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
lozanna [386]
3 years ago
7

{2x+7y=2 {y= -2x-1 Am I right?

Mathematics
1 answer:
vampirchik [111]3 years ago
6 0
<span>Okay so we have. 2x + 7y = 2 y = - 2x - 1 Rearranging the second expression we have y + 2x = -1; So 2x + y = -1 2x + 7y = 2 2x + y = -1 Subtracting both eqns we have (2x - 2x) + (7y-y) = 2-(-1). So we have 6y =3; y = 0.5 Substituting into second eqn we have 2x + 0.5 = -1. 2x = -1-0.5=-1.5. Hence x = --0.75. So we have to check for consistency if we would confirm the expression. So Substiting values of x and y into the first eqn we have 2(-0.75) + 7(0.5) = -1.5 + 3.5 =2. And into the second eqn we have 2(-0.75) + 0.5 =-1.5 + 0.5 =-1. So, yes! You are dead right.</span>
You might be interested in
Pepper jackie has 5.8
vesna_86 [32]

Answer:

Pepper Jackie still has 5.8

Step-by-step explanation:

If this is a english problem instead of a math problem to correct the sentence it would be       Pepper Jackie has 5.8

4 0
3 years ago
Helpppppppppp<br> Urgenttttt<br> Pleaseeeee!
Alika [10]

Answer:

The first set is a set of linear equations.

The way to figure this out is pretty easy. If you want to see it visually, go search up desmos graphing calculator and put in these equations.

A linear equation is a function that has a constant slope, meaning that the rate it increases or decreases will never change. The first one is a set of linear equations because it is 2 equations with constant slopes, meaning that the slopes will never change no matter what y and x are.

The second set is not, because while the first equation is linear, the second is an inequality. While it is a straight line, it doesn't count as a linear equation.

The third set, both equations have exponents on the x, which means that the slope will change depending on x. This means that both of these are not linear equations.

The only set that is a linear set is the one that has only linear equations.

3 0
1 year ago
The graph shows the amount of money paid when purchasing bags of candy at the zoo: A graph is shown. The x-axis is labeled from
Zina [86]
I'm positive that it is one 

7 0
3 years ago
Read 2 more answers
Please Help Asap !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
shepuryov [24]

D. The combined expenses In Year 3 and 4 were $300,000 more than the combined of Year 3 and 4

6 0
3 years ago
Vertex of y=5x^2-10x+1
kirill [66]
Convert to vertex form:-

y = 5(x^2 - 2x) + 1

y = 5[(x - 1)^2 - 1] + 1

y = 5(x - 1)^2  - 4


vertex is (1, -4)
4 0
3 years ago
Other questions:
  • An experiment was conducted to compare the wearing qualities of three types of paint (A, B, and C) when subjected to the abrasiv
    13·1 answer
  • Write the equation of a line with a slope of −2 and a y-intercept of 5. (2 points) Question 1 options: 1) −2x + y = 5 2) 2x − y
    7·1 answer
  • 8t – 13t + 10 (t – 2) = 34
    11·1 answer
  • How long is a high school football game on average? I wanted to know about how long a high school football game lasts from start
    5·1 answer
  • What is the slope of (-13,8) and (3,12)
    10·1 answer
  • Shari and Ana are playing games at an arcade. Shari has $37.50 and is playing $0.50 games. Ana has $42.75 and is playing $0.75 g
    12·2 answers
  • An urn contains 17 white balls and 18 red balls. A sample of four balls is selected at random from the urn. What is the probabil
    6·1 answer
  • At a carnival, $8 buys 15 ride tickets. Brian is going to spend $96 on tickets. How many ride tickets will he be able to buy
    15·2 answers
  • What is the greatest common factor of 36 and 48?
    14·2 answers
  • Which expression has a value of 3?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!