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
ololo11 [35]
3 years ago
6

What was Dimitri's mistake? He mixed up the coordinates of the ordered pair when Substituting it into the equations 7x+9y=-4 and

5x-2y=6
Mathematics
1 answer:
seropon [69]3 years ago
7 0

Answer:

He made a mistake in his calculations when simplifying 5x - 2y

Step-by-step explanation:

Given

The coordinate pair

(x,y) = (2,-2)

The equations

7x + 9y = ?

5x - 2y = ?

Dimitri's Solution

Equation\ 1: 7x + 9y = -4.

7(2) + 9 (-2) = -4.

14 + (-18) = -4.

-4 = -4.

Equation\ 2: 5x -2y = 6.

5(2) - 2 (-2) = 6.

10 - 4 = 6.

6 = 6.

Required

Identify Dimitri’s mistake

In the first equation, Dimitri made no mistake.

However, he made a mistake when simplifying the second equation.

We have:

5x - 2y

and

(x,y) = (2,-2)

Substitute x = 2 and y = -2

So, we have:

5(2) -2(-2)

Open bracket

10 +4

Finally, we have:

14

You might be interested in
706,421 rounded to the neares thousand
ella [17]
706,421 rounded to the nearest thousand is 706,000 because the 421 is less than 500 so the 6 would remain a 6.
3 0
3 years ago
What is the value of the expression 3x-8y when x=10 and y=2?
Greeley [361]

Answer:

14

Step-by-step explanation:

3x-8y

(3*10)-(8*2)

30-16

14

7 0
3 years ago
Read 2 more answers
A rabbit population doubles every 4 weeks. There are currently five rabbits in a restricted area. If t represents the time, in w
Mumz [18]
98 days = (98 ⁄ 7) weeks = 14 weeks 

<span>Po = initial population = 5 </span>

<span>Ƭ = doubling time in weeks </span>

<span>t = elapsed time in weeks </span>

<span>P{t} = population after "t" weeks </span>


<span>    P{t} = (Po)•2^(t ⁄ Ƭ) </span>

<span>    P{t} = (Po)•2^(t ⁄ 4) </span>

<span>    P{t} = 5•2^(t ⁄ 4) </span>

<span>    P{14} = (5)•2^(14 ⁄ 4)   …   t = 14 weeks = 98 days </span>

<span>    P{14} = 56   …   population after 14 weeks</span>
6 0
3 years ago
if f(x)=3/x+2-sqrtx-3 complete the following statement. The domain for f(x) is all real numbers___ than or equal to 3
Stolb23 [73]
The domain of the function is the set of all the values of x that would allow the function to have real values. Since the radicand is x - 3, the value of x cannot be less than 3 because that would make the value of sqrt (x - 3) an imaginary number. Thus, the domain should be all numbers GREATER than or equal to 3.
6 0
3 years ago
Find the domain and range for the function graphed below ​
Nana76 [90]

Answer:

Domain: 3, 2, 1, 0, -1 , -2 , -3

Range: 5 , 4 , 3 , 2 , 1 , 0 , -1 , -2

Step-by-step explanation:

The domain values are all of the x-values, and the range value are all of the y-values. Domain ad range can also be know as input and output.

3 0
3 years ago
Other questions:
  • What are different ways to add two rational numbers and get a negative
    14·1 answer
  • 3x + 3<br> X + 8<br> What is the perimeter of each polygon?
    5·1 answer
  • Ralph Jordan recently bought a new lawnmower for $228.00. If he had to pay 6% sales tax on the lawnmower, what was the total cos
    5·2 answers
  • A line has a slope of -2/3 and passes through the point (-3,8). What is the equation of the line?
    10·2 answers
  • 2. For the function f (x)=-457-1, find the inverse function. (1 point)
    9·1 answer
  • I need help clarifying some answers I have for these two different questions. For the first section, should I write A to B as (4
    14·1 answer
  • Based on the results of the simulation, if 224 groups are formed, about how many of them would you expect to contain one student
    14·2 answers
  • I have no idea how to do these
    7·1 answer
  • Please help!!!! !!!!!!!!
    5·1 answer
  • Rotate point B about point F 288 degrees clockwise
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!