please help... I really need this.

Answer:

The resulting equation is

x^2/4+16x^2/9=1

Step-by-step explanation:

The given equations are:

3y=12x   eq(1)

x^2/4+y^2/9=1    eq(2)

We need to isolate variable y in equation 1

Divide both sides of the equation with 3

3y/3 = 12x/3

y = 4x

Now, substitute the value of y=4x in second equation

x^2/4+y^2/9=1

x^2/4 + (4x)^2/9 = 1

The resulting equation is

x^2/4+16x^2/9=1

Answer:

[tex]\frac{x^2}{4}+\frac{(4x)^2}{9}=1[/tex]

Step-by-step explanation:

Given system of equations,

[tex]3y=12x-----(1)[/tex]

[tex]\frac{x^2}{4}+\frac{y^2}{9}=1----(2)[/tex]

As per statement,

Isolating the variable y in the first equation,

[tex]y=\frac{12}{3}x=4[/tex]

Now, substituting into the second equation,

[tex]\frac{x^2}{4}+\frac{(4x)^2}{9}=1[/tex]

Which is the resulting equation,

Simplifying the equation,

[tex]\frac{x^2}{4}+\frac{16x^2}{9}=1[/tex]

[tex]\frac{9x^2+64x^2}{36}=1[/tex]

[tex]73x^2=36[/tex]

Answer:

C D and E

Step-by-step explanation:

The only one you probably can never do is B. It get's you no where. The way A is written, it is not much help to write 18 in base 2. So A and B both won't work. The common logs and the natural logs will both work

Log(4^(x + 3)) = Log(18)

(x + 3) Log(4) = log (18)

(x + 3) * 0.6021 = 1.2553

x + 3 = 1.2553/0.6021

x + 3 = 2.08496

Now all you need do is subtract 3 from both sides. The natural logs will give you the same answer.

You could take base-4 logs of both sides and it is a possible first step, but d and e are much more efficient. You have to change both sides to base 4 before you can proceed. This one is kind of iffy.  It does say possible first steps.

Answer:

C.Take the base-4 logarithm of each side.

D.Take the natural logarithm of each side.

E. Take the common logarithm of each side.

Step-by-step explanation:

Answer:

2 units

Step-by-step explanation:

ok, so, the line below says HJ is (x+1) units long. therefore:

2x-16+8 = x+1

now, let's isolate the variable.

2x-x = 1+16-8

x = 9

since we now defined variable x, we can add it to the equation that determines the length of HI.

2x-16

2(9)-16

18-16

2

the length of line segment HI is 2 units

hope this helped!

HI + IJ = HJ

With this knowledge you can from an equation like so...

2x - 16 + 8 = x + 1

Now combine like terms and solve for x

2x + (- 8 + 8) = x + 1 + 8

2x = x + 9

2x - x = x - x + 9

x = 9

To find HI plug 9 in for x and simplify

2(9) - 16

18 - 16

2

The length of HI is 2!!!

Hope this helped!

~Just a girl in love with Shawn Mendes

Answer:

5

Step-by-step explanation:

1. Find the Mean

(2+8+10+16)/4=9

2.For each number, subtract the Mean and square the result.

(2-9)^2=49

(8-9)^2=1

(10-9)^2=1

(16-9)^2=49

3. Find the Mean of those squared differences.

(49+1+1+49)/4=25

4.Take the square root of that and this is what you want.

square root of 25 = 5

If the value of the mean is 9. Then the mean absolute deviation will be 4.

It is the average distance between each data point and the mean.

The MAD is given as

[tex]\rm MAD = \dfrac{\Sigma _{i = 1}^n|x_i - \mu|}{n}[/tex]

The data set is given below.

2,8,10,16

Then the mean will be

μ = (2 + 8 + 10 + 16) / 4

μ = 36 / 4

μ = 9

Then the mean absolute deviation will be

MAD = (|2 - 9| + |8 - 9| + |10 - 9| + |16 - 9|) / 4

MAD = (7 + 1 + 1 + 7) / 4

MAD = 16 / 4

MAD = 4

More about the mean absolute deviation link is given below.

https://brainly.com/question/10258446

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Replace x with the binomial a - 2.

f(a - 2) = [3(a - 2) + 5]/(a- 2)

f(a - 2) = [3a - 6 + 5]/(a - 2)

f(a - 2) = [3a - 1]/(a - 2)

f(a - 2) = (3a - 1)/(a - 2)

Done.

