I don’t understand this, please help

The solution of expresison is, r = - 38

We have to give that,

An expression to simplify,

12r - 18 = 13r + 18

Now, We can simplify the expression as,

12r - 18 = 13r + 18

Subtract 12r on both sides,

12r - 18 - 12r = 13r - 12r + 18

- 18 = r + 18

Subtract 18 on both sides,

- 18 - 18 = r

r = - 36

Therefore, The solution is, r = - 36

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C=2 πr which is the formula for circumference

PEMDAS:

20 + [tex]4^{3}[/tex] ÷ -8

Exponent

20 + 64 ÷ -8

Divide

20 +  -8

Add

20 + -8 = 12

hope this helps :)

The value of [tex]20+4^{3} /(-8)[/tex] is 12.

Given:

[tex]20+4^{3} /(-8)[/tex]

Simplifying the equation by the PEMDAS rule

We can remember the order using PEMDAS: Parentheses, Exponents, Multiplication, and Division (from left to right), Addition, and Subtraction (from left to right).

[tex]$\quad 4=2^{2}$[/tex]

[tex]$(4)^{3}=\left(2^{2}\right)^{3}=2^{6}$[/tex]

Substituting the values in the given equation,

[tex]$20+\frac{2^{6}}{-8}$$[/tex]

Dividing exponents as

[tex]$2^{6}$[/tex] divided by [tex]$2^{3}=2^{(6-3)}=2^{3}$[/tex]

[tex]$20+-8$$[/tex]

Simplify,

[tex]$20+-8$$[/tex]

Therefore, the value of [tex]20+4^{3} /(-8)[/tex] is 12.

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Hey there!!

Simple equation :

mᵃ × mᵇ = m ᵃ⁺ᵇ

We have :

5⁻⁷ * 5¹² * 5⁻²

... 5⁻⁷⁺¹²⁻²

... 5¹²⁻⁹

... 5³

... 125

Hope my answer helps!!

the photo takes up 2/8 of the page

-3x = -15      divide both sides by (-3)

-3x:(-3)=-15:(-3)

x = 5

Answer:

The answer is b, 5

Step-by-step explanation:

-3x = -15

(it sometimes helps to flip it, so that's what I'm going to do here to help it to make more sense)

x(-3) = -15

x(-3) devided by (-3) = -15 devided by (-3)

when you devide a negitive by a negative the answer will be positive

the absolute value of 15 devided by three is 5

your answer is a positive five, or just 5

Answer:

The rate of change is of 0.25 lbs / person

Step-by-step explanation:

According to my research the formula for the Rate of Change is the following

[tex]\frac{y2 - y1}{x2 - x1}[/tex]

In this situation we can use y for lbs and x for people. Since all the information was given to us in the question we can just plug the values into the formula above and solve for the rate of change.

[tex]\frac{17lbs-9lbs}{68-36} = \frac{8lbs}{32people} = 0.25lbs/person[/tex]

So we can see that the rate of change is of 0.25 lbs / person

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

The number of girls who work there are:

                              92

It is given that:

The number of girls who work at Super shopper is 2 more than 3 times the number of boys.

This means that:

If the number of boys= x

Then the number of girls= 3x+2

If 30 boys work at super shopper.

i.e. x=30

Then 3x+2=92

Hence, the number of girls who work there are: 92

The Answer to this is: True.

Answer:

The least value of n is, 9.

Step-by-step explanation:

Let n be the number of sheep in Integer.

Mary(M) owned the number of sheep is n i.e, M = n sheep

Sam(S) had exactly four times as many sheep as Mary , i.e, S = 4 n sheep

As per the given condition Mary buys 17 extra sheep

Now, Mary has total number of sheep, M = n +17 sheep

And Sam sells 8 of his sheep that means he has now,

[tex]S = 4n -8[/tex]

But, Sam still has more sheep than Mary i.e,  [tex]4n-8 > n+17[/tex]

Solve an inequality: [tex]4n-8 > n+17[/tex]

Add 8 both sides we get;

[tex]4n-8+8>n+17+8[/tex]

Simplify:

[tex]4n>n+25[/tex]

Now, subtract n from both the side, we get;

[tex]4n -n>n+25-n[/tex]

Simplify:

[tex]3n>25[/tex] or [tex]n>\frac{25}{3}=8.33333333[/tex]

Since n is the number of sheep in integer,

then the least value of n is, 9.  

