what is the answer for 4x-9=k solve for x

Answers

Answer 1

4x - 9 = k

4x - 9 (+9) = k (+9)

4x/4 = (k+9)/4

x = (k+ 9)/4

hope this helps

Related Questions

A farmer drives a tractor from one town to another, a distance of 120 kilometers. He drives 10 kilometers per hour fast on the return trip, cutting an hour off the time. How fast does he drive each way?

Answers

120/x - 120/(x+10) = 1
120x + 1200 - 120x = x(x+10)
1200 = x^2+10x
x^2 + 10x - 1200 = 0
(x+40)(x-30) = 0
Positive solution:
x = 30 km/hr (rate on the 1st trip)
x+10 = 40 km/hr (rate on the return trip)

Solve for x. Show each step of the solution. 4.5(8−)+36=102−2.5(3+24) i need to show my work dont just give me the answer

Answers

4.5 * (8-) + 36 = 102 - 2.5 * 27
4.5 * 8 - 36 = 102 - 2.5 * 27
36 - 36 = 102 - 2.5 * 27
36 - 36 = 102 - 67.5
36 - 36 = 34.5
Since we know 36 - 36 doesn't equal 34.5 its not true so there is NO ANSWER.

4.5(8 - x) + 36 = 102 - 2.5(3x + 24)

36 - 4.5x + 36 = 102 - 7.5x - 60

-4.5x + 72 = 42 - 7.5x
add 7.5x to each side and subtract 72 from each side

3x = 42 - 72

3x = -30

PLEASE HELP! I'm so confused!
Hourly employees working more than 40 hr a week are often paid "time and a half" for overtime, any hours beyond 40. In the formula p = wr + 1.5we, gross pay (p) is computed by multiplying the hourly wage (w) by the number of regular hours worked (r[tex] \leq [/tex]40) and adding 1.5 times the product of the hourly wage (w) and the number of extra hours (e) beyond 40. Find your gross pay if you work the given number of hours at the given rate.

40 hr at $8.12/hr

47 hr at $10.92/hr

Answers

ummmm..... 3245.78 per week.

Suppose y varies directly with X

Answers

Direct variation is represented by the following equation:

y = kx

We can use the given (x,y) point to find k.

18 = k * 3

k = 6

Our direct variation is

y = 6x

Now we need x when y = 24.

24 = 6x

x = 4

What do you do the inequality symbol when you multiply or divide by a negative number?

Answers

u pretty much solve inequalities much like u solve equations except for one important rule. That rule deals with inequalities. If u have to divide or multiply by a negative number, u have to change the inequality sign. if it is greater then (>) and u have to divide/multiply by a negative number, then u change the inequality sign to less then (<)...and vice-versa

Solve for x: 3x − 5 = 2x + 6.
1
−1
11
−11

Answers

First you want to get the x's on the same side
3x-5=2x+6
subtract 2x and add 5
x=11

Hope this helps!

Answer:

X = 11 sweetheart

Which object models a line ?
A. a fly
B. a wall
C. a meter stick
D. a television

Answers

The object is a meter stick that models a line.

What is a line?

A line is an object in geometry that is indefinitely long and has neither breadth nor depth nor curvature.

Since lines can exist in two, three, or higher dimensional environments, they are one-dimensional things.

In daily language, a line segment with two points designating its endpoints is also referred to as a "line."

From the given choices:

A meter stick models a line.

Therefore, the object is a meter stick.

To learn more about the line;

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PLEASE HELP! What is the first step you will use to solve this equation:

4x +2 = 7x - 13

Question 1 options:

Add 13 to both sides

Subtract 2 from both sides

Add 7x to both sides

Subtract 4x from both sides

Answers

Add 7x to both sides

4x + 2 = 7x - 13

adding 13 to either side or subtracting 2 from either side will be the same thing
So either of them will be the right answer

Tell whether the lines for each pair of equations are parallel, perpendicular, or neither.

