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
swat32
3 years ago
11

How to do 2x-8=7y and 6x-9y=-4

Mathematics
2 answers:
Galina-37 [17]3 years ago
7 0

Hello from MrBillDoesMath!

Answer:

x = -25/6

y = -7/3

Discussion:

2x - 8 = 7y                    => multiply both sides by 3

6x - 24 = 21y    

Subtract this from the second equation:

  6x -9y= -4

  6x -24 = 21y

-   --------------------------

0x -9y + 24 = -4 - 21y              =>   add 21y to both sides

-9y + 21y + 24 = -4                    =>  add -24 to both sides

-9y +21y + (24 - 24) = -4 -24     =>

12y = - 28                                   =>

y = -28/12

y = -7/3

Solving for x,  

2x - 8 = 7(-7/3)           =>

2x - 8 = -49/3            => add 8 = 24/3 to both sides

2x = -49/3 + 24/3      =>

2x = -25/3                 => divide both sides by 2

x = -25/6

Thank you,

MrB

disa [49]3 years ago
6 0

Answer:

dsfsd

Step-by-step explanation:

fsfddddddddds

You might be interested in
A collection of quarters, dimes, and nickels is worth $13.30. If the ratio of quarters to
RideAnS [48]

Answer:

105

Step-by-step explanation:

35 quarters ($8.75)

21 dimes ($2.10)

49 nickels ($2.45)

7 0
3 years ago
What is the constant term in the polynomial 2x3 - 8x2 + 5x -28
cricket20 [7]

Answer:

Constant Term

The term in a simplified algebraic expression or equation which contains no variable(s). If there is no such term, the constant term is 0.

 

Example:   –5 is the constant term in p(x) = 2x3 – 4x2 + 9x – 5

 

6 0
3 years ago
Amanda, Bryan, and Carl are about to compete in 100
Sveta_85 [38]

9514 1404 393

Answer:

  6

Step-by-step explanation:

Any of the three can be in first place.

Any of the remaining two can be in 2nd place.

The remaining swimmer will be in 3rd place.

There are 3 × 2 × 1 = 6 possible orderings of the swimmers.

7 0
3 years ago
HELP ME PLEASE!!!!!!!!!!!!!!!!
Pepsi [2]

The ordered pairs of the solution to the system of equation are [(3, 6), (-3, 18)]

<h3>System of equations</h3>

Given the following system of equations expressed as:

f(x) = x² - 2x + 3 and f(x) = -2x + 12

Since they are both function of x, hence;

x² - 2x + 3 = -2x + 12

x² - 2x + 3 + 2x - 12 = 0

x² - 9 = 0

x² = 9

x = ±√9

x = ±3

If x = 3

f(x) = -2(3) + 12

f(x) = 6

If x = -3

f(x) = -2(-3) + 12

f(x) =18

Hence the ordered pairs of the solution to the system of equation are [(3, 6), (-3, 18)]

Learn more on system of equation here: brainly.com/question/14323743

#SPJ1

6 0
2 years ago
Giving Brainiest to who gets it right please hurry though.
kramer
1. 2.50x + 5 = C
2.50(4.1) + 5 = C
$15.25

2. 15.25(1.15)
$17.54

3 B, I believe but dont quote me.

4. 206 / 60 + 30
236 minutes
8 0
3 years ago
Other questions:
  • Find the simple interest paid to the nearest cent for each loan, interest rate, and time. $500, 12%, 18 months
    12·2 answers
  • PLS HELP!! If f(x) = 2x^2-4x and g(x) =5-2x, evaluate f(x)-g(x) for x=5
    7·1 answer
  • Square root of 82 rounded to 0.05
    9·1 answer
  • Which is the true about the function relationships show in the graph?
    15·1 answer
  • Shawn missed 15% of the problems on his math test if he missed six problems how many problems were on the test
    8·1 answer
  • Can somebody plz help?
    10·2 answers
  • PLEASE ANSWER GIVING 30 POINTS
    12·2 answers
  • Which equation represents a line which is perpendicular to the line x – 2y = -14?
    5·1 answer
  • look at pic 10 pts will mark brainilest
    11·1 answer
  • Fifteen cards numbered 1-15 are placed in a hat. What is the probability that the card has a multiple of 3 on it, given that the
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!