Let the angles are x, y and z.

Let the smallest angle is x

one angle is 78 degrees more than the smallest angle.⇒ y = x + 78 → (1)

the third angle is 4 times as large as the smallest angle. ⇒ z = 4 x → (2)

we should know that the sum of the angles of the triangle = 180°

∴ x + y + z = 180 →(3)

substitute from (1) and (2) at (3)

∴ x + ( x +78) + (4x) = 180

∴ 6x = 180 - 78 = 102

∴ x = 102 ÷ 6 = 17°

∴ y = 17 + 78 = 95°

∴ z = 4x = 68°

So, the measures of all three angles are 17°, 95° and 68°

It is true in this case, because you are trying to find the distance between two points. That also means you are trying to find the difference between two points, and to find the difference, you subtract. That is why what Brittany says is true.

Absolute value is always positive because absolute value represent distance and distance can not be negative.

Yes it is true, To determine the distance between 180 and 34, you can just subtract 180 - 34.

Since, absolute value is represent distance between two points

and absolute value is always greater or equal to zero.

Now, To  determine the distance between 180 and 34,  just subtract 180 - 34.

and then take absolute value.

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QUESTION 1

The volume of a cone is given by;

[tex]V=\frac{\pi r^2h}{3}[/tex]

From the given information,

[tex]r=12,h=6[/tex]

[tex]V=\frac{12^2\times 6}{3}\pi[/tex]

[tex]V=\frac{144 \times 6}{3}\pi[/tex]

[tex]V=288\pi[/tex]

QUESTION 2

The volume of a sphere is given by

[tex]V=\frac{4\pi r^3}{3}[/tex]

From the given information.\

[tex]r=\frac{Diameter}{2}= \frac{12}{2}=6[/tex]

Therefore the volume of the sphere is

[tex]V=\frac{4\times6^3}{3} \pi[/tex]

[tex]V=\frac{4\times216}{3} \pi[/tex]

[tex]V=288\pi[/tex]

QUESTION 3

The volume of a sphere is given by

[tex]V=\frac{4\pi r^3}{3}[/tex]

From the given information.\

[tex]r=9[/tex]

Therefore the volume of the sphere is

[tex]V=\frac{4\times 9^3}{3} \pi[/tex]

[tex]V=\frac{4\times 729}{3} \pi[/tex]

[tex]V=972\pi[/tex]

QUESTION 4

The volume of a cylinder is given by

[tex]V=\pi r^2 h[/tex]

From the given information,

[tex]r=\frac{Diameter}{2}= \frac{12}{2}=6[/tex]

and

[tex]h=27[/tex]

Therefore volume of the cylinder

[tex]V=6^2 \times 27 \pi[/tex]

[tex]V=36 \times 27 \pi[/tex]

[tex]V=972\pi[/tex]

QUESTION 5

The volume of a cylinder is given by

[tex]V=\pi r^2 h[/tex]

From the given information,

[tex]r=\frac{Diameter}{2}= \frac{8}{2}=4[/tex]

and

[tex]h=18[/tex]

Therefore volume of the cylinder

[tex]V=4^2 \times 18 \pi[/tex]

[tex]V=16 \times 18 \pi[/tex]

[tex]V=288\pi[/tex]

QUESTION 6

The volume of a cone is given by;

[tex]V=\frac{\pi r^2h}{3}[/tex]

From the given information,

[tex]r=\frac{18}{2}=9,h=36[/tex]

[tex]V=\frac{9^2\times 36}{3}\pi[/tex]

[tex]V=\frac{81 \times 36}{3}\pi[/tex]

[tex]V=972\pi[/tex]

Volume of a cone = [tex]\pi r^2\frac{h}{3}[/tex]

Volume of a sphere = [tex]\frac{4}{3} \pi r^3[/tex]

Volume of a cylinder = [tex]\pi r^2h[/tex]

With the help of these formulas, we can calculate the volumes.

