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
ololo11 [35]
4 years ago
11

9x-2y=-21 2x+3y=16 Substitution

Mathematics
1 answer:
hjlf4 years ago
3 0
9x-2y=-21 \\\\  9x=-21+2y \\\\ => \boxed{x=\frac{2y-21}{9}} \\\\ 2x+3y=16 \\\\ 2*\frac{2y-21}{9}+3y^{(9}=16^{(9} \\\\ 2(2y-21)+27y=144 \\\\ 4y-42+27y=144 \\\\ 31y=144+42 \\\\ 31y=186 \\\\ \boxed{y=\frac{186}{31}=6} \\\\ x=\frac{2*6-21}{9} \\\\ x=\frac{12-21}{9} \\\\ x=\frac{-9}{9} \\\\ \boxed{x=-1}
You might be interested in
a food critic collected data on the lengths of time customers waited for their food. order the data from least to greatest time.
Alex17521 [72]
Ok, kind of hard to draw a graph here, but i will try. Look at the numbers, list them from least to greatest. then create the line plot with the numbers, then a tally table.
6 0
3 years ago
Find the simplified product:<br> √2x² • √184²
KatRina [158]
I believe it is numbers 184x√2
4 0
3 years ago
A student had taken 7 tests and received scores of 88, 73, 81, 83, 79, 73, and 97.
Elden [556K]

Answer:

median=81

mode=73

range=24

Step-by-step explanation:

median: Middle number from lowest to highest crossing one-off from either side.

(73,73,79,81,88,97)

mode:most popular number.

range: highest number minus lowest number.

8 0
3 years ago
A number, x, multiplied by 4 is subtracted from the difference of the same number and 65
Ipatiy [6.2K]
X - 65 - 4x.
3x - 65.
I assume that you subtract x times four (a number, x, multiplied by 4) FROM the difference of x and 65 (the same number and 65).
Hope this helps!
5 0
3 years ago
Question 18 three consecutive integers have a sum of 42 . find the integers.
Aloiza [94]
The three consecutive integers can be represented by x, x+1, and x+2

x+(x+1)+(x+2)= 42
3x+3=42
3x=39
x=13

Final answer: 13, 14, 15
5 0
3 years ago
Other questions:
  • Point P partitions the directed segment from A to B into a 1:3 ratio. Q partitions the directed segment from B to A into a 1:3 r
    14·2 answers
  • Which one of the following numbers is an irrational number?
    13·2 answers
  • Match each differential equation to a function which is a solution.
    13·1 answer
  • Square root of 675 in simplest form.
    9·1 answer
  • To buy both the green and the blue bikes would cost $1500. To buy the green and red bikes would cost $750. To buy all three bike
    11·2 answers
  • 27,16,8,5,19,14,22,31,13,5,23,16,8 what is the mean and meidean and Interquartile range:
    11·1 answer
  • 6x = 72<br><br>one step equation​
    13·1 answer
  • -3x-5y=-7 <br> Find slope of perpendicular line
    7·1 answer
  • Wolf brothers help me out, please no link
    10·2 answers
  • Peter drove 1.5 hours at an average speed of 40 mph. He then drove for another 40km.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!