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
Vanyuwa [196]
2 years ago
12

-2x-9y=25 4x+9y=23 solve with elimination

Mathematics
1 answer:
Masja [62]2 years ago
4 0

Answer:

x = 24 and y= −73/9

Step-by-step explanation:

Let's solve your system by elimination.

−2x−9y=25;4x+9y=23

------------------------

−2x−9y=25

4x+9y=23

Add these equations to eliminate y:

2x=48

Then solve2x=48for x:

2x=48

2x/2 = 48/2

(Divide both sides by 2)

x=24

Now that we've found x let's plug it back in to solve for y.

Write down an original equation:

−2x−9y=25

Substitute24forxin−2x−9y=25:

(−2)(24)−9y=25

−9y−48=25(Simplify both sides of the equation)

−9y−48+48=25+48(Add 48 to both sides)

−9y=73

−9y/−9 = 73/−9

(Divide both sides by -9)

y= −73/9

You might be interested in
PLZ HELP WILL GIVE BRAINLIEST WORTH 10 PTS THX!!
antiseptic1488 [7]

Answer:

  64/49

Step-by-step explanation:

The applicable rules of exponents are ...

  (a^b)^c = a^(bc)

  (a^b)(a^c) = a^(b+c)

  a^-b = 1/a^b

  a^0 = 1

_____

Using these rules, we can simplify the given expression to ...

  \left(\dfrac{8\cdot 4\cdot 2}{8\cdot 7}\right)^2\times\left(\dfrac{8^0}{7^{-3}}\right)^3\times 7^{-9}\\\\=\dfrac{8^2}{7^2}\times(8^{0\cdot 3}\cdot 7^{3\cdot 3})\times 7^{-9}\\\\=\dfrac{64}{49}\times(8^07^{9-9})=\boxed{\dfrac{64}{49}}

6 0
3 years ago
Read 2 more answers
BRAINLIST IF CORRECT! 10 POINTS!<br> What is the constant of proportionality if x is 3 and y is 9?
velikii [3]

Answer:

constant of proportionality, k is 3

Step-by-step explanation:

constant, k= y/x

k=9/3

 = 3

7 0
3 years ago
Thomas calculates 9×7 by thinking avout it as 70-7=63. Explain thomas' strategy.
madam [21]
10 x 7 = 70
1 x 7 = 7
9 x 7 = 70 - 7
9 x 7 = 63
4 0
3 years ago
Read 2 more answers
Please fast brainly I give brainlies to the correct answer
sp2606 [1]
It’ll be the one on the far right last one ;)
4 0
2 years ago
Read 2 more answers
In the calculations shown, what will the units of the final answer be?
vazorg [7]

Answer: miles over hour

Step-by-step explanation:

just cuz

4 0
3 years ago
Other questions:
  • Question 10 of 21
    8·1 answer
  • Find the sum of 89,24,17
    14·1 answer
  • At the beginning of 2002, an ice cream shop claimed to have "nearly 969 different ice cream flavors." Assuming that you could ch
    11·2 answers
  • Edward owes his parents $20 for a new video
    12·1 answer
  • Solve 3/4h - 12 = 8 5/8​
    5·1 answer
  • Nine pieces of 8 in. ✕ 12 in. duct that is 2 2 3 ft in length is needed for a building. What is the total length (in ft) needed?
    6·1 answer
  • What is the exact value of x?<br><br> 5⋅21^5x = 16
    9·1 answer
  • Range includes all but what
    7·1 answer
  • GIVING BRAINLIEST BUT ANSWER IT CORRECTLY, NO LINKS
    10·2 answers
  • Estimate the quotient for 627 ÷ 9. explain how you found your awnser
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!