7th grade math help I don't get this :(

Answer:

Yard, foot, inch

Answer:

metres

Step-by-step explanation:

length is distance from one point to another an according to the standard units which are the same all along the world the length should be measured in metres

Answer:

The cost can be written as:

C(x) = $1.4*x

The revenue can be written as:

R(x) = $700 - $400*e^(-x/100)

And as you know, the profit is written as the difference between the revenue and the cost:

P(x) = R(x) - C(x)

P(x) =  $700 - $400*e^(-x/100) - $1.4*x

Now we want to maximize this, then we must look at the zeros in the derivate of P(x)

dP/dx = P'(x) = (-1/100)*$400*e^(-x/100) - $1.4

The maximum will be when P'(x) = 0.

we can solve:

0 = (-1/100)*$400*e^(-x/100) - $1.4

$1.4 = (-1/100)*$400*e^(-x/100)

(-100)*$1.4 = $400*e^(-x/100)

$140 = $400*e^(-x/100)

($140/$400) = e^(-x/100)

0.35 = e^(-x/100)

Now we can apply the Ln() in both sides and get:

ln(0.35) = ln(e^(-x/100) ) = -x/100

-ln(0.35)*100 = x = 104.98

You should apply 104.90 pounds of fertilizer.

b) The profit per acre, is:

P(x) = $700 - $400*e^(-x/100) - $1.4*x

Then if you have 200 acres, the profit will be:

200*P(x) = 200*($700 - $400*e^(-x/100) - $1.4*x)

and the maximum profit is whit x = 104.98 pounds, then:

200*P(104.98) = 200*($700 - $400*e^(-104.98/100) - $1.4*104.98) = $82,604.98

Answer:

a number divided by x so 2/x 3/x 4/x 5/x

Step-by-step explanation:

Answer:

Its 9^-9

Step-by-step explanation

Because 9^-3 is on top, you have to take it to the bottom - this makes it positive. Now you have 1/(9^3*9^6). This give you 1/9^9 - or in other words 9^-9

Answer:

76

Step-by-step explanation:

Answer:

line 3 and 4 I believe

Step-by-step explanation:

Look at the bootom numbers. Look at the one and follow it up, the only lines that are not over two and are still above one are lines 3 and 4.

Answer:

Lines 3 and 4

Step-by-step explanation:

A slope is rise over run. So you have to determine how many you rise (go up) and run (go over). This is represented in a fraction form (such as 1/2 is up 1 and over 2). A slope greater than one would be 1/1 (go up more than one and over more than 1), and less than two (go up less than 2 and over less than 1).

Line 1 goes up 3 and over 1 (3/1 = a slope of 3)

Line 2 goes up 2 and over 1 (2/1= a slope of 2)

Line 3 goes up 3 and over 2 (3/2 = a slope of 1.5 )

Line 4 goes up slightly more than 1 and slight over 1

Line 5 goes up 1 and over 1 (1/1 = a slope of 1)

Answer:

22

Step-by-step explanation:

we plug -6 to x which would get us -3(-6) + 4

-3(-6) = 18 + 4 = 22

PLZ mark brainliest :DD

Answer:

22

Step-by-step explanation:

1. -3 times -6 would be +18.

2. 18+4=22

Answer:

y = 2x + 5; substitute 5 for x

Answer:

Answer Choice D. He will make 10 bracelets in 5 hours (for the other question).

Step-by-step explanation:

He makes 2 braclets and hour so the slope is 2. He already has 5 bracelets so the y-intercept is 5.

Answer:

∆STR~∆RTQ is correct I am pretty sure

Answer:

Option four

Str ~ rtq

Step-by-step explanation:

Answer:

A

Step-by-step explanation:

Price per ticket

Answer:

the diagonal of the rectangle is 5

Step-by-step explanation:

[tex]c=\sqrt{a^{2} +b^{2} }[/tex]

[tex]c=\sqrt{3^{2} +4^{2} }[/tex]

[tex]c=\sqrt{9+16}[/tex]

[tex]c=\sqrt{25}[/tex]

[tex]c=5[/tex]

Answer: The percent of books did Johnny read that were for social studies=10%

Step-by-step explanation:

Given: Total books he read -= 20

Number of books for social studies = 2

The percent of books did Johnny read that were for social studies

[tex]=\dfrac{\text{Number of social studies books}}{\text{Total books}}\times100\\\\=\dfrac{2}{20}\times100\%\\\\=\dfrac{100}{10}\%=10\%[/tex]

Hence, the percent of books did Johnny read that were for social studies=10%

Answer:

$1,025

Step-by-step explanation:

(205000)(.015)/3  =  1025

James will receive or earn $1,025

Answer:

when you will give us 100 points we will be giving your answers okay dear

Answer:

481

Step-by-step explanation:

Answer:

2 - (-6) = 8

-8 - (-5) = -3

It's simple math.

Answer: J (y=3x-2)

Step-by-step explanation: In perpendicular equations, opposite reciprocals are required. This means that a slope of 3 is perpendicular to -1/3, thusly J is corret

Answer:

y = 1/2

Step-by-step explanation:

I hope this helps you with the question

Answer:

485.1

Step-by-step explanation:

           6 . 3

x       7 7    

+       4 4 . 1

+    4 4 1 . 0

     4 8 5 . 1

basically break up 77 to 70 + 7

multiply 6.3 with both parts of the 77 (70 + 7):

70 x 6.3 = 441

 7 x 6.3 = 44.1

then add those two sums together to get 485.1

3 and 4. 3^2=9 and 4^2=16. 13 is between the two.

Answer:

Answer:8x3=24

Step-by-step explanation:

8 across the x axis and

3 across the y axis

8x3=24

Answer:

Ethical monotheism is a form of exclusive monotheism in which God is the source for one standard of morality, who guides humanity through ethical principles.

Step-by-step explanation:

Answer:

3x^2-8x+9

Step-by-step explanation:

11x2+9−2x−8x2−6x

Subtract 8x2 from 11x2.

3x2+9−2x−6x

Subtract 6x from −2x.

3x2+9−8x

Move 9.

3x^2−8x+9

Hope this helps! :) Plz mark as brainliest

11x2+9−2x−8x2−6x

Subtract 8x2 from 11x2.

3x2+9−2x−6x

Subtract 6x from −2x.

3x2+9−8x

Move 9.

3x^2−8x+9

Answer c

Step-by-step explanation: i took the test and got them all right

Answer:

-8

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

This follows PEMDAS

This first thing to do is add 8, so this must be P aka parentheses.

A and B are eliminated

Next is to M aka mutiply by 1/2

This eliminates C because if -6 was in the parentheses this would mean it is the next step as () takes priority. And this is not the case

I hope Im correct!

Answer:

they sold about 199 hamburgers

Step-by-step explanation:

Answer:

27 calories per ounce

Step-by-step explanation:

just divide 135 by 5

Answer:

x < 0

Step-by-step explanation:

Answer:

  x < 0

Step-by-step explanation:

2(x + 1) + 4 < - 2x + 6

2x + 2 + 4 < -2x + 6

2x + 6 < -2x + 6

4x + 6 < 6

4x < 0

x < 0