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
nasty-shy [4]
3 years ago
13

5a-2b=c solve for a

Mathematics
2 answers:
erica [24]3 years ago
3 0
When trying to find value of variable, always try to get it alone.

5a-2b=c

Add 2b for both sides.

5a=2b+c

Divide by 5

Answer: 2b+c/5
adelina 88 [10]3 years ago
3 0
5a + -2b + 2b = 2b +c 
-2b + 2b = 0 
5a + 0 = 2b + c 
5a = 2b + c 
a = 0.4b = 0.2c 
simplified 
a = 0.4b + 0.2c
You might be interested in
Solve the equation x2-16x+54=0
kari74 [83]

Answer:

x1 = 8+√10, x2 = 8 -√10

Step-by-step explanation:

x² - 16x + 54 = 0

x = \frac{-b +/-\sqrt{b^{2} -4ac} }{2a} \\x = \frac{-(-16)+/-\sqrt{(-16)^{2} -4*1*54} }{2*1} \\\\\\x = \frac{16+/-\sqrt{(40)} }{2*1} = 8+/-\sqrt{10} \\\\x_{1} = 8+\sqrt{10}\\\\x_{2} =8-\sqrt{10}

7 0
2 years ago
Read 2 more answers
Adam buys a car for £15060 which depreciates in value at a rate of 1.5 per year. Work out how much Adam's car will be worth in 9
Step2247 [10]

Answer: £13026.90

Step-by-step explanation:

1.5% of £15060 = 225.90

225.90 x 9 = 2033.10

15060 - 2033.10 = 13026.90

hope this helps ;)

4 0
2 years ago
Read 2 more answers
SAT scores are normed so that, in any year, the mean of the verbal or math test should be 500 and the standard deviation 100. as
vovangra [49]

Answer:

a) P(X>625)=P(\frac{X-\mu}{\sigma}>\frac{625-\mu}{\sigma})=P(Z>\frac{625-500}{100})=P(Z>1.25)

P(Z>1.25)=1-P(Z

b) P(400

P(-1

P(-1

c) z=-0.842

And if we solve for a we got

a=500 -0.842*100=415.8

So the value of height that separates the bottom 20% of data from the top 80% is 415.8.  

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 SAT scores of a population, and for this case we know the distribution for X is given by:

X \sim N(500,100)  

Where \mu=500 and \sigma=100

We are interested on this probability

P(X>625)

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(X>625)=P(\frac{X-\mu}{\sigma}>\frac{625-\mu}{\sigma})=P(Z>\frac{625-500}{100})=P(Z>1.25)

And we can find this probability using the complement rule and with the normal standard table or excel:

P(Z>1.25)=1-P(Z

Part b

We are interested on this probability

P(400

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(400

And we can find this probability with this difference:

P(-1

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

P(-1

Part c

For this part we want to find a value a, such that we satisfy this condition:

P(X>a)=0.8   (a)

P(X   (b)

Both conditions are equivalent on this case. We can use the z score again in order to find the value a.  

As we can see on the figure attached the z value that satisfy the condition with 0.2 of the area on the left and 0.8 of the area on the right it's z=-0.842. On this case P(Z<-0.842)=0.2 and P(Z>-0.842)=0.8

If we use condition (b) from previous we have this:

P(X  

P(z

But we know which value of z satisfy the previous equation so then we can do this:

z=-0.842

And if we solve for a we got

a=500 -0.842*100=415.8

So the value of height that separates the bottom 20% of data from the top 80% is 415.8.  

8 0
2 years ago
A student flips a coin 58 times. How many times can she expect the coin to land on heads.
goldenfox [79]
Well there’s two sides of a coin
so divide 58 by 2 to get 29
5 0
2 years ago
Read 2 more answers
The graph shows the location of P in point hour. Point are is on the Y axis and has the same Y coordinate of point PPoint Q is
sergejj [24]

Answer:

I cant understand read ur lesson and ask help from ur teacher

#CarryOnLearning

6 0
2 years ago
Other questions:
  • Someone solve and show your work. Thanks! I’m giving brainliest.
    6·1 answer
  • in her garden pam plants the tomato seeds inches below the ground after one mouth the tomato plants has grown a total of inches
    13·1 answer
  • Please help thank you so much
    8·1 answer
  • 1. Taylor has 10 songs on her phone's playlist. The playlist
    6·1 answer
  • Simplify (write without absolute value sign): |x+3|, if x&gt;2
    11·1 answer
  • Tori earned $62.86 as a bonus from her job. She decided to buy as many CDs as possible since they were on sale for $8.80 each. E
    15·1 answer
  • Aiden ran half as much on Tuesday than he did on Thursday how many miles did he run if Thursday was four thirds of a mile
    5·1 answer
  • Indicate whether the lines are parallel, perpendicular, or neither. Justify your answer. X=4 and Y=-2
    6·1 answer
  • The perimeter of a triangle is
    13·1 answer
  • Mr. Osmond bought a computer that cost $2,500. How much did he pay for the computer if the sales tax rate was 7 present
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!