Answer: 45°

Step-by-step explanation:

Because AB and CD are parallel, angle x must be congruent with its corresponding angle.

For this case we have that by definition, the distance between two points is given by:

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

We have the following points:

[tex](x_ {1}, y_ {1}): (- 3,4)\\(x_ {2}, y_ {2}) :( 21,11)[/tex]

We replace:

[tex]d = \sqrt {(21 - (- 3)) ^ 2+ (11-4) ^ 2}\\d = \sqrt {(21 + 3) ^ 2 + (11-4) ^ 2}\\d = \sqrt {(24) ^ 2 + (7) ^ 2}\\d = \sqrt {576 + 49}\\d = \sqrt {625}\\d = 25[/tex]

Thus, the distance between the two points is 25 units.

Answer:

25

Answer:

The distance is 25 units

Step-by-step explanation:

Points to remember

Distance formula

Length of a line segment with end points (x1, y1) and (x2, y2) is given by,

Distance = √[(x2 - x1)² + (y2 - y1)²]

To find the distance between given points

Here (x1, y1) = (-3, 4) and (x2, y2) = (21, 11)

Distance = √[(x2 - x1)² + (y2 - y1)²]

= √[(21 - -3)² + (11 - 4)²]

= √[(21 +3)² + (11 - 4)²]

= √[24² + 7²]

 = √(576 + 49)

 = √625

 =25

Therefore the distance is 25 units

See the attached picture:

Answer:

Step-by-step explanation:

The dominant term of this function is x^4.  The graph of x^4 starts in Quadrant II and continues in Quadrant I.

If we have y = -x^4, the graph starts in Quadrant III and continues in Quadrant IV.  This is the end behavior for f(x)=-x^4+5x^3-3.

Answer:

[tex]x^{5}[/tex]

Step-by-step explanation:

We simply add the exponents together. This depicts the exponent product rule, which states that when multiplying together two values with the same base (x) but different exponents, we can solve the answer by adding together the exponents with the base staying the same.

Explanation / Proof:

[tex]2^{2} * 2^{3} = 4 * 8 = 32\\\\2^{2} * 2^{3} = 2^{5} = 2*2*2*2*2 = 32[/tex]

As you can see, adding together the exponents will give the same answer. Therefore, the answer is [tex]x^{5}[/tex].

Answer:

The length of the missing side of the triangle is represented by the equation:

  (6a + 2b - 5) - (2a - 3b) - (a - 3)

= 6a + 2b - 5 - 2a + 3b - a + 3

= 3a + 5b - 2

Answer:

1. 50 cm

2. 550 mm

3. 5000 mm

4. 5000 cm

5. 5000 m

Step-by-step explanation:

We can convert all the measures in same unit to arrange them one by one.

5000 cm:

As there are 10 millimeters in 1 cm,

5000 cm = 5000*10mm

=> 50000 mm

5000 meters:

As there are 100 cms in one meter

5000 m = 5000*100 cm

=> 500000 cm

Now to convert in millimeter

500000*10= 5000000 mm

50 cm:

50*10 = 500 mm

Then there is 550 mm and 5000 mm

So, the order from least to greatest is:

1. 500 mm which is equivalent of 50 cm

2. 550 mm

3. 5000 mm

4. 50000 mm which was equivalent of 5000 cm

5. 5000000 mm which was equivalent of 5000 m ..

Final answer:

To compare the given measurements, we converted each one to millimeters (mm) using a conversion table, then arranged them in ascending order: 50 cm (500 mm), 550 mm, 5,000 mm, 5,000 cm (50,000 mm), and 5,000 m (50,000,000 mm).

Explanation:

To determine which of the given measures is the smallest and which is the largest, we need to convert each measure to the same unit for comparison. Using the ratio conversion table, we will convert all measures to millimeters (mm).

Now we arrange the measures in order from least to greatest:

Answer:

m=4

Step-by-step explanation:

3-(-1)/-1-(-2)=3+1/-1+2=4/1

Answer:

4

Step-by-step explanation:

Slope formula:

     ↓

[tex]\frac{\huge Y_2-Y_1}{\huge X_2-X_1}=\frac{Rise}{run}[/tex]

[tex]Y_2=(-1)\\Y_1=3\\X_2=(-2)\\X_1=(-1)\\[/tex]

[tex]\frac{(-1)-3}{(-2)-(-1)}=\frac{-4}{-1}=4[/tex]

Therefore, the slope is 4.