7x – 4y = 4
x – 4y = 3

A. Perpendicular
B. Parallel
C. Neither

Answers

I think C because parallel lines would have the same gradient or slope. If they were perpendicular the product of their slopes would be -1. Also parallel lines don’t intercept one another, but these equations can be solved for unique x and y which is their point of intersection.

Find the least common multiple of x 3 - x 2 + x - 1 and x 2 - 1. write the answer in factored form.
a. (x + 1) 2(x - 1)
b. (x + 1)(x - 1)(x 2 + 1)
c. (x 3 - x 2 + x - 1)(x 2 - 1)
d. (x + 1)(x - 1)(x 2 - 1)

Answers

Let
f(x) = x³ - x² + x - 1
g(x) = x² - 1

By the remainder theorem, f(1) = 1 -1 + 1 - 1 = 0
Therefore (x-1) is a factor.
Perform synthetic division.

1 | 1 -1 1 -1
1 0 1
--------------
1 0 1 0

Therefore,
f(x) = (x-1)(x²+1)

Also,
g(x) = (x+1)(x-1)

Answer: b.
The least common multiple for f(x) and g(x) is (x + 1)(x - 1)(x² + 1).

The correct answer is d. [tex](x + 1)(x - 1)(x^2 - 1)[/tex].

To find the least common multiple (LCM) of the two polynomials[tex]$x^3 - x^2 + x - 1$ and $x^2 - 1$[/tex], we need to factor each polynomial and then find the LCM of the factors.

First, let's factor [tex]$x^3 - x^2 + x - 1$[/tex]:

[tex]$x^3 - x^2 + x - 1 = x^2(x - 1) + (x - 1) = (x^2 + 1)(x - 1)$[/tex].

Now, let's factor [tex]$x^2 - 1$[/tex]:

[tex]$x^2 - 1 = (x + 1)(x - 1)$[/tex].

The LCM of two polynomials is the product of the highest powers of all the factors that appear in either polynomial. Here, we have the factors [tex]$x - 1$, $x + 1$, and $x^2 + 1$[/tex] from the first polynomial, and the factors [tex]$x - 1$ and $x + 1$[/tex] from the second polynomial.

Since [tex]$x^2 + 1$[/tex] is already the highest power of [tex]$x^2 + 1$ , $x - 1$ and $x + 1$[/tex] are the highest powers of [tex]$x - 1$ and $x + 1$[/tex] respectively, the LCM is simply the product of all these factors:

[tex]$(x + 1)(x - 1)(x^2 + 1)$[/tex].

However, we notice that [tex]$x^2 - 1$[/tex] is actually equal to [tex]$(x + 1)(x - 1)$[/tex], and since [tex]$x^2 + 1$[/tex] is not a factor of [tex]$x^2 - 1$[/tex], we do not include it in the LCM. Therefore, the LCM is just [tex]$(x + 1)(x - 1)$[/tex].

But we must also consider the polynomial [tex]$x^3 - x^2 + x - 1$[/tex], which can be rewritten as [tex]$(x^2 + 1)(x - 1)$[/tex]. Since [tex]$x^2 + 1$[/tex] is not a factor of [tex]$x^2 - 1$[/tex], it must be included in the LCM to account for the additional factor in the first polynomial.

Thus, the LCM of [tex]$x^3 - x^2 + x - 1$ and $x^2 - 1$[/tex] is [tex]$(x + 1)(x - 1)(x^2 - 1)$[/tex], which corresponds to option d. This is because we take the highest powers of the common factors [tex]$(x + 1)$ and $(x - 1)$[/tex], and include the additional factor from the first polynomial, which is [tex]$x^2 - 1$[/tex] since [tex]$x^2 + 1$[/tex] is not a factor of[tex](x^2 - 1\))[/tex].

Therefore, the final answer is [tex]$\boxed{(x + 1)(x - 1)(x^2 - 1)}$[/tex].

Which property of equality would be used to isolate the variable b in this equation? (3/4) b= 12

Answers

C. multiplication property of equality

BRAINLIEST!!!!!!!!!!!!!!!!!!!!!!

