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
Wewaii [24]
3 years ago
9

Solve the system by substitution

Mathematics
1 answer:
mario62 [17]3 years ago
7 0
Um wow, I can't really tell you all of this but I got my answers from "cymath.com" So here is what it says:)

"Solve for <span>xx</span> in <span>2x+2z=4<span>2x+2z=4</span></span>How?
<span>x=2-z<span>x=2−z</span></span>
2 Substitute <span>x=2-z<span>x=2−z</span></span> into <span>-x-y-z=-8<span>−x−y−z=−8</span></span>How?
<span>-y-2=-8<span>−y−2=−8</span></span>
3 Substitute <span>x=2-z<span>x=2−z</span></span> into <span>-4x+4y+5z=7<span>−4x+4y+5z=7</span></span>How?
<span>-8+9z+4y=7<span>−8+9z+4y=7</span></span>
4 Solve for <span>yy</span> in <span>-y-2=-8<span>−y−2=−8</span></span>How?
<span>y=6<span>y=6</span></span>
5 Substitute <span>y=6<span>y=6</span></span> into <span>-8+9z+4y=7<span>−8+9z+4y=7</span></span>How?
<span>9z+16=7<span>9z+16=7</span></span>
6 Substitute <span>y=6<span>y=6</span></span> into <span>x=2-z<span>x=2−z</span></span>How?
<span>x=2-z<span>x=2−z</span></span>
7 Solve for <span>zz</span> in <span>9z+16=7<span>9z+16=7</span></span>How?
<span>z=-1<span>z=−1</span></span>
8 Substitute <span>z=-1<span>z=−1</span></span> into <span>x=2-z<span>x=2−z</span></span>How?
<span>x=3<span>x=3</span></span>
9 Therefore,
<span>x=3<span>x=3</span></span>
<span>y=6<span>y=6</span></span>
<span>z=-1<span>z=−1"</span></span>
<span>
</span>

You might be interested in
The interior angles formed by the sides of a hexagon have measures that sum to 720 degrees. What is the measure of angle F?
aniked [119]
The sum of the angles shown is ...
  720° = 3x + 240°
Then
  480° = 3x
  160° = x

Angle F = 160° -20° = 140°
8 0
3 years ago
Read 2 more answers
A survey is being conducted to decide on how much time people spend watching sports on television. Tell whether the given sample
Naddika [18.5K]

Sampling bias occurs when some members of a population are systematically more likely to be selected in a sample than others. From this definition,

For sample 1, Every fifth person who enters Little Casesars Arena for a Red Wings game. This is not biased because no person is more likely to be selected than another

For sample 2, Every tenth name in the phone. This is also not biased

because no person is more likely to be selected than another

4 0
3 years ago
Question today susan has 12.6 m ribbon to make flowers if she has to make 4 flowers,how ribbon would use to make 4 flowers
Leto [7]

Step-by-step explanation:

3.15m or 3 3/20m

She has a total of 12.6m of ribbbon.

She has to make 4 flowers and each has ribbon.

You take 12.6÷4

5 0
3 years ago
Read 2 more answers
How do I solve this?
Aleksandr-060686 [28]
First you have to set up your equation. 5x+80 and x+15. 
8 0
4 years ago
Read 2 more answers
Yuki bought a drop–leaf kitchen table. The rectangular part of the table is a 1–by–5–foot rectangle with a semicircle at each en
Arada [10]

Answer:

iodfk

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • (-5ab-5a-1) - (4ab+3)
    7·1 answer
  • One positive number is one-fifth of another number. The difference between the two numbers is 328, find
    5·1 answer
  • 5 plus 6 minus 4 plus 2 times 6 divided by 3= x x=10 how
    15·2 answers
  • What is the value when 2x+3y and x=5 y=2
    12·1 answer
  • Round 5.53 to one decimal place
    7·1 answer
  • (4.7 x 107) + (3.4 x 10)
    13·1 answer
  • Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).
    6·2 answers
  • Find the measure of the indicated arc
    9·1 answer
  • A committee must be formed with 3 teachers and 3 students. If there are 10 teachers
    7·1 answer
  • What is the total repayment made, including principal and interest, on a loan of $1,100 at 3.5% interest compounded annually ove
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!