4 is the correct answer.

I hope this helps you, and have a wonderful day!

Answer:

The correct answer is R(2, 4)

Step-by-step explanation:

Answer:

The mistake is that from Step 1 to Step 2, Jorge did not add 0.25 correctly to both sides.

Step-by-step explanation:

If Marcel has $8.25 and is only playing $0.25 games, then the equation will be given by:  8.25 - 0.25X.

If Floyd has $9.75 and is only playing $0.75 games, then the equation will be given by:  9.75 - 0.75X.

If we want to find the number of games after which Marcel and Floyd will have the same amount of money remaining, we need to solve the system of equations:

Equation: 8.25 - 0.25X = 9.75 - 0.75X

Step 1: -1.50 - 0.25X = - 0.75X

Step 2: -1.50 = - 0.50X

Step 3: x=3

The mistake is that from Step 1 to Step 2, Jorge did not add 0.25 correctly to both sides.

Answer: Option B

From Step 1 to Step 2, Jorge did not add 0.25x correctly to both sides.

Step-by-step explanation:

To solve this problem, let's consider the initial equation that Jorge had.

[tex]8.25-0.25x=9.75-0.75x[/tex]

Subtract 9.75 on both sides of equality

[tex]8.25-9.75-0.25x=9.75-9.75-0.75x[/tex]

[tex]-1.50-0.25x=-0.75x[/tex]

Add 0.25x on both sides of equality

[tex]-1.50-0.25x+0.25x=-0.75x+0.25x[/tex]

[tex]-1.50=-0.50x[/tex]

[tex]x=3[/tex]

You can see then that Jorge's error was adding [tex]-0.75x + 0.25x[/tex]

When this sum is correctly done, the result is [tex]-0.50x[/tex]

The answer is the option B.

Answer:

-a (14 +a) =0

Step-by-step explanation:

-14a-a^2=0

Factor out  -a

-a (14 +a) =0

Using the zero product property

-a =0   14+a =0

a =0   a = -14

Answer:

y = (-1/2)x -3

Step-by-step explanation:

We are given

y = 2x-17

which is in slope-intercept form: y = mx +b

Where m is the slope. so, m= 2

But this is perpendicular, When a line is perpendicular then the slope become -1/m so in our case the slope m will be = -1/2

Using the point(-8,1) we can find the b i.e the y intercept

We have x = -8, y =1 and m=-1/2

y = mx + b

1 = (-1/2)(-8) + b

1 = 4 + b

=> b = 1-4

b = -3

The equation of slope intercept form will be

y = mx + b

Putting value of m= -1/2 and b = -3

y = (-1/2)x -3

Answer:

n² + 3

Step-by-step explanation:

It's a quadratic sequence, so it follows the form:

y = ax² + bx + c

We're given five points that satisfy the equation.  (1, 4), (2, 7), (3, 12), (4, 19), and (5, 28).  Picking any three points, we can form a system of equations.

If we pick (1, 4), (2, 7), and (4, 19):

4 = a(1)² + b(1) + c

7 = a(2)² + b(2) + c

19 = a(4)² + b(4) + c

4 = a + b + c

7 = 4a + 2b + c

19 = 16a + 4b + c

Through substitution, elimination, or trial and error, we can find a = 1, b = 0, and c = 3.

y = x² + 3

So the nth term of the sequence is n² + 3.

Answer:

a(n) = a(n-1) + (2n - 1)

Step-by-step explanation:

Start by analyzing the pattern:

7 is 3 more than 4;

12 is 5 more than 7;

19 is 7 more than 12, and so on.  

Each step is an odd number and is 2 greater than the previous step.

a(2) = 7 = 4 + step = 4 + 3 = 7

a(3) = 12 = 7 + step = 7 + 5 = 12

a(4) =                      12 + 7  = 19

a(5) =                       19 + 9 = 28

and so on.  

Looking at a(2), we see that the step is 2+1, or 3;

Looking at a(3), we see that the step is 2(3) - 1, or 5;

Looking at a(4), we see that the step is 2(4) - 1, or 7; and so on.

Looking at a(n), we see that the step is 2n - 1.