1. A store had 235 MP3 players in the month of January. Every month, 30% of the MP3 players were sold and 50 new MP3 players were stocked in the store.

Which recursive function best represents the number of MP3 players in the store f(n) after n months?

f(n) = 0.7 x f(n − 1) + 50, f(0) = 235, n > 0
f(n) = 237 − 0.7 x f(n − 1) + 50, f(0) = 235, n > 0
f(n) = 0.3 x f(n − 1) + 50, f(0) = 235, n > 0
f(n) = 237 + 0.7 x f(n − 1) + 50, f(0) = 235, n > 0

2. Sophia invested some money in a bank at a fixed rate of interest compounded annually. The equation below shows the value of her investment after x years:

f(x) = 500(1.05)x

What was the average rate of change of the value of Sophia's investment from the second year to the fourth year?

14.13 dollars per year
28.25 dollars per year
50.00 dollars per year
56.50 dollars per year

Answers

Part 1:

Given that a store had 235 MP3 players in the month of January and that every month, 30% of the MP3 players were sold and 50 new MP3 players were stocked in the store.

The number of MP3 players in the store after the previous months sale is given by 0.7f(n - 1) and the number of MP3 players in the store after new MP3 were added is 0.7f(n - 1) + 50.

Therefore, the recursive function that best represents the number of MP3 players in the store f(n) after n months is given by f(n) = 0.7 x f(n − 1) + 50, f(0) = 235, n > 0

Part 2:

The average rate of change of a function from a to b is given by

[tex]average \ rate \ of \ change= \frac{f(b)-f(a)}{b-a} [/tex]

Given that the equation showing the value of her investment after x years is given by

[tex]f(x)=500(1.05)^x [/tex]

Thus, the average rate of change of the value of Sophia's investment from the second year to the fourth year is given by

[tex]Average \ rate \ of \ change= \frac{f(4)-f(2)}{4-2} \\ \\ = \frac{500(1.05)^4-500(1.05)^2}{2} = \frac{607.75-551.25}{2} \\ \\ = \frac{56.5}{2} =28.25[/tex]

Therefore, the average rate of change of the value of Sophia's investment from the second year to the fourth year is 28.25 dollars per year.

1. f(n) = 0.7 x f(n â’ 1) + 50, f(0) = 235, n >= 0 2. 28.25 dollars per year 1. For this problem, let's construct the recursive formula ourselves. We know that f(0) will be 235 since that's the original stock and that n has to be greater than or equal to 0 (n=0 represents the starting stock). So we have f(n) = ?, f(0) = 235, n >= 0 Now each month we sell 30%, so we're left with 70% of the previous month's stock (100% - 30% = 70%). So let's take that into account for our function. f(n) = 0.7 x f(n-1), f(0) = 235, n >= 0 And each month we get another 50 MP3 players. Let's add that into our function. f(n) = 0.7 x f(n-1) + 50, f(0) = 235, n >= 0 And that's our answer. 2. Since we've been given the function f(x) = 500(1.05)^x, let's calculate the amount of money that we have after 2 years and 4 years. f(2) = 500(1.05)^2 = 551.25 f(4) = 500(1.05)^4 = 607.75 Now get the difference in money between those years. 607.75 - 551.25 = 56.50 And since we're talking about a period of 2 years and we want the average rate per year, divide by 2. 56.50 / 2 = 28.25 So the average change from year 2 to year 4 is $28.25 per year.

What is the value of x in the equation x – y = 30, when y = 15?

Answers

If y=15 then x=45 because 45 minus 15 is 30

Hope this helps :))

y=15 then x=45
thats ur answer :)

Please help me thank you very much.

Please answer all 4 questions.

Answers

1. HI Because two parallel lines have to be on the same plane and never intersect.

2. Skew means the never intersect and they aren't on the same plane so it is GK and DH

3. Angle 3 corresponds because it is the bottom left and 7 is the bottom left.

4. 3 and 5 are same-side interior because they are both on the left side and both are inside.

Hope this helps!

