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
k0ka [10]
3 years ago
14

Solving by elimination

Mathematics
1 answer:
yKpoI14uk [10]3 years ago
6 0

Answer:

x = 3

y = 6

Step-by-step explanation:

(-4x - y = -18)

2 (2x + 3y = 24)

-4x - y = -18

4x + 6y = 48

5 / 5y = 30 / 5

y = 6

______________________

-4x - (6) = -18

-4x - 6 + 6 = -18 + 6

-4x = -12

-4x / 4 = -12 / 4

x = 3

You might be interested in
X^2 - y^2 = 100
luda_lava [24]

Answer:

20

Step-by-step explanation:

Let's start by rewriting the second equation in terms of "x":

x+y=5

Subtract y from both sides:

x=5-y

Now, substitute "5-y" for "x" in the first equation:

(5-y)^2-y^2=100

Note that:

(a-b)^2=a^2-2ab+b^2

25-10y+y^2-y^2=100

Cancel out like terms:

25-10y=100

Subtract 25 from both sides:

-10y=75

Divide both sides by -10

y=\frac{75}{-10}=\frac{15}{-2}=-\frac{15}{2}

Now, substitute this value back into either of the equations to solve for x.

x+y=5\\x-\frac{15}{2}=5\\

Add 15/2 to both sides:

x=5+\frac{15}{2}\\x=\frac{10}{2}+\frac{15}{2}\\x=\frac{25}{2}

Now, find the difference:

x-y=\frac{25}{2}-(-\frac{15}{2})=\frac{25}{2}+\frac{15}{2}=\frac{40}{2}=20

8 0
2 years ago
A soccer ball is kicked up field as gloria runs to advance it further. The graph presents the distance that Gloria and the socce
inna [77]
The answer is d okay
3 0
2 years ago
Find the mean of the data set if necessary round to the nearest tenth 16, 12, 8, 22, 25, 8
Taya2010 [7]

15.2

16 + 12 + 8 +  22 +  25 +  8 = 91 / 6 = 15.16 = 15.2

4 0
2 years ago
2x+y=10x-4y i dont know
Basile [38]

Step-by-step explanation:

2x-10x= -4y-y

-8x= -5y

cancel (-) on both sides we get

8x=4y

7 0
3 years ago
Read 2 more answers
Factoring a polynomial is essentially dividing.
joja [24]

<span>yes, in the sense that factoring is the process of breaking apart things that are multiplied</span>
4 0
2 years ago
Read 2 more answers
Other questions:
  • Write a number that has the same value as 5.132* 10^8
    15·2 answers
  • Multiple Choice In Mr. Mamer's math class, there are three times as many girls as boys. The girls' mean grade on a recent quiz w
    10·1 answer
  • Express the ratio below in its simplest form.1:1.5<br>​
    14·2 answers
  • Identify the greatest rommon factor:<br> 3x²y - 6xy2
    10·2 answers
  • A coordinate grid with 2 lines. One line, labeled f(x) passing through (negative 2, 4), (0, 2), and the point (1, 1). The other
    9·2 answers
  • A cylinder has a base radius of 9m and a height of 14m. What is its volume in cubic m, to the nearest tenths place?
    6·1 answer
  • Draw a rectangular prism with a square base such that the pyramid’s vertex lies on a line perpendicular to the base of the prism
    5·1 answer
  • Emma and her family are saving for college. The first year will cost $18,500. She received a scholarship for $3,000 and her pare
    14·1 answer
  • What operation do we use to "scale up" an
    6·1 answer
  • The pair of polygons below are similar. Give the scale factor of figure A to figure B
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!