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
Dafna11 [192]
3 years ago
15

Solve the system by using elementary row operations on the equations. Follow the systematic elimination procedure.

Mathematics
1 answer:
Natali5045456 [20]3 years ago
4 0

Answer:

Step-by-step explanation:

The given equation is expressed as

x1 + 2x2 = -24- - - - - - - - --1

x1 + 7x2 = -11- - - - - - - --2

We would eliminate x1 by subtracting equation 2 from equation 1. It becomes

- 5x2 = - 13

Dividing both sides of the equation by - 5, it becomes

- 5x2/- 5 = - 13/- 5

x2 = 13/5

Substituting x2 = 13/5 into equation 2, it becomes

x1 + 7 × 13/5 = -11

x1 + 91/5 = - 11

x1 = - 11 - 91/5

x1 = - 146/5

You might be interested in
If a triangle has a base of 5 cm and a height of 6 cm what’s it’s area?
Margarita [4]

Answer:

the area is 30 you have to muiltly the two together

Step-by-step explanation:

4 0
3 years ago
Find the sum of the first 40 even positive integers.
Pachacha [2.7K]

Answer:

1640

Step-by-step explanation:

Even, positive integers

2+4+6+8+10+12+14+16+18+20+22+24+26+28+30+32+34+36+38+40+42+44+46+48+50+52+54+56+58+60+62+64+66+68+70+72+74+76+78+80 = 1640

6 0
1 year ago
Yup there's more pls help
Artemon [7]
Top half:
D (x-2, y+3) E (x-3, y(+\-) 0) F (x+1, y-2)
P (x+1, y+2) Q (x+3, y+4) R (x+5, y+2)
7 0
3 years ago
PLZZZZ HELP The Lakeview city council is considering two different plans to help reduce the amount of pollution in the city. Pla
sdas [7]
1. The two equations follow the slope-intercept form which y=mx + b. They have the same y-intercept which is equal to 900.

2. Suppose x= 10
    Plan Alpha: y=-7x+900=-7(10)+900=830
    Plan Foxtrot: y = -17x+900 = -17(10)+900=730
    
    Between the 2 plans, the lower value is 730. Plan Foxtrot is better for reduction of pollution.

3. The city council should choose Plan Foxtrot because the reduction of pollution is much greater. Their goal would be reached faster if they go with faster reduction of pollution.
5 0
2 years ago
What would the answer to this question be? show work please
AURORKA [14]

Answer:

B

Step-by-step explanation:

The volume of a rectangular prism is the length times width times height.

V = LWH

V = (4√3)(3√6)W

V = 12√18 W

V = 36√2 W

If the volume is irrational, then W cannot have a radical that is half of a perfect square, because when multiplied by √2, that would yield a rational volume.  For example, √18 × √2 = √36 = 6.

Therefore, the answer must be B, because 12 is not half of a perfect square.

V = 36√2 (4√12)

V = 144√24

V = 288√6

5 0
3 years ago
Other questions:
  • 68 miles to 42.5 miles
    14·2 answers
  • 7th grade help! On questions where it asks you which box plot shows a greater variability in its data.. what if the interquartil
    9·1 answer
  • Write a the equation of a line perpendicular to the line y=-7 and goes through the point (-2,3)
    9·1 answer
  • Solve 2x2 - 8x = -7<br><br> Which of the following is a solution of x2 + 5x = -2?
    6·1 answer
  • Jose and Tamara are decorating for a party. They have two different color streamers, red and blue. The ratio of length of red to
    12·2 answers
  • 2 1/2 gallon of paint can cover 150 square feet of wall. Based on this information what is the number of square feet that 1 gall
    13·1 answer
  • What is the value of y?
    15·1 answer
  • Need help here plss
    14·1 answer
  • The radius of a baseball is about 9.25 inches. The radius of the Basketball is 9.55 inches. What is the
    12·1 answer
  • a culture of bacteria starts with 505050 bacteria and increases exponentially. the relationship between bbb, the number of bacte
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!