H=62.4Ns/33,000 solve for N
please help

Answers

1. convert decimal to fraction
2. simplify fraction
3. cross multiply
4. divide by 13
5. Solve
n=6875/13 h

Answer:

[tex]N=\frac{33,000H}{62.4s}[/tex]

Step-by-step explanation:

We have been given an equation [tex]H=\frac{62.4Ns}{33,000}[/tex]. We are asked to solve our given equation for N.

Multiply both sides by 33,000:

[tex]H*33,000=\frac{62.4Ns}{33,000}*33,000[/tex]

[tex]33,000H=62.4Ns[/tex]

Switch sides:

[tex]62.4Ns=33,000H[/tex]

Divide both sides by [tex]62.4s[/tex]:

[tex]\frac{62.4Ns}{62.4s}=\frac{33,000H}{62.4s}[/tex]

[tex]N=\frac{33,000H}{62.4s}[/tex]

Therefore, the value of N is [tex]\frac{33,000H}{62.4s}[/tex].

1. Is the equation true, false, or open? 9p + 8 = 10p + 7 A. Open; there is a variable. B. True; the expressions are the same for all values of the variables. C. False; the expression are never the same.

Also all the answers in the Unit Test please

Answers

C. False; the expression are never the same

What is the value of h(−2) when h(x)=3x+1 ?

Enter your answer in the box.

h(−2)=
HELP PLS 30PTS

Answers

h(x) = 3x+1

h(-2) = 3(-2) +1 =-6 +1 =-5

h(-2) = -5

Answer:

we have

h(x)=3x+1

now

h(-2)=3×-2+1=5 is your answer

Please help! 20 points!

Answers

Since the object is larger, the dilation can not be negative and less than 1. Therefore, your answer is 1.25 (d). Also, 4 * 1.25 is 5.

divide: 5/4 = 1.25

answer is 1.25

Y2 + 30 ÷ x - 8 what is the value of the expression when x = 6 and y = 8?

Answers

Assuming that by Y2 you mean 2 * Y (I'd suggest flipping them for organizational purposes), you'd just plug in for the values.

So 2(8) + 30 ÷ 6 - 8. PEMDAS says we do the multiplication and division first.
This gives us 16 + 5 - 8 = 13.

Again assuming Y2 means 2 * Y in your equation, the answer is 13.

Y2 + 30 ÷ x - 8 i think this y power 2 ??

8 power 2 + 30 ÷ 6 - 8 =

64 + 30 ÷ 6 - 8 =

64 +5- 8 = 61

we use first the power then the multiplication or division and the last addition and subtraction

For spring break you and some friends plan a road trip to a sunny destination that is 1705 miles away. if you drive a car that gets 39 miles per gallon and gas costs $3.339/gal, about how much will it cost to get to your destination?

Answers

1705/39 = 43.718 gallons
43.718*3.339 = $145.97

Answer:

$145.98

Step-by-step explanation:

You and some friends plan a road trip to a sunny destination that is 1705 miles away.

You drive a car that gets 39 miles per gallon.

Total gas used in the trip = [tex]\frac{1705}{39}[/tex]

= 43.7179487 ≈ 43.72 gallons

Gas costs per gallon = $3.339

Total cost to get to your destination = 43.72 × 3.339

= $145.98108 ≈ $145.98

The cost would be $145.98 to get to your destination.

A sea turtle swims at a speed of 27 kilometers per hour. A girl swims 14 decimeters per second.

1 m = 10 dm

1000 m = 1 km

How much faster does the sea turtle swim than the girl in meters per minute?

Enter your answer in the box.

