Brianna is twice as old as James . David is four times as old as James. Brianna is 20 years younger than David. How old is David?

Answer:

-7

Step-by-step explanation:

Lets count back.

1,0,-1,-2,-3,-4,-5,-6

We are going back, so -7

Answer:x^2+2x+3

Step-by-step explanation:

I’m assuming you meant 2x^4+4x^3+6x^2...

So you can pull out 2x^2 from all of the polynomials...

And this equation isn’t able to be simplified anymore. Hope this helps!

The polynomial 2x^4 + 4x^3 + 6x^2 is factored by first finding the GCF 2x^2, resulting in 2x^2(x^2 + 2x + 3). The quadratic inside the parentheses cannot be factored further with real coefficients.

To factor the polynomial 2x^4 + 4x^3 + 6x^2, we first look for the greatest common factor (GCF) that can be factored out. In this case, each term has at least a factor of 2 and an x^2. Factoring out the GCF, we get:

2x^2(x^2 + 2x + 3)

Now, we look at the quadratic inside the parentheses to see if it can be factored further. However, the quadratic x^2 + 2x + 3 does not factor neatly over the integers because the discriminant, b^2 - 4ac, is negative (2^2 - 4(1)(3) = 4 - 12 = -8). Since we are only looking for real coefficients and not complex ones, we conclude that the quadratic cannot be factored further, and so the polynomial is fully factored as 2x^2(x^2 + 2x + 3).

Step-by-step explanation:

To prove that two sides are parallel on a graph, we must show that their slopes are the same. Plotting this on Desmos, we get the first image attached.  Finding the slopes of each line, we get

[tex]TOP\\\frac{5-3}{6-1} =2/5\\BOTTOM\\\frac{-1-(-1)}{7-2} =2/5\\RIGHT\\-4\\LEFT\\-4[/tex]

As the top slope is the same as the bottom, and the right is the same as the left, this is a parallelogram.

To prove that two sides are congruent, we must find their lengths. The distance formula is

[tex]\sqrt(x_{1}+x_{2})^2+(y_{1}+y_{2})^2 } \\[/tex]

Finding the distances, we get

TOP: [tex]\sqrt{29}[/tex]

BOTTOM: [tex]\sqrt{29}[/tex]

RIGHT:[tex]\sqrt{17}[/tex]

LEFT:[tex]\sqrt{17}[/tex]

As the lengths are the same, the sides are congruent

Answer:

R(p) = -6p^2 + 60p....

Step-by-step explanation:

Revenue, R = quantity sold * price

Price = p

Quantity sold = q = -6p + 60

R(p) = q*p

where q=-6p + 60

= (-6p + 60) * p = -6p^2 + 60p

Answer: R(p) = -6p^2 + 60p....

Answer:

2[tex]w^{3}[/tex]-6[tex]w^{2}[/tex]+4w=240

Step-by-step explanation:

The length and height are given in terms of the width. Width =w; Length =(2w−4); Height =(w−1); and the Volume is equal to the product of the three. Therefore, we can set up the equation as follows:

w×(2w−4)×(w−1)=240

To finish, we distribute and combine like terms:

(2[tex]w^{2}[/tex]−4w)×(w−1)=240

2[tex]w^{3}[/tex]−2[tex]w^{2}[/tex]−4[tex]w^{2}[/tex]+4w=240

2[tex]w^{2}[/tex]−6[tex]w^{2}[/tex]+4w=240

Therefore, 2[tex]w^{3}[/tex]−6[tex]w^{2}[/tex]+4w=240 is our equation for the dimensions of the dumpster in terms of w.

To find the dimensions of the dumpster given its volume and relationships between dimensions, we express the length and height in terms of the width and substitute these into the volume equation to get 240 = (2W - 4)(W)(W - 1).

The student has been given a problem involving the volume of a rectangular prism, representative of a dumpster, which mathematically belongs to the subject of geometry. The volume is given as 240 cubic feet, and the relationships between the dimensions (length, width, and height) are provided. The length L is described as 4 feet less than twice the width W, and the height H is 1 foot less than the width (W). We can express this information in terms of equations:

L = 2W - 4

H = W - 1

The volume V of a rectangular prism is found using the formula V = LWH. Substituting the given expressions in terms of W into the volume equation, we get:

V = (2W - 4)(W)(W - 1)

Since the volume is given as 240 cubic feet, we can write the equation as:

240 = (2W - 4)(W)(W - 1)

This is the equation in terms of the width W that could be used to find the dimensions of the dumpster.

Answer:

the answer is A. f(x +1) = -2f(x)

Step-by-step explanation:

every new number in the sequence is multiplied by -2, making it -2f(x).

Answer:

(D) f(x+1)=2f(x)

Step-by-step explanation:

Answer:

(0,7)

Step-by-step explanation:

This equation you are given is in slope-intercept form, the form y=mx+b.

