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
sattari [20]
3 years ago
10

3x - y = 7 6x - y = 10 When solving this system of equations by elimination, which could be the resulting equation when a variab

le has been eliminated?
Mathematics
1 answer:
max2010maxim [7]3 years ago
6 0
It depends on which variable is eliminated.

If you multiply the second equation by -1 and eliminate the y:
3x - y = 7
-6x + y = -10
-3x = -3 or x = 1
 
If you multiply the first equation by -2 and eliminate the x:
-6x + 2y = -14
6x - y = 10
y = -4


You might be interested in
Find the distance points p (3,6) and q (7,3) to the nearest tenth?
Vladimir79 [104]
<h3>Answer: 5</h3>

=========================================================

One method is to plot the points P(3,6) and Q(7,3) on the same xy grid.  Plot a third point R at (3,3). See the diagram below.

A right triangle forms in which we can find the legs PR = 3 and RQ = 4. The hypotenuse is found through the pythagorean theorem.

a^2+b^2=c^2

3^2+4^2 = c^2

9+16 = c^2

c^2 = 25

c = sqrt(25)

c = 5

This is the length of PQ

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

Or you can use the distance formula which is effectively using the pythagorean theorem just in a slightly different format (though it may not be obvious).

d = \text{Distance from P to Q}\\\\d = \sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\\\\d = \sqrt{(3-7)^2+(6-3)^2}\\\\d = \sqrt{(-4)^2+(3)^2}\\\\d = \sqrt{16+9}\\\\d = \sqrt{25}\\\\d = 5\\\\

8 0
3 years ago
Read 2 more answers
Kaley reads 12 1/4 pages in 1/3 hour
nikklg [1K]
I’m guessing the questions is how many pages she can read in an hour?
the answer for that is
• 36.75
hope this helps x
3 0
3 years ago
Read 2 more answers
9d + d + 2d - 4 = 6d<br><br> A: 2/3<br> B: -2<br> C: 2/9<br> D: -9 <br><br> Please comment
jonny [76]
<span>9d + d + 2d - 4 = 6d
Add d to 9d
10d+2d-4=6d
Add 2d to 10d
12d-4=6d
Subtract 12d from both sides
-4=-6d
Divide -6 on both sides
Final Answer: 4/6 or 2/3 *Both answers are equivalent to each other.</span>
5 0
3 years ago
Read 2 more answers
A mass club has 40 members the number of girls is five less than two times the number of boys how many members are boys how many
Lorico [155]

Answer:

15 boys and 25 girls

Step-by-step explanation:

The sum of boys (b) and girls (g) is given as 40:

g + b = 40

The number of girls is 2 times the number of boys minus 5:

2b - 5 = g

First formula can be rewritten as g = 40 - b

Then you can substitute this for g in the second, and you get:

2b-5 = 40-b

Which simplifies to:

2b + b = 40 + 5

3b = 45

b = 15

g = 40-15 = 25

15 boys, 25 girls.

6 0
3 years ago
Sin(5x+20)
WINSTONCH [101]

Answer:

Yes.

Step-by-step explanation:

Just like normal algebra, you factor our the common factor, in this case, 5.

Thus,

\sin(5(x + 4))

4 0
3 years ago
Other questions:
  • Can someone help me with number 21. Please show steps
    13·2 answers
  • At which angle will the hexagon rotate onto itself? 60° 90° 120° 180°
    6·2 answers
  • The original price af a shirt is $120, the percent of decimal is %80 what is that sale price?
    9·1 answer
  • Emma's final grade in her math class is the average (mean) of her 5 chapter tests she took throughout the year. If she received
    15·2 answers
  • 1. You decide to invest $100,000 in a program that is guarabteed to grow by 2.5% for each of the next 5 years. At the end of the
    7·1 answer
  • Painting crew bought 30 gallons of paint for a job the crew members use 10 gallons of paint per hour until they used all the pai
    15·1 answer
  • DO NOT EXPLAIN WILL GIVE BRAINLIEST
    9·1 answer
  • Pls tell me if 70/100 is great in maths​
    6·1 answer
  • Which of these is a correct statement about the function graphed below?
    7·1 answer
  • The inverse of G(x) is a function.<br><br> • A. True<br> • B. False
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!