Lamar has a list of 600 pages to read to finish his book for his upcoming book report. He sets a goal to read half of the pages left in his book each day.

Answer:

n=7

Step-by-step explanation:

6(n-3) - 2n=10

Distribute

6n - 18 -2n = 10

Combine like terms

4n -18 = 10

Add 18 to each side

4n-18+18 = 10+18

4n = 28

Divide by 4

4n/4 = 28/4

n = 7

Answer:

cos A = 12/13 = 0.9231

(angle A = 22.62°)

Step-by-step explanation:

cos A = 12/13 = 0.9231

ANSWER=

cos A = 12/13 = 0.9231

(angle A = 22.62°)

EXPLANTION=

cos A = 12/13 = 0.9231

Answer:

(0,0)

Step-by-step explanation:

The midpoint is (0,0) because as you can see in the graph the middle would be (0,0). However, if point A moved even one step further or closer the midpoint will also shift

Answer:

x + 6 y - 4

Step-by-step explanation:

A moved 6 units to the right so plus 6 then moved 4 units down so minus 4

Answer:

Lena famous or sum y she getting sm calls?!

Step-by-step explanation:

Answer:

the solution is (2, 3)

Step-by-step explanation:

Make this work easier by reducing the second equation:

-x + y = 1, or y = x + 1

Substititing x + 1 for y in the first equation, we get:

x + 1 = -5x + 13, or (after combining like terms):

6x = 12

Then x = 2, and bercause y = x + 1 (see above), y = 2 + 1 = 3

Then the solution is (2, 3)

Answer:

N = -8

Hope this helps!

Mark me brainliest if I'm right :)

Answer:

y = -2/5 x + 4

Answer:

See explanation for answer.

Step-by-step explanation:

Slop intercept formula:  y = mx + b

Slope of this graph: 4

I hope this helps!

Have a lovely day!

Answer: The Answer is D.) 16/25

Step-by-step explanation: I got it correct on Study Island

C. 700 units.

The formula for the surface area of a rectangular prism is: 2 ((Width × Length) + (Height × Length) + (Height × Width))

(14 × 12) + (7 × 12) + (7 × 14)

168 + 84 + 98 = 350

Now do 350 × 2 = 700

700 units squared.

Answer:

x=-4 , x=3

Step-by-step explanation:

just did it on math-ways

Answer:

52.708

Explanation:

It's 708 instead of 78 even rounded 52.708 would be more.

Answer:

52.708 is greater then 52.078

Step-by-step explanation:

Thats the answer!! Hope I could help u!! :)

Answer:

[tex] \frac{1}{ \frac{ - 3}{ {6}^{x} } } \\ = 1 \times \frac{ {6}^{x} }{ - 3} \\ = - \frac{ {6}^{x} }{3} [/tex]

Answer:

17/29 or 58.6%

Step-by-step explanation:

P(G or R) = 8/29 + 9/29 = 17/29

surface area= perimeter x height + 2b

s= pxh+2b

example: 18(8)+2(12)

explain:  18 is the perimeter and 8 is the height then you have to add the base times 2

Answer:

the answer is 23.........

Answer: (2,4)

Step-by-step explanation: The coordinates are 2,4

Answer:

Step-by-step explanation:

Given

We see that:

This is a vertical stretch by a factor of 3 and translation down 2 units

Correct choice is D

Answer:

10 x² - 4x

Step-by-step explanation:

Area trapezoid = 1/2 ( (b1+b1)h)

1/2( 2x * 10x - 4)

1/2(20x² - 8x)

10x² - 4x

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

Step-by-step explanation:

R' = (-2,0)

E' = (-2,2)

F' = (4,4)

Answer:

Your answer is 346.36059

Step-by-step explanation:

A = pi*r²

A = pi * 10.5²

A = pi * 110.25

A = 346.36059

We can write the the area of the circle as 110.25π square centimeter.

Area is a collection of two - dimensional points enclosed by a single dimensional line. Mathematically, we can write -

V = ∫∫F(x, y) dx dy

Given is a circle whose diameter is 21 cm​.

It is asked to find the area of a circle whose diameter is 21 cm​.

It is given that the diameter of the circle is -

d = 21 cm

r = d/2 = 21/2

r = 10.5 cm

We know that the area of the circle as -

Area = πr²

Area = π x 10.5 x 10.5

Area = 110.25π

So, it can be concluded that the area of the circle is 110.25π square centimeter.

Therefore, we can write the the area of the circle as 110.25π square centimeter.

To solve more questions on areas, visit the link-

https://brainly.com/question/29213222

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Answer:

90 fish have spots

Step-by-step explanation:

cross multiply and divide:

3 x 300 = 900

900 ÷ 10 = 90

Answer:90

Step-by-step explanation:

3/10 = x/300

cross multiply

10x= 900

divide by 10

x= 90

Answer:

61

Step-by-step explanation:

Answer:

Step-by-step explanation:

12)

we are told that ∠ABD = 61°

then we also know that ∠ADB = 61° b/c there are the equal legs of an isosceles triangle.

and we know by inspection that the ΔBCD is identical to ΔABD so it also has 61° angles so

∠ABC = 61 + 61 =122°

:)

Answer:

(-5,-6)

Step-by-step explanation:

smart

Answer:

x = 8

x = 1

Step-by-step explanation:

STEP 1:

Equation at the end of step 1

 (22x2 -  36x) +  32  = 0

STEP 2:

STEP 3: Pulling out like terms

3.1     Pull out like factors :

  4x2 - 36x + 32  =   4 • (x2 - 9x + 8)

Trying to factor by splitting the middle term

3.2     Factoring  x2 - 9x + 8

The first term is,  x2  its coefficient is  1 .