It is called slope-intercept from because it gives us the slope and the y-intercept.

The slope is m.

The y-intercept is b.

If we compare y=8x+7 to y=mx+b, we should make the conclusion that m=8 and b=7.

This tells the slope is 8 while the y-intercept is 7.

The y-intercept is 7 is sometimes required to be represented by a point.  Since it is the y-intercept, the x is 0 so the point that represents the y-intercept is (0,7).

Answer:

0,7

Step-by-step explanation:

Answer:

- 24x + 9

Step-by-step explanation:

Differentiate each term using the power rule

[tex]\frac{d}{dx}[/tex] ( a[tex]x^{n}[/tex] ) = na[tex]x^{n-1}[/tex]

Given

f(x) = - 12x² + 9x, then

f'(x) = (2 × - 12)x + (9 × 1) [tex]x^{0}[/tex]= - 24x + 9

Answer:

Your slope of the line is -3/10.

Step-by-step explanation:

Use the following equation:

m (slope) = (y₂ - y₁)/(x₂ - x₁)

Let:

(x₁ , y₁) = (-2 , 7)

(x₂ , y₂) = (18 , 1)

Plug in the corresponding numbers to the corresponding variables:

m = (1 - 7)/(18 - (-2))

Simplify. First solve the parenthesis, then divide:

m = (-6)/(18 + 2)

m = -6/20

Simplify.

m = (-6/20)/(2/2) = -3/10

Your slope of the line is -3/10.

~

Answer:

[tex]\displaystyle \frac{-3}{10}[/tex]

Step-by-step explanation:

Slope formula:

[tex]\displaystyle \frac{y_2-y_1}{x_2-x_1}[/tex]

[tex]\displaystyle\frac{1-7}{18-(-2)}= \frac{-6}{20}=\frac{-6\div2}{20\div2}=\frac{-3}{10}=-\frac{3}{10}[/tex]

Therefore, the slope is -3/10, and the correct answer is -3/10.

Final answer:

To find the length of the pole, we can use the Pythagorean theorem.

Explanation:

To find the length of the pole, we can use the Pythagorean theorem. Since the base of the pole is 7 feet away from the wall and the top of the pole reaches 21 feet up the wall, we can envision a right triangle with the pole as the hypotenuse. Using the Pythagorean theorem, we can calculate:

c^2 = a^2 + b^2

Where c is the length of the pole, a is the base length (7 feet), and b is the height reached by the pole (21 feet).

Plugging in the values, we get:

c^2 = 7^2 + 21^2

Solving for c, we find that the length of the pole is √(7^2 + 21^2) feet.

Answer:

A. 30

Step-by-step explanation:

30*.08=24

Answer:

See below.

Step-by-step explanation:

All the equations are one-step equations.

In each case, see what operation is being done to the variable, and do the opposite operation to both sides.

1.

t + 1.32 = 3.48

1.32 is being added to t.

Subtract 1.32 from both sides.

t + 1.32 - 1.32 = 3.48 - 1.32

t = 2.16

2.

b - 4.22 = 7.08

4.22 is being subtracted from b.

Add 4.22 to both sides.

b - 4.22 + 4.22 = 7.08 + 4.22

b = 11.3

4.

h + 4/9 = 7/9

4/9 is being added to h.

Subtract 4/9 from both sides.

h + 4/9 - 4/9 = 7/9 - 4/9

h = 3/9

h = 1/3

5.

-5/8 = x - 1/4

1/4 is being subtracted from x.

Add 1/4 to both sides.

-5/8 + 1/4 = x - 1/4 + 1/4

-5/8 + 2/8 = x

-3/8 = x

x = -3/8

7.

3.2c = 9.6

c is being multiplied by 3.2.

Divide both sides by 3.2.

3.2c/3.2 = 9.6/3.2

c = 3

8.

-5.04 = 1.26d

c is being multiplied by 1.26.

Divide both sides by 1.26.

-5.04/1.26 = 1.26d/1.26

-4 = d

d = -4

10.

-2/3 = 3/4t

t is being multiplied by 3/4.

Divide both sides by 3/4 which is the same as multiplying both sides by 4/3.

-2/3 * 4/3 = 3/4t * 4/3

-8/9 = t

t = -8/9

11.

w/2.5 = 4.2

w is being divided by 2.5.

Multiply both sides by 2.5.

w/2.5 * 2.5 = 4.2 * 2.5

w = 10.5

Answer:

r<280

Step by step explanation:

Subtract 28 from both sides of the equation r+28<308.

r+28 subtracted by 28 leaves us with r<.

308-28 is 280.

Hence the equation becomes r<280.

The expression or inequality is 28 > r < 308 which represents 28 greater than r is less than 308.

It is defined as the combination of constants and variables with mathematical operators.

