = 6 (169/16)
A = 63.375 in^2 

Triangle ABC has angle measures as shown. (a) What is the value of x? Show your work. (b) What is the measure of angle C? Show your work.

Answers

all angles = 180 degrees
3(x-2)+35+52=180
distribute
3x-6+35+52=180
combine like terms 
3x+81=180
subtract 81 on both sides
3x=99
divide both sides by 3
x=33
plug in for x
3((33)+2)=
or 180-35-52=93

The value of x is 29.

The measure of angle C is 93.

What is a triangle?

A triangle is a 2-D figure with three sides and three angles.

The sum of the angles is 180 degrees.

We can have an obtuse triangle, an acute triangle, or a right triangle.

We have,

The sum of the angles = 180

So,

From the triangle,

3(x + 2) + 35 + 52 = 180

3x + 6 + 35 + 52 = 180

3x  + 93 = 180

3x = 180 - 93

3x = 87

x = 29

Now,

∠C = 3 (x + 2)

= 3 (29 + 2)

= 3 x 31

= 93

Thus,

The value of x is 29.

The measure of angle C is 93.

Learn more about triangles here:

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factor 2cos^2x-5cosx+2=0

Answers

[tex]TRIGONOMETRIC \: \: \: RESOLUTIONS \\ \\ \\

2 \: { \cos}^{2} \alpha \: - \: 5 \: \cos\alpha \: + \: 2 \: = \: 0 \\ \\ Let \: \: \cos \alpha \: = \: x \\ \\ Hence \: \: , \: \\ the \: given \: expression \: becomes \\ \: a \: Quadratic \: Equation\: - \\ \: \\ 2 {x}^{2 } \: - \: 5x + \: 2 \: = \: 0 \\ \\ 2 {x}^{2} \: - \: 4x \: - \: x \: + \: 2 \: = \: 0 \\ \\ 2x \: (x - 2) \: - \: 1 \: (x - 2) \: = \: 0 \\ \\ (2x - 1) \: (x - 2) \: = \: 0 \\ \\ Solving \: for \: \: x \: \: , \: \: \\ \: We \: get \: \: - \: \\ \\ \: \: x \: = \: \frac{1}{2} \: \: \: \: \: \: and \: \: \: \: \: \: \: \: x \: = \: 2 \\ \\ As \: value \: of \: \cos\alpha \: ranges \: from \: \\ \: \: - 1 \: \: \: to \: \: \: 1 \: \\ \\ Neglect \: \: x \: = \: 2 \\ \\ Hence \: , \: x \: = \: \frac{1}{2} \\ \\ \: \: \: \: \: \: \: \: \: \: \cos\alpha \: = \: \frac{1}{2} \\ \\ \\ \: \: \: || \: \: \: \alpha \: = \: \: 2n \pi \: + \: \frac{\pi}{3} \: \: \: \: or \: \: \: \: 2n \pi \: - \: \frac{\pi}{3} \: \: \: || \\ \:
\: \: \: \: \: \: \: \: \: Ans.\: \: \: \\ \\ \: \:( \: Where \: n \: represents \: any \: Integer\: ) \: \: \: \: \: [/tex]

Izracunaj opseg i povrsinu kruga upisanog u kvadrat stranice duljine 8 cm.

Answers

(In English), your question would state the following:


Calculate the circumference and circumference of the circle entered in a square 8 cm long.

So when finding the answer this this question, we know that the circumference would be the complete area of a circle.

So, I believe we would want to find what is the radius and the diameter that would make this circumference 8[tex]^c^m[/tex].

The radius would then be (1.274).
__________________________________________________________

Now in your own language (Croatian).

Dakle, kad pronađemo odgovor na ovo pitanje, znamo da bi opseg bio cjelokupno područje kruga. Dakle, vjerujem da bismo željeli otkriti što je radijus i promjer koji bi ovaj opseg mogao učiniti 8cm. Radijus bi onda bio (1.274).




The question in English is

Calculate the circumference of the circle entered in a square 8 cm long

we know that

The circumference of a circle is equal to

[tex]C=\pi D[/tex]

where

D is the diameter of the circle

In this problem we have that

the diameter of the circle is equal to the length of the square

so

[tex]D=8\ cm[/tex]

Find the circumference

[tex]C=8\pi\ cm=25.13\ cm [/tex]

therefore

the answer is

The circumference of a circle is equal to [tex]8\pi\ cm\ or\ 25.13\ cm[/tex]

one number is 9 times a first number. A third number is 100 more than the first number. Of the sum of the three numbers is 1167, find the numbers

Answers

Let x represent the first number.
The second number is 9x.
The third number is x +100.

