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
ss7ja [257]
3 years ago
6

Help and explain pls and thankyouu

Mathematics
1 answer:
defon3 years ago
5 0

Hello,

1)

\left\{\begin{array}{ccc}2x-y&=&7\\-2x+3y&=&9\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}2y&=&16\\-2x+3y&=&9\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}y&=&8\\-2x+3*8&=&9\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}x&=&7.5\\y&=&8\\\end{array} \right.\\\\

Answer C

2)

\left\{\begin{array}{ccc}x-2y-3z&=&5\\x+2y+3z&=&7\\x+z&=&3\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}2x&=&12\\x+2y+3z&=&7\\x+z&=&3\\\end{array} \right.\\\\\\\left\{\begin{array}{ccc}x&=&6\\2y+3z&=&1\\z&=&-3\\\end{array} \right.\\\\\\\\\left\{\begin{array}{ccc}x&=&6\\y&=&5\\z&=&-3\\\end{array} \right.\\\\\\

Answer C

You might be interested in
A) 67°<br><br> B) 98°<br><br> C) 80°<br><br> D) 69°
zavuch27 [327]

Answer:

c

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Suppose 1/4 of people surveyed support changing the school dress code to enforce uniforms. How many people would you have to sel
Molodets [167]

Answer:

I'd say around eighty people. Hope that helps.

Step-by-step explanation:

6 0
3 years ago
If a turtle crawls 3 yards in one hour how far will the turtle crawl in an 1/4 of an hour
Sergio [31]

Answer:

0.0833

Step-by-step explanation:

3 divided by 1/4

5 0
3 years ago
Read 2 more answers
Is the line for the equation x = 4 horizontal or vertical? What is the slope of the line? Select the best answer.
Olegator [25]
The answer 
<span>The line is vertical. The slope is 0.</span>
6 0
3 years ago
Read 2 more answers
I’ll mark as brainliest!!!<br><br> Find x and y plz help
Hatshy [7]
Based on the angles, we know this is a 45-45-90 triangle.

In this type of triangle, x and y will be equal. The formula for the sides is x * rad 2 = 8 .

8/ rad 2 = 5.66

Both X and Y are 5.66 units.
6 0
2 years ago
Read 2 more answers
Other questions:
  • A company manufactures 2,000 units of its flagship product in a day. The quality control department takes a random sample of 40
    12·2 answers
  • Write the equation in slope intercept form please show me the steps so I can try to figure it out
    15·1 answer
  • Priya and Han plan a fundraiser for the running club. They begin with a balance of -80 dollars because of expenses. In the first
    10·1 answer
  • The population of Springdale increased by 20% in ten years. The population now is 24,000 people. What was the population ten yea
    8·1 answer
  • 4. Describe the proportion method for solving a percentage problem:
    12·2 answers
  • there are 7 people in his family if each burger weighs 3/4 of a pound how much ground beef should john buy
    9·1 answer
  • 9 people shared 6 subs equally how much each person get
    15·1 answer
  • Make 8 10 times as much
    15·1 answer
  • Ida needs to hire a singer for her wedding. Singer A is offering his services for an initial $65 in addition to $13.15 per hour.
    5·1 answer
  • PLEASE HELP!!!! 20 POINTS!!!!
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!