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
kykrilka [37]
4 years ago
10

Mark is solving the following system.

Mathematics
2 answers:
fredd [130]4 years ago
6 0
I think its he didnt eliminate the same variables
miskamm [114]4 years ago
6 0

Solving the system of linear equations Mark tries to apply elementary transformations in order to eliminate one variable.

He makes such steps:

1. He multiplies equation (1) x+y+z=2 by 7 and adds it to equation (3) 4x-y-7z=16. This gives him:

7x+7y+7x+4x-y-7z=14+16,

11x+6y=30.

2. He multiplies equation (3)  4x-y-7z=16 by 2 and adds it to equation (2) 3x+2y+z=8. This step gives him:

8x-2y-14z+3x+2y+z=32+8,

11x-13z=40.

Thus, he did not eliminate the same variables in steps 1 and 2.

Answer: correct choice is C

You might be interested in
Plssssssssssssssssssssss helpppp​
morpeh [17]

Answer:

I think its 2 kg anyone correct me if I'm wrong!

5 0
2 years ago
Read 2 more answers
Solving quadratics equations by taking square root
Novay_Z [31]
#6
x^2 = 1
x = - 1 and x = + 1

#7
a^2 + 1 = 19
a^2 =18
a^2 =√ 9 <span>√ 2
a = + 3</span>√ 2 and a = - 3<span>√ 2</span>
4 0
4 years ago
Mon Tue Wed Thur Fri Sat Sun –2 –6 –3 2 6 –7 0 a. Arrange the temperatures in order from coldest to warmest. b. On a day in Janu
zvonat [6]

Answer:

A.) -7, -6, -3, -2, 0, 2, 6

B.) Jacob is correct, the larger the negative number, the lower the number is. So, since -11 is smaller than -7, it will be colder.

C.) Minneapolis is colder since -41 is way lower than -15.

-41<-15

7 0
3 years ago
Solve each problem and check your answer using estimates. a. $18.79 + $2.11 + ‐$1.92 + $17.28 b. $7.45 + ‐$24.45 + $74.17 + ‐$76
Aneli [31]

The solution to the linear expressions are:

  • a. $36.26
  • b. -$19.35
  • c. $70.38

<h3>Solving linear expressions:</h3>

The solution to linear expression is determined by taking into consideration the arithmetic operations used in each linear expression.

From the information given:

a. $18.79 + $2.11 + ‐$1.92 + $17.28

By rearrangement:

= $18.79 + $2.11 + $17.28 ‐$1.92

= $36.26

b. $7.45 + ‐$24.45 + $74.17 + ‐$76.52

By rearrangement:

= $7.45  + $74.17 ‐ $24.45 ‐ $76.52

= -$19.35

c.  $98.45 − $10.63 + $2.82 − $20.26

By rearrangement:

= $98.45 + $2.82 − $10.63 − $20.26

= $70.38

Learn more about solving linear expressions here:

brainly.com/question/2030026

#SPJ1

7 0
2 years ago
What is the slope? ​
Luda [366]

Answer:

-3

Step-by-step explanation:

Find two easy to read points on the graph.

I see (0, 1) and (-1, 4).

slope = rise/run

Start at (0, 1). Go up 3 units. That is a rise of 3. Now go left 1 unit. That is a run of -1.

slope = rise/run = 3/(-1) = -3

6 0
3 years ago
Other questions:
  • A separable differential equation is a first-order differential equation that can be algebraically manipulated to look like:
    10·1 answer
  • WHAT ARE THE THREE DIFFERENT TYPES OF ANGLES!!!!!!??
    5·1 answer
  • Steve made a sign for his room that is shaped like a triangle. It is 4.5 feet long and 3 feet high. He wants to make another sig
    5·2 answers
  • On this assignment, round all answers (when necessary) to exactly three decimal places. The numbers of construction workers for
    8·1 answer
  • Find the slope between these two points: (5,0) and (-1,12)
    6·1 answer
  • HELP ME PLLLLLLZ NO BOTS ASAP ASAP HELP
    12·1 answer
  • Calculate the square root of 1/2
    14·1 answer
  • If m2QSR = 4x, mZPSR= 153, and mZPSQ = 5x.<br> Find m2QSR.
    11·1 answer
  • Flight A left Las Vegas headed to San Diego traveling at 460 mph. At the same time, Flight B leaves San Diego headed to
    13·1 answer
  • Casey was at the surface of a swimming pool and recorded the following two measurements, in feet, on a number line:
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!