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
olga nikolaevna [1]
2 years ago
8

**Solve by Elimination 3 + 2x - y = 0 -3-7y = 10x 7) x = 8) y =

Mathematics
1 answer:
timofeeve [1]2 years ago
7 0
Answer:

Explanation:

3 + 2x - y = 0
Or 2x - y = -3 (1)

-3-7y = 10x
Or -10x - 7y = 3 (2)

2x - y = -3 (1)
-10x - 7y = 3 (2)
———————

Multiply 5 to (1)

5(2x - y = -3)
-10x - 7y = 3
———————
10x - 5y = -15
-10x - 7y = 3
———————
-12y = -12
y = -12/-12
y = 1

Plug y value in (1)

2x - 1 = -3
2x = -3 + 1
2x = -2
x = -2/2 = -1

Therefore, x = -1 and y = 1
You might be interested in
In order to figure out who will go first in a game, your friend asks you to pick a number between 1 and 25. What are the possibl
siniylev [52]

Answer:

Step-by-step explanation:

The possible outcomes include 1, 2, 3, etc., up through 25.  This in itself is insufficient to specify who will go first.  There must be some further criteria.

Suppose each player chooses and announces a number from this set by writing it down on a scrap of paper which is placed face-down on the table.  The person who chooses the smaller number goes first.  Or, the person who chooses the larger number goes first.

8 0
3 years ago
A can of soup has the shape of a cylinder.
Jobisdone [24]

Answer:

Step-by-step explanation:

Height h = 4.5 inches

Radius r = 3.4/2 = 1.7 inches

Area of base = πr² = 2.89π square inches

Volume of cylinder = πr²h = 2.89π4.5 = 13.0 cubic inches

6 0
2 years ago
Read 2 more answers
Write an expression that is equal to 10 using only four 2s and any number of math symbols​
diamong [38]

(4 \times 2) + 2

8 0
3 years ago
Read 2 more answers
The lowest number is 11 the range is 13 and the median is 17 what are the 3 numbers
11Alexandr11 [23.1K]

Answer:

11, 17, and 28.

Step-by-step explanation:

x, y, z\\

Lowest number is x

Median is y

Highest number is z

x=11\\y=17\\\\z-x=17\\z-11=17\\z-11+11=17+11\\z=28\\\\x=11\\y=17\\z=28\\\\11, 17, 28

3 0
3 years ago
A bag contains 2 white marbles and 7 purple marbles. Two marbles are drawn at random. One marble is drawn and not replaced. Then
Masja [62]
A.
\frac{7purple}{9total} *  \frac{2white}{8total}  \\  \frac{14}{72}  \\ =0.194
The denominator of the second number goes down one because you aren't replacing the initial marble pulled, making the amount of marbles in the bag go down, but not affecting the white count because you pulled a purple marble.
b.
\frac{2white}{9total} *  \frac{1white}{8total}  \\  \frac{2}{72}  \\ =0.278
The same can be said about the denominator for this problem, but not the numerator. The numerator must go down one number as well, because you already chose one white marble, taking one of the white marbles out of the bag, leaving you with one solitary, white marble.
c.
Chance of selecting two purple marbles:
<u />\frac{7purple}{9total} *  \frac{6purple}{8total}  \\  \frac{42}{72}  \\ =0.583
Chance of selecting two white marbles:
\frac{2white}{9total} * \frac{1white}{8total} \\ \frac{2}{72} \\ =0.278
<u>Chance of selecting two purple</u> vs. <em>Chance of Selecting 2 white:</em>
<u>0.583</u>><em>0.278</em>.
It is more likely to select 2 purple marbles.

Hope this helps!
6 0
3 years ago
Read 2 more answers
Other questions:
  • 2 centimeters on the map represents 100 kilometers
    10·1 answer
  • 87 * 98 * 8845 * 65489 * 7421
    10·2 answers
  • Which of the following equations are equivalent to -2m - 5m - 8 = 3 + (-7) + m?
    13·2 answers
  • You spend $264 on clothes. Shirts cost $24 and pants cost $32. You buy a total of 9 items
    11·2 answers
  • 3+2(x-9)=12-7x please help
    5·1 answer
  • 11. The diagram shows the dimensions of Anna’s laundry room floor. 4 feet 2 feet 12 feet 8 feet 6 feet Use either addition or su
    8·1 answer
  • Ironman went to the store and bought 2 shirts that were the same amount and a pair of shoes. The shoes cost 12.50. If his total
    11·1 answer
  • Which of the following points lie on the unit circle
    7·2 answers
  • Please help a bro out
    12·1 answer
  • Find the exact values of x and r
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!