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
kvasek [131]
3 years ago
10

Solve the following system of equations by the substitution method.

Mathematics
1 answer:
Dahasolnce [82]3 years ago
6 0

Answer:

Step-by-step explanation:

5x=y+6   --------- equ 1

2x-3y=4  -------- equ 2

5x - 6 = y

y = 5x - 6

substitute in equ 2

2x-3(5x - 6) =4

2x - 3*5x + 3*6 = 4

2x - 15x + 18 = 4

- 13x = 4 - 18

-13x = -14

x = -14/-13

x = 14/13

substitute  in equ 1

5*14/13 = y+6  

70/13 - 6 = y

y =  ( 70 - 78)/13

y = -8/13

You might be interested in
(05.03 LC)
never [62]

Answer:

The correct answer is x = -5

Step-by-step explanation:

All vertical lines can we written in terms of x = (a number). You can find this number in the ordered pair under the x-coordinate. In this case it is -5.

8 0
3 years ago
A rectangular picture has dimensions 2½ by 1½. It is to be enlarged so that it is still similar to the original rectangle. If th
S_A_V [24]
Original Perimeter = 2.5 + 2.5 + 1.5 + 1.5 = 8
The longer dimension is 2.5 as 2.5 > 1.5To make 2.5 into 10, we must multiply by 4For the smaller length, we must also multiply by 41.5 x 4 = 6
New Perimeter = 10 + 10 + 6 + 6 = 32
Now find the difference between the old and the new perimeter32 - 8 = 24

<em>*No units were specified - if included, remember to put them in your answer.</em>
4 0
3 years ago
Read 2 more answers
URGENT PLEASE HELP!!!! GIVING BRAINLIEST!! If you answer this correctly ill answer some of your questions you have posted! (29pt
IRINA_888 [86]

Answer: B 52

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Select True or False from each pull-down menu, depending on whether the corresponding statement is true or false.
Schach [20]

Answer:

1) FALSE

2) FALSE

3) TRUE

4) TRUE

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 1

The mean and standard deviation of a normally distributed random variable which has been standardized are one and zero, respectively.

The mean and the deviation for  the normal standard distribution are:

\mu=0, \sigma =1

So then that's FALSE.

Part 2

Using the standard normal curve, the z−score representing the 10th percentile is 1.28.

We are looking for a value a, that satisfy this:

P(X>a)=0.90   (a)

P(X   (b)  

We can find a z value that satisfy the condition with 0.10 of the area on the left and 0.90 of the area on the right it's z=-1.28. On this case P(Z<-1.28)=0.10 and P(Z>-1.28)=0.90

So that's FALSE.

Part 3

Let z1 be a z−score that is unknown but identifiable by position and area. If the symmetrical area between −z1 and +z1 is 0.9544, the value of z1 is 2.0

If we find this probability:

P(-2.0< Z

So on this case we can approximate to 0.9544. And that's TRUE.

Part 4

Using the standard normal curve, the z−score representing the 75th percentile is 0.67.

We are looking for a value a, that satisfy this:

P(X>a)=0.25   (a)

P(X   (b)  

We can find a z value that satisfy the condition with 0.75 of the area on the left and 0.25 of the area on the right it's z=0.67. On this case P(Z<0.67)=0.75 and P(Z>0.67)=0.25

So that's TRUE.

3 0
3 years ago
Yea uh... mmmmm... may someone help me with this. Thank you so very much! :D
kobusy [5.1K]
What’s the question?
5 0
3 years ago
Other questions:
  • What is the solution to the equation 4x = 44?<br><br> x = 4<br> x = 10<br> x = 11<br> x = 40
    13·2 answers
  • What is the value of x?
    5·1 answer
  • Find the volume of the sphere with a radius of 2 Either enter an exact answer in terms of pi or use 3.14 for pi and round your f
    5·1 answer
  • What is the theoretical probability of rolling a 3 or a 4 on a fair six sided die?
    14·1 answer
  • Solve for X<br><br> WILL GUVE BRAINIEST ON THE FIRST ANSWER <br><br> 15POINTS
    11·1 answer
  • PLS HELP ASAP GIVE BRAINLIEST <br> Two photos look at both
    12·2 answers
  • 100 + 5 x 4 + 4^3<br><br><br><br> Sndbdnd
    9·2 answers
  • Suppose a car uses one gallon of gasoline for
    11·2 answers
  • Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
    15·1 answer
  • Elena and Lin are training for a race. Elena runs her mile a constant speed of 7.5 miles per hour.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!