The question is incomplete.

The complete question is:

Write the expression for the word expression "28 greater than r is less than 308"

It is given that:

The statement is:

28 greater than r is less than 308:

Here r is the real number.

Inequality can be defined as the expression in mathematics in which both sides are not equal they have mathematical signs either less than or greater than known as inequality.

28 > r < 308

Thus, the expression or inequality is 28 > r < 308 which represents 28 greater than r is less than 308.

Learn more about the expression here:

brainly.com/question/14083225

#SPJ2

Answer:

Draw a line across  the points (6,0) and (0,3)

Step-by-step explanation:

This is the equation of a line, so it is enough to find two points (x,y), locate them and draw a straight line passing trough then,

Having said that, lets start.

The first easy point to find is the one that makes y=0, so we have the following equation: 0=-1/2 x +3, which gives that x=6, this point is (6,0)

The other easy point to find is the one that makes x=0, so we have the following equation y=-1/2 * 0 +3, which gives that y=3, this point is (0,3)

We have two points (6,0) and (0,3)

Answer:

look at explanation:

Step-by-step explanation:

1st picture: angle bisector

2nd picture: angle bisector

3rd picture: perpendicular bisector

4th picture: angle bisector

5th picture: perpendicular bisector

6th picture: perpendicular bisector

Answer:

a.$247

Step-by-step explanation:

39×5=195

195+52=247

Answer:

The answer is $247 (Option A)

Step-by-step explanation:

Pamela will have the car for 5 days.

The cost per renting is variable, and it increases as the days do.

5*$39= $195

And the LDW (Loss Damage Waiver) is an only once cost of $52

You can get the total rental cost by adding both of them:

$195+$52= $247 (Option A)

Answer:

1 Ounce = 28.3495231 Grams

Step-by-step explanation:

Answer:

28.38 grams to the nearest hundredth.

Step-by-step explanation:

By proportion there is 454 / 16

= 28.38 grams in an ounce.

Answer:

(2,4)

Step-by-step explanation:

We have the system:

y=x+2

y=3x-2.

This is already setup for substitution.

I'm going to replace my first y with what the second y equals.

That is, I'm going to write 3x-2=x+2.

Time to solve the following for x:

3x-2=x+2

Subtract x on both sides:

2x-2= 2

Add 2 on both sides:

2x. = 4

Divide both sides by 2:

x. = 2

Now that we know x=2 and we have an equation that relates x to y: either y=x+2 or y=3x-2, doesn't matter which we use, we can find y.

So we y=x+2 with x=2 which means y=2+2=4.

So the solution, the intersection, is (2,4).

Answer:

(2, 4 )

Step-by-step explanation:

Given the 2 equations

y = x + 2 → (1)

y = 3x - 2 → (2)

Substitute y = 3x - 2 into (1)

3x - 2 = x + 2 ( subtract x from both sides )

2x - 2 = 2 ( add 2 to both sides )

2x = 4 ( divide both sides by 2 )

x = 2

Substitute x = 2 into (1) for the corresponding value of y

y = x + 2 = 2 + 2 = 4

As a check

Substitute x = 2 into the 2 equations and check validity

(1) → y = 2 + 2 = 4 ← Correct

(2) → y = (3 × 2) - 2 = 6 - 2 = 4 ← Correct

Solution is (2, 4 )

For this case we must find the roots of the following equation:

[tex]3x ^ 2-4x + 2 = 0[/tex]

We have that the roots will come from:

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

Where:

[tex]a = 3\\b = -4\\c = 2[/tex]

Substituting the values:

[tex]x = \frac {- (- 4) \pm \sqrt {(- 4) ^ 2-4 (3) (2)}} {2 (3)}\\x = \frac {4 \pm \sqrt {16-24}} {6}\\x = \frac {4 \pm \sqrt {-8}} {6}\\x = \frac {4 \pm \sqrt {-1 * 8}} {6}\\x = \frac {4 \pmi \sqrt {2 ^ 2 * 2}} {6}\\x = \frac {4 \pm2i \sqrt {2}} {6}\\x = \frac {2 \pmi \sqrt {2}} {3}[/tex]

We have two complex roots:

[tex]x_ {1} = \frac {2 + i \sqrt {2}} {3}\\x_ {2} = \frac {2-i \sqrt {2}} {3}[/tex]

Answer:

[tex]x_ {1} = \frac {2 + i \sqrt {2}} {3}\\x_ {2} = \frac {2-i \sqrt {2}} {3}[/tex]

Answer:

[tex]y=\frac{1}{2}x+\frac{5}{2}[/tex]

Step-by-step explanation:

We are going to find the slope by lining up the points vertically and subtract, then put 2nd difference over first.

Also you could just use [tex]\frac{y_2-y_1}{x_2-x_1}[/tex].  It is the same thing.