A cone with a radius of 12 units and a height of 6 units = [tex]\pi 12^2\frac{6}{3}[/tex] = 288[tex]\pi[/tex]

A sphere with a diameter of 12 units = [tex]\frac{4}{3} \pi 6^3[/tex] = 288[tex]\pi[/tex]

A sphere with a radius of 9 units = [tex]\frac{4}{3} \pi 9^3[/tex] = 972[tex]\pi[/tex]

A cylinder with a diameter of 12 units and a height of 27 units = [tex]\pi 6^227[/tex] = 972[tex]\pi[/tex]

A cylinder with a diameter of 8 units and a height of 18 units = [tex]\pi 4^218[/tex] = 288[tex]\pi[/tex]

A cone with a diameter of 18 units and a height of 36 units = [tex]\pi 9^2\frac{36}{3}[/tex] = 972[tex]\pi[/tex]

negative

Let's find the slope of our line using the slope formula:

[tex]m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]

where

[tex]m[/tex] is the slope of the line

[tex](x_{1},y_{1})[/tex] are the coordinates of the first point on the line

[tex](x_{2},y_{2})[/tex] are the coordinates of the second point

From the graph we can get the points (-2, 1) and (2, -1), so [tex]x_{1}=-2[/tex], [tex]y_{1}=1[/tex], [tex]x_{2}=2[/tex], and [tex]y_{2}=-1[/tex]. Let's replace the values in our formula to find [tex]m[/tex]:

[tex]m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]

[tex]m=\frac{-1-1}{2-(-2)}[/tex]

[tex]m=\frac{-2}{2+2}[/tex]

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

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

[tex]m=-\frac{1}{2}[/tex]

The slope of the graph of the linear function is [tex]-\frac{1}{2}[/tex]; since [tex]-\frac{1}{2}[/tex] is a negative number, the slope of the graph is negative.

Answer:

The answer to your question would be Area = 280.13

Step-by-step explanation:

Area of the circle without the square: 380.13

Area of the square: 100

380.13 - 100 = 280.13

We label each equation

3x + 4y = 5 (1)

2x – 3y = 9 (2)

We now want to get rid of one of the variables (x or y). Lets get rid of x:

We need (1) and (2) to have the same number of x's so we multiple (1) by 2 and (2) by 3 so they both have 6 x's

6x + 8y = 10 (1)*2

6x - 9y = 27 (2)*3

Now to get rid of the x's we take one of the equations from the other. It is easier to do (2)*3 -(1)*2

 6x - 9y = 27 (2)*3

6x + 8y = 10 (1)*2

    -17y = 17  

If we devide this equation by -17 we get

y = -1

We can plug this value of y into (1) to get

3x -4 = 5

add 4 to both sides of the equation

3x = 9

Divide by 3

x = 3

Now to check put x and y into (2)

6 - (-3) = 9  

As this is true, we have the solution

x = 3, y = -1

a. The independent variable is r. The dependent variable is m.

b. The domain is the set of numbers used in the independent variable. You can rent 0 videos, or 1 video, or 2 videos, etc., up to the amount of money you have. If you rent 0 videos, you are left with m = 30 - 3r = 30 - 3(0) = 30 - 0 = 30 dollars. If you rent 10 videos, you will have m = 30 - 3(10) = 30 - 30 = 0 dollars left. The domain is {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}. The range is {0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30}. Both the domain and range are discrete.

c. I can't do it online.

