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
expeople1 [14]
4 years ago
7

Solve by substitution (show steps) -3x-4y=10 -6x+y=-16

Mathematics
1 answer:
natali 33 [55]4 years ago
6 0
1) -3x-4y=10 ==> - 3x = 10+4y  ===> 3x= -10-4y==> x=(-10-4y)/3
Now replace x by its value in 2)

2) -6x+y=-16 ==> - 6[( - 10- 4y)/3] + y = -16 ==> -2[(-10-4y] +y =- 16
+20+8y+y =- 16==> 9y = - 16 - 20 ==> 9y = -36 & y = - 4.

Now replace y by (- 4) in any of the 2 equations & you will find x = 2

You might be interested in
-4 1/2 - 5 2/3 evaluate. Show all your work for full credit.
Serggg [28]

Answer: -10 1/6

Step-by-step explanation:

-4 - 1/2 - 5 - 2/3 are the separate parts.

-4 - 5 = -9

the LCD of 1/2 and 2/3 is 6

-3/6 - 4/6 = -7/6

-9 - 1 - 1/6

= -10 1/6

6 0
4 years ago
A city's population grows by about 3% each year. If the city's population is 63,000 people
steposvetlana [31]

Answer:

70,560

Step-by-step explanation:

6 0
3 years ago
Distance between -2 and -1
Lyrx [107]
1 unit of of somenumber i guess cxcxcx

5 0
3 years ago
Find the next three numbers in each pattern.
RoseWind [281]

Answer:

1. 32, 64, 128

2. 29, 35, 41

Step-by-step explanation:

6 0
3 years ago
Which value is a solution of the inequality 1/4 y ≥ 8?
Sonbull [250]

Answer:

32

Step-by-step explanation:

if y = one of those choises. the quarter of 32 is 8. half 32 is 16. 3/4 is 26.

(1/4)*328

8<u>>8</u>

8 0
3 years ago
Read 2 more answers
Other questions:
  • Noelle is constructing a square. She constructed AB⎯⎯⎯⎯⎯AB¯ , opened her compass to the length of AB⎯⎯⎯⎯⎯AB¯ , and drew circles
    13·1 answer
  • A student wrote the following equation and solution. Explain the error and correctly solve the equation: √p = 9/16 p = 3/4
    6·1 answer
  • 1) Identify the like terms: 9x , 10y , -9y , 10.
    13·1 answer
  • A 3 by 4 photo is being enlarged to a size of 15 by 20. what is the scale factor
    10·1 answer
  • A system of equations is given below:
    10·1 answer
  • When 5x^2 + 2= 4x is written in standard form, what are the values of a, b, and c
    11·1 answer
  • Pleaseee help with two questions!! 98 points!!!
    15·2 answers
  • -28- (3x+4)=2(x+6)+x
    14·1 answer
  • Radius of circle is 5cm find the largest chord
    14·1 answer
  • B) Work out (7 x 10^5) x(9x 10^7)<br> Give your answer in standard form.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!