(  5  ,   5)

-(  1  ,   3)

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

  4      2

So the slope is 2/4 or 1/2 after reducing.

The point-slope form a line is

[tex]y-y_1=m(x-x_1)[/tex] with a point on the line [tex](x_1,y_1)=(1,3)[/tex] given and with slope [tex]m=\frac{1}{2}[/tex] given.

[tex]y-3=\frac{1}{2}(x-1)[/tex]

We are going to solve this for y and simplify what we can because our goal is y=mx+b; this is slope-intercept form.  It is called that because it tells us the slope,m, and the y-intercept,b.

Distribute:

[tex]y-3=\frac{1}{2}x-\frac{1}{2}[/tex]

Add 3 on both sides:

[tex]y=\frac{1}{2}x-\frac{1}{2}+3[/tex]

Simplify:

[tex]y=\frac{1}{2}x+\frac{5}{2}[/tex]

Answer:

-18a⁷b⁷ + 42a²b⁵

Step-by-step explanation:

  (3a⁵b⁶ - 7b⁴)(-6a²b)

= (3a⁵b⁶)(-6a²b) – (7b⁴)(-6a²b)     Distributed the 6a²b term

= -18a⁷b⁷ - (-42a²b⁵)                     Multiplied and added exponents

= -18a⁷b⁷ + 42a²b⁵                       Removed parentheses

Answer:

The second choice

Step-by-step explanation:

The histogram shows the following:

3 children are within the ages of 5-10

7 children are within the ages of 11-13

4 children are within the ages of 14-18

So all you need to do is find the set of data that shows that fit the intervals. So find the data that have three values within 5 to 10; seven values with the 11-13; and four values within 14 to 18.

Answer:

Geometric Sequence.

[tex]a_{n}=(2)^{n-1}[/tex]

Step-by-step explanation:

The x-coordinates represent the number of terms of the sequence while the y-coordinates represent the term of the sequence. So the series shown on the graph is:

1, 2, 4, 8

We can see that the ratio of two consecutive terms of the above sequence is constant. i.e.

2/1 = 2

4/2 = 2

8/4 = 2

Such a sequence in which the ratio of two consecutive terms is a constant is known as Geometric Sequence and this constant ratio is known as common ratio.

The general term of a geometric sequence is represented as:

[tex]a_{n}=a_{1}(r)^{n-1}[/tex]

Using the values for the given sequence we get:

[tex]a_{n}=1(2)^{n-1}[/tex]

[tex]a_{n}=(2)^{n-1}[/tex]

Where n represents the number of term.

Step-by-step explanation:

Write a proportion.  3 laps is to 2 km as 5 laps is to x km.

3 / 2 = 5 / x

Cross multiply:

3x = 10

Divide:

x = 10/3

x = 3⅓

Madison will have run 3⅓ kilometers.

Answer:

c) -20x^2+14x+12

all real numbers

Step-by-step explanation:

So (fg)(x)=f(x)g(x)=(-4x-2)(5x-6).

Need find the expression in standard form we need to use foil:

First:  (-4x)(5x)=-20x^2

Outer: (-4x)(-6)=24x

Inner:  (-2)(5x)=-10x

Last:  (-2)(-6)=12

--------------------------Add like terms:

-20x^2+14x+12

Polynomials have domain all real numbers.

There are no restrictions on what x can be.  For every number you plug in, you will get a number back.  

Answer:

c.-20x^2 + 14x + 12; all real numbers

Step-by-step explanation:

f(x) = -4x - 2

g(x) = 5x - 6

Therefore, -20x^2 + 14x + 12; all real numbers.

Answer:

1

Step-by-step explanation:

(f °g)(3) = f(g(3)) = f(-13) = 1

Answer:

A

Step-by-step explanation:

Given

x³ - 4x² - 3 divided by x + 1

Write the coefficients of the polynomial in descending order, including a zero for any terms not included in the polynomial.

In this case a 0 is required to denote the x- term

Division by ( x + h) is evaluated for x = - h, hence

division by x + 1 is evaluated for x = - 1, hence

- 1 | 1  - 4  0  - 3 ← is the required synthetic division → A

For this case we have that by definition[tex]\pi[/tex] equals 180 degrees.

We must convert 135 degrees to radians, then:

[tex]135 * \frac {\pi} {180} =\\135 * \frac {3.14} {180} =\\\frac {423.9} {180} = 2.355[/tex]

Rounding off we have:

2.4 radians.

Answer:

2.4 radians

Answer:

Step-by-step explanation:

We will check whether the given pair x = 3 and y = 2 is the solution of the first equation.

4(3) - 5(2) = 12 - 10 = 2 CORRECT

Put x = 3 and y = 2 to the equation 6x + 7y = Q:

Q = 6(3) + 7(2)

Q = 18 + 14

Q = 32