The middle term is,  -9x  its coefficient is  -9 .

The last term, "the constant", is  +8

Step-1 : Multiply the coefficient of the first term by the constant   1 • 8 = 8

Step-2 : Find two factors of  8  whose sum equals the coefficient of the middle term, which is   -9 .

     -8    +    -1    =    -9    That's it

Step-3 : Rewrite the polynomial splitting the middle term using the two factors found in step 2 above,  -8  and  -1

                    x2 - 8x - 1x - 8

Step-4 : Add up the first 2 terms, pulling out like factors :

                   x • (x-8)

             Add up the last 2 terms, pulling out common factors :

                    1 • (x-8)

Step-5 : Add up the four terms of step 4 :

                   (x-1)  •  (x-8)

            Which is the desired factorization

Equation at the end of step

3

:

 4 • (x - 1) • (x - 8)  = 0

STEP

4

:

Theory - Roots of a product

4.1    A product of several terms equals zero.

When a product of two or more terms equals zero, then at least one of the terms must be zero.

We shall now solve each term = 0 separately

In other words, we are going to solve as many equations as there are terms in the product

Any solution of term = 0 solves product = 0 as well.

Equations which are never true:

4.2      Solve :    4   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation:

4.3      Solve  :    x-1 = 0

Add  1  to both sides of the equation :

                     x = 1

Solving a Single Variable Equation:

4.4      Solve  :    x-8 = 0

Add  8  to both sides of the equation :

                     x = 8

Supplement : Solving Quadratic Equation Directly

Solving    x2-9x+8  = 0   directly

Earlier we factored this polynomial by splitting the middle term. let us now solve the equation by Completing The Square and by using the Quadratic Formula

Parabola, Finding the Vertex:

5.1      Find the Vertex of   y = x2-9x+8

Parabolas have a highest or a lowest point called the Vertex .   Our parabola opens up and accordingly has a lowest point (AKA absolute minimum) .   We know this even before plotting  "y"  because the coefficient of the first term, 1 , is positive (greater than zero).

For any parabola,Ax2+Bx+C,the  x -coordinate of the vertex is given by  -B/(2A) . In our case the  x  coordinate is   4.5000  

Plugging into the parabola formula   4.5000  for  x  we can calculate the  y -coordinate :

 y = 1.0 * 4.50 * 4.50 - 9.0 * 4.50 + 8.0

or   y = -12.250

Parabola, Graphing Vertex and X-Intercepts :

Root plot for :  y = x2-9x+8

Axis of Symmetry (dashed)  {x}={ 4.50}

Vertex at  {x,y} = { 4.50,-12.25}

x -Intercepts (Roots) :

Root 1 at  {x,y} = { 1.00, 0.00}

Root 2 at  {x,y} = { 8.00, 0.00}

Solve Quadratic Equation by Completing The Square

5.2     Solving   x2-9x+8 = 0 by Completing The Square .

Subtract  8  from both side of the equation :

  x2-9x = -8

Now the clever bit: Take the coefficient of  x , which is  9 , divide by two, giving  9/2 , and finally square it giving  81/4

Add  81/4  to both sides of the equation :

 On the right hand side we have :

  -8  +  81/4    or,  (-8/1)+(81/4)

 The common denominator of the two fractions is  4   Adding  (-32/4)+(81/4)  gives  49/4

 So adding to both sides we finally get :

  x2-9x+(81/4) = 49/4

Adding  81/4  has completed the left hand side into a perfect square :

  x2-9x+(81/4)  =

  (x-(9/2)) • (x-(9/2))  =

 (x-(9/2))2

Things which are equal to the same thing are also equal to one another. Since

  x2-9x+(81/4) = 49/4 and

  x2-9x+(81/4) = (x-(9/2))2

then, according to the law of transitivity,

  (x-(9/2))2 = 49/4

We'll refer to this Equation as  Eq. #5.2.1  

The Square Root Principle says that When two things are equal, their square roots are equal.

Note that the square root of

  (x-(9/2))2   is

  (x-(9/2))2/2 =

 (x-(9/2))1 =

  x-(9/2)

Now, applying the Square Root Principle to  Eq. #5.2.1  we get:

  x-(9/2) = √ 49/4

Add  9/2  to both sides to obtain:

  x = 9/2 + √ 49/4

Since a square root has two values, one positive and the other negative

  x2 - 9x + 8 = 0

  has two solutions:

 x = 9/2 + √ 49/4

  or

 x = 9/2 - √ 49/4

Note that  √ 49/4 can be written as

 √ 49  / √ 4   which is 7 / 2

Solve Quadratic Equation using the Quadratic Formula

5.3     Solving    x2-9x+8 = 0 by the Quadratic Formula .

According to the Quadratic Formula,  x  , the solution for   Ax2+Bx+C  = 0  , where  A, B  and  C  are numbers, often called coefficients, is given by :

           - B  ±  √ B2-4AC

 x =   ————————

                     2A

 In our case,  A   =     1

                     B   =    -9

                     C   =   8

Accordingly,  B2  -  4AC   =

                    81 - 32 =

                    49

Applying the quadratic formula :

              9 ± √ 49

  x  =    —————

                   2

Can  √ 49 be simplified ?

Yes!   The prime factorization of  49   is

  7•7

To be able to remove something from under the radical, there have to be  2  instances of it (because we are taking a square i.e. second root).

√ 49   =  √ 7•7   =

               ±  7 • √ 1   =

               ±  7

So now we are looking at:

          x  =  ( 9 ± 7) / 2

Two real solutions:

x =(9+√49)/2=(9+7)/2= 8.000

or:

x =(9-√49)/2=(9-7)/2= 1.000

Two solutions were found :

x = 8

x = 1

Answer:

D.

Step-by-step explanation: