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
Leviafan [203]
4 years ago
13

Solve by Substitution Show Steps −2x + 3y + 5z = −21 −4z = 20 6x − 3y = 0

Mathematics
2 answers:
Anarel [89]4 years ago
5 0

−2x + 3y + 5z = −21

−4z = 20

6x − 3y = 0

do -4z=20 first

divide both sides by -4 to get z by itself

-4z/-4=20/-4

z=-5

Use z=-5 into −2x + 3y + 5z = −21

-2x+3y+5(-5)=-21

-2x+3y-25=-21

move -25 to the other side

sign changes from -25 to +25

-2x+3y-25+25=-21+25

-2x+3y=4

6x-3y=0

find x by eliminating y

Add the equations together

-2x+6x+3y+(-3y)=4+0

-2x+6x+3y-3y=4

4x=4

Divide by 4 for both sides

4x/4=4/4

x=1

Use x=1 into 6x − 3y = 0

6(1)-3y=0

6-3y=0

Move 6 to the other side

6-6-3y=0-6

-3y=-6

Divide both sides by -3

-3y/-3=-6/-3

y=2

Answer:

(1, 2, -5)

sergij07 [2.7K]4 years ago
4 0
It is in order by how you should solve I hope this helps

You might be interested in
Which number is irrational...please help!!
yKpoI14uk [10]

Answer:

D I think

Step-by-step explanation:

7 0
3 years ago
A parking lot covers 32,420 square feet. What is its area to the nearest thousand feet? Explain how you round the number.
REY [17]
The thousands place (1000) is the fourth number to the left of the decimal, so round that one either up or down based on the number just one spot closer to the decimal, in this case, the hundreds place (100).

so we have 32,420

we can ignore the numbers that are going to become zeros as a result of the rounding . .

32,400

let's round 32,XXX either up or down based on the value in the hundreds place. if that value is 5 or greater, than we round up. if it is less than 5, than we round down.

4 is in the hundreds place, so we round down

32,000 is the answer
8 0
3 years ago
Please help me out man<br><br> f/ 6 = 17
ratelena [41]

Answer:

f/6=17

f=17×6

=102

Hope it helps!!!

7 0
2 years ago
Read 2 more answers
At the city museum, child admission is $6.00 and adult admission is $9.20. On Tuesday, twice as many adult tickets as child
jekas [21]

Answer:

38

Step-by-step explanation:

3 0
3 years ago
What is the median of this list of numbers? 6, 2, 7, 2, 3
Vika [28.1K]
The median means the number that is in the middle of the spnumber sequence in least to greatest. 1) number the numbers up. 2,2,3,6,7 2) start by crossing off the last from the greatest. Then you can see that 3 is the median.
4 0
3 years ago
Read 2 more answers
Other questions:
  • Convert each rate, Round to the nearest hundredth if necessary 17 cm/min=_____ ft/h
    12·1 answer
  • A certain human red blood cell has a diameter of 0.000007 meters.Write an expression that represents this diameter, in meters in
    10·1 answer
  • Sally is trying to decide what to wear to school. She has 5 pairs of pants, 10 shirts, and 3 pairs of shoes. Assuming everything
    8·1 answer
  • Ans is 1 .I want the method​
    6·1 answer
  • purchased a toyota 4Runner for $25,635. promised your daughter the suv will be hers when the car is worth $10,000. according to
    9·1 answer
  • Need help ASAP i am timed
    8·1 answer
  • Hey guys, can you help me please​
    12·2 answers
  • Write the explicit formula for the geometric sequence below. 6,30,150,175
    5·1 answer
  • Which of the following determines a plane?
    13·1 answer
  • What is the solution to 2x+10y=-14 and x+5y=-7 answer using elimination with steps
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!