1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kirza4 [7]
3 years ago
14

Solve for w k=2b-5w/3k

Mathematics
2 answers:
nlexa [21]3 years ago
7 0
k = \frac{2b - 5w}{3k}
3k^{2} = 2b - 5w
3k^{2} + 5w = 2b
5w = 2b - 3k^{2}
w = \frac{2}{5}b - \frac{3}{5}k^{2}
Westkost [7]3 years ago
7 0

Answer:

b = \frac{2b - 3k^{2} }{5}

Step-by-step explanation:

To solve for w in this equation;

k = \frac{2b - 5w}{3k}

This implies we have to make w the subject of the formula.

To make w subject of the formula, first we cross multiply.

3k  × k  =  2b  -  5w

3k²  =   2b   -5w

Now we will subtract  2b from both- side of the equation

3k²   - 2b  = -5w

we want to make the right hand side of the equation positive, to do that , we will just multiply through by minus sign.  The equation becomes;

-3k²   +   2b   = 5w

We can rearrange the equation;

2b -  3k²   =    5w

5w  =  2b  - 3k²

Then we will now divide both-side of the equation by 5

\frac{5w}{5}  =    \frac{2b - 3k^{2} }{5}

In the left side of the equation, the 5 at the  numerator will cancel out the 5 at the denominator.

Hence;

w  =   \frac{2b - 3k^{2} }{5}

You might be interested in
Use the line plot below to
Alinara [238K]
1. There were 11 yards mowed. Each yard is represented by an x on the line plot.
2. The most amount of gas used on any one yard was 5/8 of a gallon. The least amount of gas used was 1/8 of a gallon. The difference is (5/8)-(1/8)= (4/8)= 1/2 gallon
7 0
3 years ago
An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and
egoroff_w [7]

Answer:

a) P(140

P(0.036

P(0.036

b) P(140< \bar X

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Part a

Let X the random variable that represent the weights of a population, and for this case we know the distribution for X is given by:

X \sim N(139,28.1)  

Where \mu=139 and \sigma=28.1

We are interested on this probability

P(140

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(140

And we can find this probability like this:

P(0.036

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(0.036

Part b

For this case we select a sample size of n =32. Since the distribution for X is normal then the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu=139, \frac{\sigma}{\sqrt{n}}=\frac{28.1}{\sqrt{32}}=4.97)

And the new z score would be:

Z=\frac{\bar X -\mu}{\sigma_{\bar x}}

P(140< \bar X

P(140< \bar X

5 0
3 years ago
3x – 2y = 17 <br> –2x – 5y = 14 <br> Solve using Elimination Please show work
OleMash [197]

Answer:

The solution is x=3 , y=-4 or (3,-4)

Step-by-step explanation:

Given equations (1 and 2) are:

3x- 2y = 17\\-2x -5y = 14

To solve a system of equation with elimination method, the co-efficients of one of the variables has to be equated and then the equations are added or subtracted to get an equation in one variable.

Multiplying equation 1 by 2:

2(3x-2y) = 2*17\\6x-4y = 34\ \ \ \ \ Eqn\ 3

Multiplying equation 2 by 3

3(-2x-5y) = 3*14\\-6x-15y = 42\ \ \ \ Eqn\ 4

Adding equation 3 and 4

(6x-4y) + (-6x-15y) = 34+42\\6x-4y-6x-15y = 76\\-19y = 76\\\frac{-19y}{-19} = \frac{76}{-19}\\y = -4\\

Putting y = -4 in equation 1

3x-2(-4) = 17\\3x+8 = 17\\3x = 17-8\\3x = 9\\\frac{3x}{3} = \frac{9}{3}\\x = 3

Hence,

The solution is x=3 , y=-4 or (3,-4)

3 0
3 years ago
PLS PLS PLS I NEED HELP <br> Given * inserted picture* find
Gala2k [10]

Answer:

SinA=5/1 3 CosA=12/13 tanA=5/12. SinC=12/13 CosC=5/13 and tanC=12/5

Step-by-step explanation:

Basically find the third side by Pythagorean theorem which would get you 13. So 13 is the hypotenuse. Remember these 3 formulas. Sin=Opposite/Hypotenuse Cos=Adjacent/hypotenuse and Tan=opposite/Adjacent. So for Sin a the opposite side to angle A is 5. The hypotenuse is always the same which would be 13. So Sin a is 5/13. For cos the side adjacent would be 12. So it is 12/13. *Note Hypotenuse cannot be considered the adjacent.

4 0
3 years ago
Read 2 more answers
Help me please a girl neeeds help
konstantin123 [22]

Answer: B) reflection over the y-axis

6 0
3 years ago
Other questions:
  • 95% of 120 games played
    8·1 answer
  • What is the change in temperature from -8°F to 14°F?
    13·2 answers
  • Can you show me the workings : Find the product 1/6 x 1/5=
    8·1 answer
  • Help please, properties of congruence
    11·1 answer
  • You are scheduled to receive $38,000 in two yeara. when you receive it, you will invest it for 10 more years at 6.0 percent per
    13·1 answer
  • When dividing one number into another ,repeating decimals are the result of having no reminder. True or false
    9·1 answer
  • Find the missing number: 2016 · 199 = 2016·? +2016 · 98 Pls tell how you did it as well
    13·2 answers
  • Lamont and Carmela both wrote an expression to show the area of the shaded region.
    5·1 answer
  • An airplane measures the angle of depression to a tree to be 15 degree it measures that it is 2 miles off the ground how far is
    12·1 answer
  • 50 POINTS Pls correct answer.What is the number of solutions in this system?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!