Thus, a(n) = a(n-1) + (2n - 1)

Answer:

5

Step-by-step explanation:

When you given input of "x" into a floor function  y = ⌊x⌋ , it gives as output the "greatest integer less than or equal to x"

For example, if we were to given 1.4 as the input for floor function, it will return the greatest integer that is less than or equal to 1.4, so it would be 1.

So, if we put 5.7 into this function, the floor function would give "5" as the output.

Thus value of y would be 5

Answer:

5

Step-by-step explanation:

Answer:

-3

Step-by-step explanation:

Answer:

The slope of the line is [tex]m=-3[/tex]

Step-by-step explanation:

For a linear equation of the form

[tex]y = mx + b[/tex]

the slope of the line is the constant m

in this case we have the equation

[tex]y + 1 = -3x[/tex]

Solving for y we have:

[tex]y = -3x -1[/tex]

Then [tex]m = -3[/tex]

The slope of the line is -3

Answer:

dy/dx = [tex]\frac{1}{(4x^{3}-7)}*[\frac{(3x^{5}+1)(12x^{2})-(4x^{3}-7)(15x^{4})}{(3x^{5}+1)}][/tex]

Step-by-step explanation:

* Lets revise some rules for the derivative

- The derivative of ㏑(f(x)) = 1/f(x) × f'(x)

- The derivative of u/v = (vu'-uv')/v²

- The derivative of the constant is 0

* Lets solve the problem

∵ y = ㏑[(4x³ - 7)/(3x^5 + 1)]

- Let u = 4x³ - 7 and v = 3x^5 + 1

∵ u = 4x³ - 7

∴ u' = 4(3)x^(3-1) - 0 = 12x²

∵ v = 3x^5 + 1

∴ v' = 3(5)x^(5-1) + 0 = 15x^4

∵ The derivative of u/v = (vu' - uv')/v²

∴ The derivative of u/v = [tex]\frac{(3x^{5}+1)(12x^{2})-(4x^{3}-7)(15x^{4})}{(3x^{5}+1)^{2}}[/tex]

∵ The derivative of ㏑(f(x)) = 1/f(x) × f'(x)

∴ dy/dx = [tex]\frac{1}{\frac{(4x^{3}-7)}{(3x^{5}+1)}}*[\frac{(3x^{5}+1)(12x^{2})-(4x^{3}-7)(15x^{4}}{(3x^{5}+1)^{2}}][/tex]

- Simplify by cancel bracket (3x^5 + 1)from the 1st fraction with the

 same bracket in the 2nd fraction

∴ dy/dx = [tex]\frac{1}{(4x^{3}-7)}*[\frac{(3x^{5}+1)(12x^{2})-(4x^{3}-7)(15x^{4})}{(3x^{5}+1)}][/tex]

[tex]\text{Hey there!}[/tex]

[tex]\text{The word \bf{of}}\text{ means multiply in mathematical terms.}[/tex]

[tex]\text{Percentages (\%) usually run out of 100}[/tex]

[tex]\text{First, put the numbers set to multiply from each other.}[/tex]

[tex]\text{7\%}\times\text{14.50}[/tex]

[tex]\text{(You can convert the percentage into a decimal (if you want but it is mandatory)}[/tex] [tex]\leftarrow\text{in order for you to convert them into a decimal you have to divide 7\%}[/tex] [tex]\text{from 100}[/tex]

[tex]\dfrac{7\%}{100}[/tex]

[tex]\dfrac{7\%}{100}=0.07[/tex]

[tex]\text{Next, solve for your answer.}[/tex]

[tex]\text{0.07}\times\text{14.50 = ?}[/tex]

[tex]\text{Solve the one above, and you SHOULD get your result!}[/tex]

[tex]\boxed{\boxed{\bf{Thus,\ your\ answer\ is: 1.015}}}\checkmark[/tex]

[tex]\text{Good luck on your assignment and enjoy your day!}[/tex]

~[tex]\frak{LoveYourselfFirst:)}[/tex]

Answer:

y+3 = -7/5(x+2)

Step-by-step explanation:

First we need to find the slope

m = (y2-y1)/(x2-x1)

   = (4--3)/(-7--2)

  = (4+3)/(-7+2)

  =7/-5

  = -7/5

The point slope form is y-y1 = m(x-x1)

y--3 = -7/5(x--2)

y+3 = -7/5(x+2)

We could use the second set of points

y-4 = -7/5(x--7)

y-4 =-7/5(x+7)

Answer for A. (-8,-2)

answer for B. (4,-7)

Answer:

y = 4.125x + 496.25

Step-by-step explanation:

Set the data up as points. Then deal with the points.

