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
Fynjy0 [20]
3 years ago
8

Use the substitution method to solve the system of equations

Mathematics
1 answer:
Sergeeva-Olga [200]3 years ago
8 0

Answer:

x=1/4

y = -2

(1/4, -2)

b

Step-by-step explanation:

4x -y =3

y =-8x

substitute y =-8x into the first equation.  Everywhere you see y put 8x

4x -y =3

4x - (-8x) =3

4x+8x=3

combine like terms

12x = 3

divide by 12

12x/12x = 3 /12

x = 1/4

now we need to find y

y = -8x

y = -8 * 1/4

y = -2

You might be interested in
Explain the difference between four times the sum of X and Y and the sum of four times X and Y
tester [92]

Answer:

Condition 1:

four times the sum of X and Y = 4(X + Y)

Condition 2:

the sum of four times X and Y=  4X + Y

  • Difference:

        In condition 1, both the variables are first added and then multiplied by        four. This can be simplified as:

                   4X +4Y

I condition 2, only the variable X is multiplied with 4 and then added to Y.

  • Conclusion:

         With positive integers, condition 1 will always give a greater value.

         With negative integers, condition 2 will have greater value.

I hope it will help you!

6 0
3 years ago
At noon, the temperature is 76°F.
sergiy2304 [10]

Answer:

25%

Step-by-step explanation:

  % Change = Change ÷ Original × 100

   % Change =  19 ÷ 76 ×  100

    % Change =  .25 × 100

     % Change = 25

6 0
3 years ago
The exact vaule of cos(247.5 degrees)
Leni [432]
cos(247.5 deg)=cos( \frac{495deg}{2})
                         =  - \sqrt{ \frac{1+cos(495deg)}{2} }  
                         = -\sqrt{ \frac{1- \frac{ \sqrt{2} }{2} }{2} } 
                         =  \frac{ \sqrt{2- \sqrt{2} } }{2}
8 0
3 years ago
Mike wants to buy a scooter worth R10000 but cannot afford so he opts for the hire purchase agreement which requires a 13% depos
nlexa [21]

Answer: I think the answer is A

Step-by-step explanation:

6 0
3 years ago
Suppose the cpi was 110 last year and is 121 this year. instructions: in part a, enter your answer as a whole number. in part b,
nexus9112 [7]
<span>To calculate the change in CPI we need to do a % change formula. (New - Old) / (Old) = n. (121 - 110) / 110 = .10. This is equal to a 10% change in CPI. To confirm the answer, do, (Old) * (1+n) = New CPI. 110*(1+.10) = 121. It equals so it is right!</span>
8 0
3 years ago
Other questions:
  • Come hither for a brainliest
    13·2 answers
  • Question in screen shot
    13·2 answers
  • A car is traveling at 35 mph. If its tires have a diameter of 27 inches, how fast are the car's tires turning? Express the answe
    15·1 answer
  • What does b= and c= and d=
    7·1 answer
  • Express .32 as a fraction
    7·1 answer
  • Someone help me this is so hard
    6·2 answers
  • A gym employee is paid monthly. After working for three months, he had earned $4,500. To
    14·1 answer
  • PLEASE HELP
    15·1 answer
  • 20$ - 5$ = 15$ 15$/2.50 = 6 in graph form
    5·1 answer
  • ramesh took a loan of rs 50000 from urmila at the rate of 10%p.a. if he paid half of the principal and all the interest at the e
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!