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
Ivenika [448]
3 years ago
11

-4x=30-2y , - 15 = - 2y + 11x Which the first step determining the given ordered pair solution?A. Replace x with 13 and y with -

1 in each equation B. Solve each equation for a variable C. Replace each variable in the first equation with -1 and each variable in the second equation with 13. D. Replace x with -1 and y with 13 in each equation. Is (-1,13) a solution of the system? Yes or no
Mathematics
1 answer:
Andru [333]3 years ago
4 0

Answer:

B. Solve each equation for a variable

Is (-1,13) a solution of the system:  Yes it is x =1, y= 13

Step-by-step explanation:

-4x=30-2y

- 15 = - 2y + 11x

-4x=30-2y

-2y+4y = -30-------------------i

- 2y + 11x=  - 15 ---------------ii

make x the subject of formula in equ i

-4x=30-2y

x= (30-2y)/-4

insert x= (30-2y)/-4 in equ ii

- 2y + 11x=  - 15

-2y+ 11((30-2y)/-4)= -15

-2y+(330-22y)/4 = -15

-8y+330-22y/4 = -15

-8y-22y+330/4= -15

cross multiply

-30y+330 = 4x-15 = -60

-30y = -60-330

-30y =--390

y= -390/-30 = 13

if y = 13

x = (30-2y)/-4 = (30-2x13)/-4 = (30-26)/4 = 4/4 = 1

x=1 , y=13

You might be interested in
Name three three decimals between 16.4 and 1
lora16 [44]
10.2
and
5.6
and
7.9

Hope this helped :)
7 0
4 years ago
Read 2 more answers
Solve for m:<br> 2r= m/r <br><br><br> m = 2r<br> m = 2r squared by 2<br> m=r<br> m = 2
Bad White [126]
Solution

Switch sides so that m is on the left side

m/r = 2r

Them multiply both sides by r

mr/r = 2rr

Now simplify the equation

m = 2r^2

Therefore the equation evaluates to
m = 2r squared by 2
6 0
2 years ago
X + 3/2 = 3/4 (x - 1/2)
Iteru [2.4K]

this would be your answer, <em>x = 1 - 15/2.</em>

Thanks,

<em>Deku ❤</em>

8 0
3 years ago
Choose True or False for each statement.
Margaret [11]

Answer:

1. True

2. False

3. False

4. True

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Find a point on the graph of the function y=f(x)+3
Fudgin [204]
In the general case, it is (x, y+3), where y = f(x).
5 0
3 years ago
Other questions:
  • Is (y^m) = (y^n) a true statement
    6·1 answer
  • Plz help ill give brainlist to you
    5·1 answer
  • Beulah used 3/5 pounds of dough, 3/4 pound of sugar, &amp; 2/3 pounds of sprinkles to make donuts. How many pounds of donuts did
    13·1 answer
  • PLEASE HELP! THANKS!
    11·2 answers
  • You want to to buy the PlayStation 5 and it is listed as $449.99 in all the stores
    9·1 answer
  • Can you please help will give brainliest please
    14·2 answers
  • Please help!! I'm very confused
    11·2 answers
  • I feel hurt so bad for some reason
    12·2 answers
  • 10a+3+10 Ixl Math Question
    12·2 answers
  • How do you know if a guy likes you especially if he's shy? fre.e points basically
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!