Givens

(30,620)

(70,785)

y2 = 785

y1 = 620

x2 = 70

x1 = 30

Formula

Slope = (y2 - y1) / (x2 - x1)

Solution

Slope = (785 - 620)/(70 - 30)

Slope = 165 / 40

Slope = 4.125

===================

Now you need the y intercept. Either one of the two given points will give you that.

y = 620

x = 30

m = 4.125

y = mx + b

620 = 4.125*30 + b

620 = 123.75 + b

620 - 123.75 + b

b = 496.25

the linear function that describes the relationship between study hours and exam scores is:

y = 4.125x + 496.25

To find a linear function that fits the data provided, we'll use the points (30, 620) and (70, 785), which represent the number of hours spent studying and the corresponding exam scores. The general form of a linear equation is y = mx + b, where m is the slope and b is the y-intercept.

First, we calculate the slope (m):

m = (y2 - y1) / (x2 - x1) = (785 - 620) / (70 - 30) = 165 / 40 = 4.125

Next, we use one of the points to solve for b (y-intercept). Let's use the point (30, 620):

620 = 4.125(30) + b

b = 620 - (4.125 × 30) = 620 - 123.75 = 496.25

So the linear function that describes the relationship between study hours and exam scores is:

y = 4.125x + 496.25

Answer:

C

Step-by-step explanation:

To evaluate f(g(7)), substitute x = 7 into g(x), then substitute the result into f(x)

g(7) = (2 × 7) - 5 = 14 - 5 = 9, then

f(9) = 3(9)² - 4 = 243 - 4 = 239 → C

Option C is correct.

Given functions are, [tex]f(x)=3x^{2} -4,g(x)=2x-5[/tex]

We have to find  [tex]f(g(7))[/tex].

             [tex]g(7)=2*7-5=14-5=9[/tex]

So that,  [tex]f(g(7))=f(9)[/tex]

           [tex]f(9)=3*(9)^{2}-4\\ \\f(9)=243-4=239\\\\f(g(7))=f(9)=239[/tex]

Learn more about the composite function here:

https://brainly.com/question/10687170

Answer:

x = -8  &  x = 3

Step-by-step explanation:

Vertical asymptote occur when denominator is 0.

So to find the x-values, we need to middle term factor the denominator. Shown below:

[tex]x^2+5x-24\\=(x+8)(x-3)\\x=3, -8[/tex]

Thus, at x = 3 and at x = -8  --  there is vertical asymptote.

Answer:

C

Step-by-step explanation:

Since the angles at the centre subtended by the congruent arcs WX and YZ

Then ∠YOZ = ∠WOX = 103° → C

The measure of the angle YOZ is b°.  Option c is correct.

In a circle arc WX and YZ are congruent. Than angle YOZ is to be determine.

Arc is defined as the circular curve or part of circle. Arc = angle * radius.

Here, arc WX = arc YZ
If arc is equal in a circle than angle sub tainted by this arc to center are also equal.
angle YOZ = angle WOX = 103°

Thus, the measure of the angle YOZ is 103°.

Learn more about arc here:
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Find  the cost of the chair and desk by multiplying the total amount pent by the 70%

Chair and desk = 900 x 0.70 = $60

Subtract that cost from the total spent:

900 - 630 = $270 was spent on the other three items.

Subtract the cost of the bookshelf:

270 - 50 = 220

The two tables cost 220.

For the price of one table divide that cost by 2:

220/2 = 110

One table cost $110.

The cost of each table is $110.

Given that

There are five items i.e. chair, bookshelf, 2 tables, and a desk.

The total amount incurred for these 5 items should be $900.

And, the chair + desk = 70% of total.

The cost of the bookshelf is $50.

Since 70% of total = chair + desk

That means

Chair + desk = 0.70 of $900 = $630

So the other items cost should be

= $900 - $630

= $270

And, the cost of bookshelf is $50

So, the two tables cost should be

= $270 - $50

= $220

So for one it should be

= $220 ÷ 2

= $110

Therefore we can conclude that the cost of each table is $110.

Learn more about the cost here: brainly.com/question/5282141