____m/min

Answers

366 m/min First, convert the turtles speed to meters per minute. 27 km/h * 1000 m/km = 27000 m/h / 60 min/h = 450 m/min Now convert the girls speed to meters per minute. 14 dm/s / 10 dm/m * 60 s/min = 84 m/min Now subtract the girl's speed from the turtle's speed. 450 m/min = 84 m/min = 366 m/min

~~~~~~~~~~The answer is 366 m/min~~~~~~~~~~~~~~~~~~ First, convert the turtles speed to meters per minute. 27 km/h * 1000 m/km = 27000 m/h / 60 min/h = 450 m/min Now convert the girls speed to meters per minute. 14 dm/s / 10 dm/m * 60 s/min = 84 m/min Now subtract the girl's speed from the turtle's speed. 450 m/min = 84 m/min = 366 m/min

Which correctly describes how the graph of the inequality 6y-3x>9 is shaded

Answers

We already know that it will be a dashed line because there is no equal sign in the problem.

6y - 3x > 9
6y > 3x + 9
y > 3/6x + 9/6
y > 1/2x + 3/2

And greater then means shaded above the line.

I hope this helped! :)
Please mark as brainliest!

Answer: above the dash line!

At a baseball stadium the price for popcorn is $14.70 for 5 bags. If you wanted to buy 4 bags of popcorn, how much would it cost?

Answers

$11.77 ; Divide $14.70 by 5 to get the gist of each individual bag. Then multiply that number by 4.

Please help me solve this equation but show the steps so I can learn how to solve it.

0.25r-0.125+0.5r=0.5+r

Answers

0.25r−0.125+0.5r=0.5+r
0.25r−0.125+0.5r=0.5+r0.25r+−0.125+0.5r=0.5+r(0.25r+0.5r)+(−0.125)=r+0.50.75r+−0.125=r+0.50.75r−0.125=r+0.5
0.75r−0.125−r=r+0.5−r−0.25r−0.125=0.5.−0.25r−0.125+0.125=0.5+0.125−0.25r=0.625
−0.25r−0.25=0.625−0.25r=−2.5Answer:r=−2.5

Two trucks leave a warehouse at the same time. one travels due north at an average speed of 48 miles per hour, and the other travels due south at an average speed of 64 miles per hour. after how many hours will the two trucks be 728 miles apart?

Answers

Final answer:

When two objects are moving in opposite directions, their relative speed is the sum of their speeds. In this scenario, the trucks will be 728 miles apart after 6.5 hours of travel.

Explanation:

The problem here is essentially an application of the concept of relative speed. The two trucks are traveling in opposite directions, so you add their speeds together to get the relative speed at which they are moving apart. That results in a combined speed of 48 mph (north) + 64 mph (south) = 112 mph. Now, to find out when they will be 728 miles apart, you divide the total distance by the combined speed:

728 miles ÷ 112 mph = 6.5 hours.

So, both trucks will be 728 miles apart after 6.5 hours.

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A rectangle is twice as long as it is wide. if its length is increase by 4 cm and its width is decreased by 3 cm, the new rectangle formed has an area of 100 cm2 . find the dimensions of the original rectangle.

Answers

Now the width is w.
It's twice as long as wide, so now the length is 2w.

If the length is increased by 4 cm, the length will be 2w + 4.
The width is decreased by 3 cm, so the width will be w - 3.

The are of the new rectangle is 100 cm^2.

area = length * width

area = (2w + 4)(w - 3)

The area of the new rectangle is 100, so we get

(2w + 4)((w - 3) = 100

2w^2 - 6w + 4w - 12 = 100

2w^2 - 2w - 112 = 0

w^2 - w - 56 = 0

(w - 8)(w + 7) = 0

w - 8 = 0 or w + 7 = 0

w = 8 or w = -7

A width cannot be negative, so discard w = -7.

w = 8

The width is 8 cm.
The length is twice the width, so the length is 16 cm.

how can you figure out how many miles you are using on a united fligjts

Answers

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A drama class has a total of 47 students. The number of males is 13 more than the number of females. How many males and how many females are in the class?

Answers

the answer would be 17 girls and 30 boys

Solving Quadratic Equations (pic link)?

Answers

(x * x) /2 = 27
x^2 = 54
x = sq root(54)
x = 7.34847
x = 7.3

The number 23 is what percent of 66

Answers

15.18

66 divided by 100 =.66

.66 x 23 =15.18

23 of 66 is 34.8484%

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