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
mixas84 [53]
3 years ago
7

Solve the system of linear equations by substitution. 5x+2y=9 y-x= 8

Mathematics
2 answers:
mylen [45]3 years ago
6 0
  1. From equation 2(y-x=8)
  2. y=8+x.....name equation 3
  3. Sub equation 3 in equation 1
  4. 5x+2(8+x)-9=0 (Transpose the 9)
  5. 5x+16+2x-9=0 (Group the like terms)
  6. 5x+2x+16-9
  7. 7x+7
  8. x=7+7=14
  9. x=14

Varvara68 [4.7K]3 years ago
5 0

Answer:

x=1

y=9

Step-by-step explanation:

5x+2y=9 , y-x= 8

y=8+x

put 8+ x anywhere we see y

5x+2(8+x)=9

5x+16+2x=9

5x+2x+16=9

7x+16=9

16-9=7x

7=7x

divide both sides by 7

x=1

if x=1, then y-1=8

y=8+1

y=9

You might be interested in
Find the measure of angle x in the figure below<br>67 61<br>у<br>X<br>67​
kondor19780726 [428]

Answer: y67

Step-by-step explanation:5n − 19 + n + 7 = 144 − 6n

6n − 12 = 144 − 6n

12n = 156

n = 13

m∠z = (144−6n)°

m∠z = (144−6×13)°

m∠z = y67

3 0
3 years ago
Read 2 more answers
What does b= in mathematics
ziro4ka [17]

bisector. Base. In geometry, the base of a shape is the side (usually the bottom) that forms a right (90 degree) angle with the height of the object. Biannual.

7 0
3 years ago
You buy a bunch of snacks from the grocery story that cost $9.50. You also have a 10% off your total purchase coupon. The tax ra
Bond [772]

Answer:

889 or 900

Step-by-step explanation:

I found 4 percent of 9.50 and added it, then found 10 percent and added it.

4 0
3 years ago
Please help me right away. There are 2 problems.
koban [17]

For #6;

We know that there are 46% male students and 30% of them are seniors. This means that we have to assume that 30% of the male students are seniors and that 30% of the female students are seniors. Taking 30% of 46% gives us 13.8%.

For #7;

We are looking for the possibility that we choose a junior student (22%) or a sophomore student (28%). This adds up to 50% (22%+28% = 50%). That is out answer.

7 0
3 years ago
Help me pls!<br> find x and hurry im under a time limit
Licemer1 [7]

Answer:

x = 13

Step-by-step explanation:

Using the 48° angle, we find out that the angle opposite of angle y° is also 48° according to the corresponding angles theorem. Then, you would subtract 48 from 180 to get the degrees of angle y, which would be 132°. Next, you need to subtract 132 from 180 to get the angle measure of the (5x - 17)° angle. (180 - 132 = 48) Once you have done that, all you have to do now is figure out what value of x makes it equal to the degree measure you found by subtracting 132 from 180. I tried it with x = 13, which came out as a correct answer. So x must be 13.

(5x - 17)°

(5(13) - 17)°

(65 - 17)°

(48)°

48°

The angle equals 48° and x equals 13.

4 0
2 years ago
Read 2 more answers
Other questions:
  • The perimeter of a rectangle is 60. The length is twice the width. Find the length and width.
    11·1 answer
  • What is the solution to the equation 6x+2=9x-1
    8·1 answer
  • Weston completed a hypothesis test and found that he could not reject the null hypothesis. Which of the following is a valid rea
    10·2 answers
  • Rico has $87 in his checking account and Darius asked to borrow $34 to buy a shirt. Rico wants to give him the money and buy a s
    10·1 answer
  • HELP PLSS WHEHHEHEHE PLSSSSS
    13·1 answer
  • For spirit week at a local high school, students were encouraged to wear their school colors of green and white. 2,400 students
    12·1 answer
  • katy desea alquilar un barca y gastar por menos $54. El barco cuesta $7 por hora y katy tiene un cupom de descuento de $9 dolare
    5·1 answer
  • How is 0.623 expressed as a percentage?
    14·2 answers
  • Use long division to determine the decimal equivalent of 2/3
    14·1 answer
  • Find the output, b, when the input, a, is 6.<br> b = -1-7a<br> b=___
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!