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
Rasek [7]
3 years ago
12

A little difficult question for me, it is multiple choice answer but my teacher taught this before the break. If anyone could he

lp me that would be wonderful.

Mathematics
1 answer:
Sever21 [200]3 years ago
7 0
<h3>Answer: Choice D</h3>

Divide both sides of the first equation by 7, then add the result to the second equation

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

Explanation:

We can multiply both sides of an equation by the same number and the equation will be equivalent to the original.

For example, if we had  x = 5, then we could get 2x = 10 after multiplying both sides by 2. The reason they are equivalent equations is because the same x value is the solution for both equations.

We can also divide both sides of an equation by the same number and the two equations would be equivalent. We can go from 2x = 10 back to x = 5 when we divide both sides by 2.

----------

If we divide both sides of 7x - 21y = 14 by 7, then we end up with x - 3y = 2. Simply divide each term (7x,  -21y, and 14) by 7.

Because 7x-21y=14 and x-3y=2 are equivalent, this means we can replace the "7x-21y=14" with "x-3y=2"

--------

The new system would be

x-3y = 2

2x+3y = 11

From here you add straight down. Doing so will have the y terms add to -3y+3y = 0y = 0. After this point the y terms are eliminated and you can solve for x just like with any other equation of one variable.

You might be interested in
Can anyone help me with this problem
Soloha48 [4]

Answer:

126 Inches are in 3.5 yards

8 0
3 years ago
Read 2 more answers
What is 8 square root of 3 divided by 2? no decimals, ill mark brainlist.
katovenus [111]
2.828
Step-by-step explanation:
Given : Number = 8
To Find : find the square root of 8 upto 2 decimal places​
Solution :
We are supposed to find the square root of 8
Group the digits into pairs
For digits to the left of the decimal point, pair them from right to left.
For digits after decimal point, pair them from left to right).
So, we have , 08
Refer the attached figure for further steps
√8 = 2.828
Hence the square root is 2.828
Since , you asked for 2 decimal places so the answer is:
Answer:
2.82
Step-by-step explanation:
√8=2*√2= 2*1.41= 2.82



grendeldekt and 5 more users found this answer helpful

THANKS
2
4.7
(3 votes)

Log in to add comment
Answer
4.0/5
2

muhammedarsham11
Virtuoso
35 answers
2.4K people helped
Answer:
2.828 is the answer...



3 0
3 years ago
Read 2 more answers
PLEASE HELP ME with this question
vovangra [49]

Answer:

abc are correct

Step-by-step explanation:

i took the test

8 0
2 years ago
A cube has a side length of 5xcm. What is the volume of the cube?<br>no links please.​
finlep [7]

Answer:

125 cm

Step-by-step explanation:

V=lwh

all cube has the same length, width, height

5 * 5 * 5 = 125

Hope this helps

7 0
3 years ago
A group of ten 6- and 12-volt batteries are wired in series. The sum of their voltages is 84 volts. How many of each type of bat
rusak2 [61]
...... I need this as well please help us!!!
8 0
3 years ago
Other questions:
  • Is the square root of 10 rational
    13·1 answer
  • What is the sum of the polynomials?
    5·1 answer
  • Given two ways to write an expression 6 (y)?
    13·1 answer
  • Draw two possible rectangles for each perimeter. Find the area 20 units
    11·1 answer
  • IF YOU $80 AND THEN GET $20 MORE,WHAT IS THE PERCENTAGE
    8·1 answer
  • Solve for the unknown 7/G = 35/50
    15·2 answers
  • What is the area of the figure in square centimeters?
    5·2 answers
  • Help plz find the area of the polygon simple
    12·2 answers
  • SOLVE 23 ASAP PLEASE!!
    6·1 answer
  • If you are rolling two dice (numbered 1-6), what is the probability that the first die shows a 4 and the second die shows a 2?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!