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
Gekata [30.6K]
2 years ago
14

ASAP☑️☑️ Can you guys help me please

Mathematics
1 answer:
-Dominant- [34]2 years ago
5 0

Answer:

x = 9 , y =3

Step-by-step explanation:

-3x + y = 0 ---- 1

2x -2y = -12 -----2

By elimination method:

let's first eliminate x

we can do that by making x equal in both equations

multiply equation 1 by 2 ( because 2 is the coefficient of x in equation 2 and remember we want to equate both equations)

multiply equation 2 by -3 ( because -3 is the coefficient of x in equation 2 and remember we want to equate them both)

-3x + y = 0 ×2

2x -2y = -12 ×-3

-6x + 2y = 0 ----3

-6x + 6y = 36 -----4

subtract equation 4 from 3

that will give

0-4y = -36

which is

-4y = -36

divide both sides by coefficient of y which is-4

(-4y) ÷ (-4) = (-36)÷(-4)

answer : y= 9

substitute 9 for y in equation 1

-3x + y = 0

-3x + 9 = 0

subtract 9 from both sides

-3x +9-9= 0-9

-3x = -9

divide both sides by coefficient of x which is-3

(-3x)÷(-3) = (-9÷-3)

x = 3

You might be interested in
How do you write 4 out of ten as a decimal?
Elodia [21]
4 out of 10 (or 4/10) is written as .4 as a decimal. This is because when you divide 4 by 10, you get .4
7 0
3 years ago
Read 2 more answers
15<br> 2 pts<br> Find the area of the given shape,<br> a) 18<br> b) 15<br> c) 24<br> d) 21
Nataly [62]

9514 1404 393

Answer:

  A.  18

Step-by-step explanation:

The area of a trapezoid is given by the formula ...

  A = 1/2(b1 +b2)h

Here, the parallel bases have lengths 3 and 9. The height is 3, so the area is ...

  A = 1/2(3 +9)(3) = 18

The area of the trapezoid is 18 square units.

3 0
2 years ago
What’s the perimeter can you show me how to do it
goldenfox [79]

Answer:

48 sq. ft.

Step-by-step explanation:

P=12 times 12 which equals 144

A=12+12+12+12=48

7 0
3 years ago
What is the value of sin A?<br><br> A. 9/12<br><br> B. 12/9<br><br> C. 9/15<br><br> D. 12/15
Whitepunk [10]

D

sinA = \frac{BC}{AB} = \frac{12}{15} = \frac{4}{5}


3 0
3 years ago
How do you solve (3+z)6+18z?
Alex787 [66]
18 + 6z + 18z
24z + 18
4 0
3 years ago
Other questions:
  • Heidi, a jewelry salesperson, earns a commission of $55 every time she sells a diamond ring. How many rings does she have to sel
    15·2 answers
  • 16.75 + 3.2d – 4 + 6d = 51.39​
    7·1 answer
  • The price of an item has been reduced by 55%. The original price was $35. What's the price of the item now ?
    15·2 answers
  • Tacoma's population in 2000 was about 200 thousand, and has been growing by about 8% each year. If this continues, what will Tac
    6·1 answer
  • Calculate the area of a circle with radius of 2 cm
    9·2 answers
  • Let set A = {odd numbers between 0 and 100} and set B = {numbers
    14·1 answer
  • NO SILLY ANSWER, OR JUST DOING IT FOR THE POINTS!! WILL GIVE BRAINLEYEST
    13·2 answers
  • The sum of 30 times (1-3)^(n-1) from n=1 to infinity
    10·1 answer
  • What is your favorite video game and why?
    5·2 answers
  • A high school student working part-time as a cook had a gross income of
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!