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
PilotLPTM [1.2K]
3 years ago
15

Solve each system using elimination. − 5 = −10 − + = 6

Mathematics
1 answer:
Maksim231197 [3]3 years ago
5 0

The values of (x, y) are (-5, 1), if the equations x-5y=-10 and -x+y=6 are solved by elimination method.

Step-by-step explanation:

The given is,

                      x-5y=-10................................(1)

                    -x+y=6.....................................(2)

Step:1

           Equation (2) is multiplied by -1 ( Eqn (2) × -1 )

                      x-y=-6..................................(3)

Step:2

         Substrate the equation (1) and equation (3),

                                      x-5y=-10

                                        x-y=-6

          ( - )

         After the Subtraction equation becomes,

                   (x-x)+(-5y+y)=(-10+6)

                                (0)+(-4y)=(-4)

                                            -4y=-4

                                                 y=1

Step:3

           By using y value find value of x,

                                  x-5y=-10

                             x-(5)(1)=-10

                                           x=-10+5

                                           x=-5

Step:4

           Check for solution,

                                  -x+y=6

                              -(-5)+1=6

                                             6=6

           Both sides are equal so answer is corrected

Result:

         The values of (x, y) are (-5, 1), if the equations x-5y=-10 and -x+y=6 are solved by elimination method.

You might be interested in
8 - 1/3x = 16 <br> PLEASE ANSWER ITS DUE TOMORROW
Ilya [14]
X = 8/(-1/3) therefore the answer is -24
5 0
2 years ago
Help! Please answer this! Giving all my points away! NO LINKS! Thank you!
Zanzabum

Answer:

13

Step-by-step explanation:

200-187=13

8 0
3 years ago
What is the range of f(x) = 3x + 9?
Lera25 [3.4K]
From the given options we can think that x is
in the exponent of 3.
So, the given function is actually f(x) = 3^x +9
Now, we need to find the range of given
function.
We can see that first term is and exponential
term 3^x and second term is 9
We know that 3^x will always be greater than
O.
Therefore, 3^x +9 would always be greater
than 9.
Therefore, range would be y>9.
So, the correct option is B) (y | y > 9}.
5 0
2 years ago
A population of values has a normal distribution with μ=204.9μ=204.9 and σ=81.9σ=81.9. You intend to draw a random sample of siz
marin [14]

Answer:

7. μ=204.9 and σ=5.4968

8. μ=75.9 and σ=0.7136

9. p=0.9452

Step-by-step explanation:

7. - Given that the population mean =204.9 and the standard deviation is 81.90 and the sample size n=222.

-The sample mean,\mu_xis calculated as:

\mu_x=\mu=204.9, \mu_x=sample \ mean

-The standard deviation,\sigma_x is calculated as:

\sigma_x=\frac{\sigma}{\sqrt{n}}\\\\=\frac{81.9}{\sqrt{222}}\\\\=5.4968

8. For a random variable X.

-Given a X's population mean is 75.9, standard deviation is 9.6 and a sample size of 181

-#The sample mean,\mu_x is calculated as:

\mu_x=\mu\\\\=75.9

#The sample standard deviation is calculated as follows:

\sigma_x=\frac{\sigma}{\sqrt{n}}\\\\=\frac{9.6}{\sqrt{181}}\\\\=0.7136

9. Given the population mean, μ=135.7 and σ=88 and n=59

#We calculate the sample mean;

\mu_x=\mu=135.7

#Sample standard deviation:

\sigma_x=\frac{\sigma}{\sqrt{n}}\\\\=\frac{88}{\sqrt{59}}\\\\=11.4566

#The sample size, n=59 is at least 30, so we apply Central Limit Theorem:

P(\bar X>117.4)=P(Z>\frac{117.4-\mu_{\bar x}}{\sigma_x})\\\\=P(Z>\frac{117.4-135.7}{11.4566})\\\\=P(Z>-1.5973)\\\\=1-0.05480 \\\\=0.9452

Hence, the probability of a random sample's mean being greater than 117.4 is 0.9452

7 0
3 years ago
On a platter of chicken wings, there are mild wings and hot wings. In a representative sample of 15 chicken​ wings, there are 8
natulia [17]

Answer:

Step-by-step explanation

15x2=30 so 30=16

30x2=60 so 60=32

60+30=90 so 90=48

4 0
2 years ago
Read 2 more answers
Other questions:
  • Melissa runs a dog-boarding service. The cost to board a dog for one day is $25.00. If the same dog owner wants to board their d
    11·2 answers
  • VERY IMPORTANT I NEED HELP!!!
    12·1 answer
  • Cindy measured and recorded the temperature of a liquid for an experiment. She used a poorly calibrated thermometer and noted th
    13·1 answer
  • The expression d/t can be used to find the average speed of an object that travels a distance d in time t. What is a car's avera
    14·1 answer
  • What number is between.....
    5·2 answers
  • Can someone help idk what this is
    11·1 answer
  • Whats 5678 divided by 45.7​
    5·2 answers
  • What are the following solutions to the inequality -7x+14&gt;-3x-6 select all that apply
    7·1 answer
  • 18. Which one of the following mathematical statements is true?
    7·2 answers
  • -11x-4&gt;-15
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!