Answer:

b and c

Step-by-step explanation:

Jack popped some popcorn, but 3 of the 150 did not pop.

the ratio of the jack's popcorn = [tex]\frac{3}{150}[/tex]

                                                   = [tex]\frac{1}{50}[/tex]

                                                  = 1 : 50

We will go through all the other given ratio to find whether they are same ratio of Jack's or not.

a. 2 unpopped out of 75 kernels  = [tex]\frac{2}{75}[/tex]

                                                       = 2 : 75  This is not a match

b. 2 unpopped out of 200 kernels = [tex]\frac{4}{200}[/tex]

                                                         = [tex]\frac{1}{50}[/tex]

                                                         = 1 : 50   This is same

c. 1 unpopped out of 50 kernels = [tex]\frac{1}{50}[/tex]

                                                     = 1 : 50 This is also same

So b and c has the same ratio of unpopped to total kernels as Jack's popcorn.

a.   995 lb. 6 oz.

+  1,004 lb. 11 oz.

______________

  1999 lb  17 oz  =  2000 lb 1 oz.

16 oz = 1 lb

Therefore,  

1999 lb  17 oz = 1999 lb + 16 oz + 1 oz = 1999 lb + 1 lb + 1 oz

b. 24 T 1,507 lb 12 oz.

   + 7 T 938  lb  6 oz.

      ______________

      31 T  2445 lb  18 oz

2000 lb = 1 T.

16 oz = 1 lb

Therefore,

31 T  2445 lb  18 oz = 31 T + 2000 lb + 445 lb + 16 oz + 2 oz

                                 = 31 T + 1 T + 445 lb + 1 lb + 2 oz

c.     6 T.                 14 oz.  

   +  11 T. 1,949 lb.

   +                          8 oz.

   +   5 T. 49 lb.      15 oz.

______________________

     22T.  1998 lb.   37 oz.

     22T.  1998 lb.   37 oz. = 22 T + 1998 lb + 16oz + 16 oz + 5 oz.

                                          = 22 T + 1998 lb + 1 lb + 1 lb + 5 oz.

                                          = 22 T + 2000 lb + 5oz

                                           = 22 T + 1 T + 5 oz.

Answer:

A. 2000 pounds 1 ounce

B. 32T 446 pounds 2 ounces

C. 23T 5 ounces

Step-by-step explanation:

Answer: B: symmetric property

Reflexive property  states that for every real number x, x = x.

symmetric property states that for all real numbers x and y, if x = y then y = x.

associative property states that you can add or multiply regardless of how the numbers are grouped. =(like adding/multiplying like terms.

Transitive property states that for all real numbers x,y, and z, if x = y and y = z then x = z.

The equation -1/4 = -0.25 then -0.25 = -1/4 demonstrates the Symmetric Property of equality, which means order does not matter in an equation for it to be true.

The equation you provided, -1/4 = -0.25 then -0.25 = -1/4, demonstrates the Symmetric Property of equality.

This property essentially says if a = b, then b = a. It shows that order does not matter in an equation; the elements can be flip-flopped, and the equality will still hold true. In your case, -1/4 = -0.25, and if you switch the order, -0.25 = -1/4, the equation still stays true. That's why we say it shows the symmetric property.

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Yes. I take algebra 1 honors

(2,3)

(x,y)

x=2

y=3

This is because both lines meet at this direct point on the graph.

Answer:

Yes, the lines will intersect because the slopes are different. Also, both lines have a y-intercept of -7, so they both include the point (0, –7).

Step-by-step explanation:

Answer:

990 pounds

Step-by-step explanation:

If one troop eats 11 pounds and there are 90 troops, you only need to multiply 90 by 11.

$920 is left

$1,000/.08=$80

$1,000-$80=$920

9 goes into 260, 28.8 repeating times. hope this helps!

28.8 is your answer.

ANSWER

[tex]x>2[/tex]

EXPLANATION

We have the inequality

[tex]8(\frac{x}{4})>4[/tex]

We can cancel directly to get;

[tex]2(\frac{x}{1})>4[/tex]

[tex]\Rightarrow 2x>4[/tex]

We now divide both sides by 2,

[tex]\Rightarrow x>\frac{4}{2}[/tex]

[tex]x>2[/tex]

See graph in attachment