The sum of all three numbers is
.. x +9x +(x +100) = 1167
.. 11x +100 = 1167
.. 11x = 1067
.. x = 97

The numbers are 97, 873, 197.

Divide and round to the nearest tenth 3.5 divided by 2.29

Answers

The answer will be 1.53 after dividing and rounding to the nearest tenth 3.5 divided by 2.29.

What is an arithmetic operation?

It is defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has a basic four operators that is +, -, ×, and ÷.

We have:

= 3.5/2.29

After dividing we will get:

= 1.528

Rounding to the nearest tenth:

= 1.53

Thus, the answer will be 1.53 after dividing and rounding to the nearest tenth 3.5 divided by 2.29.

Learn more about the arithmetic operation here:

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fast help plz.Brennon has a computer game that responds with either "go" or "stop" when a button is pressed. The probability that the response is "stop" is not known to game players. Brennon presses the button repeatedly and records the numbers of "stop" responses.
Number of button presses 10 50 100
Number of "stop" responses 2 18 33
Estimate P(go) using the collected data
G. 67%
O. 18%
L. 50%
D. 33%


plz help i had to write this whole thing

Answers

Hi! To estimate you just have to average the probability of the computer game responding "go" when a button is pressed. For the first one, the button responded "go" 8 out of 10 times, which gives it a probability of 80%. For the second one, the probability is 32/50 or 64%, while the third one is 67/100 or 67%.

Averaging this we'll get:
[tex] \frac{0.80+0.64+0.67}{3} =0.70[/tex]

Since we're just estimating, we can choose the value closest to 70%.

ANSWER: G. 67%

I REALY NEED HELP SO THERE ARE MANY WAYS TO FACTOR A POLYNOMIAL , SO HOW DO YOU KNOW WHICH ONE TO USE.


MY QUESTION IS WHAT IS 49X^3-28X^3 FACTORED

Answers

49x^3 - 28x^3
all you need to do is combine like terms.

Answer: 21x^3
I think your answer is 21x^3


1440 tons of grain were brought to a silo over two days. On the second day, 80% of the amount of the grain delivered during the first day was brought in. How many tons of grain were delivered to the silo on the first day?

Answers

Final answer:

To find out how many tons of grain were delivered on the first day, a simple algebraic equation was set up and solved to show that 800 tons were delivered on the first day.

Explanation:

Given that 1440 tons of grain were delivered to a silo over two days, we need to determine the amount delivered on the first day. It was stated that the second day's delivery was 80% of the first day's. Let's represent the first day's delivery as x tons. Therefore, the second day's delivery would be 0.80x tons. The sum of the two-day deliveries equals 1440 tons. This gives us the equation:

x + 0.80x = 1440

To solve this equation, we combine like terms:

1.80x = 1440

Dividing both sides by 1.80 gives us:

x = 1440 / 1.80

x = 800

Thus, 800 tons of grain were delivered on the first day.

What property is l times w = w times l

Answers

Answer:

This property is communitive

Step-by-step explanation:

Please help on #8, Due really soon!!

Answers

Answer: 72 square centimeters

-------------------------------------------------------------

Area of triangle ECD = (base)*(height)/2
Area of triangle ECD = 6*12/2
Area of triangle ECD = 72/2
Area of triangle ECD = 36 square cm

Subtract this area from the trapezoid area. This will get us the area of the parallelogram

Area of Parallelogram ABCE = (area of trapezoid ABDE) - (area of triangle ECD)
Area of Parallelogram ABCE = (180) - (36)
Area of Parallelogram ABCE = 144 square cm

The last step is to divide the area of the parallelogram in half. This is because the parallelogram is made of two congruent triangles (triangle ABE and triangle EBC). The two triangles ABE and EBC have equal areas

Area of triangle EBC = (1/2)*(area of parallelogram ABCE)
Area of triangle EBC = (1/2)*(144)
Area of triangle EBC = 72 square centimeters

Can anyone help me? Or at least explain how you solved the problem

Answers

The answer to this is 2. You can simplify it by crossing out the two 3's. Now you're left with 2/1 which is 2 in standard form.

help plz i want help

Answers

Answer A is correct
Yw and have a nice day
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