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
Alex Ar [27]
3 years ago
15

How do you solve the system of linear equations for this problem: (2.1x+4.2y=14.7) & (-5.7x-1.9y=-11.4)

Mathematics
1 answer:
Alenkinab [10]3 years ago
5 0
2.1x + 4.2y = 14.7 is the same as x + 2y = 7 (divide both sides by 2.1)
-5.7x-1.9y=-11.4 is the same as 3x + y = 6 (divide both sides by -1.9)

Rearrange the first equation to get x = 7 - 2y and substitute into the second equation, 3(7 - 2y) + y = 6, 21 - 6y + y = 6, 5y = 15, y = 3

Substitute y = 3 into the first equation x + 2(3) = 7, x = 1

x = 1 and y = 3
You might be interested in
What is the pattern rule that is used to get the next term in the pattern?
Ugo [173]

Answer:

The Pattern is the last number is multiplied by 4

8*4^{n-1}

Step-by-step explanation:

5 0
3 years ago
Find the area and circumference of each of the following circles ,in terms of pi
enyata [817]

Answer:

The area is about 1590 and the circumference is about 141

Step-by-step explanation:

5 0
3 years ago
Calculate the volume of a cylinder of height 7 cm and radius 4 cm (take π)​
belka [17]

Answer:

351.68

Step-by-step explanation:

v=\pir^2h

v= 3.14(4)^2(7)

v= 3.14(16)7

v= 3.14 times 112

v=351.68

hope this helps

4 0
3 years ago
What is the focus of the parabola<br> (y-3)^2=8(x-5)?
tino4ka555 [31]
Hello,

Let's suppose y'=y-3
and x'=x-5
Parabola  become y'²=8x' whose focus is (8/4,0)=(2,0)

y=y'+3==>y=0+3=3
x=x'+5==>x=2+5=7
Focus is (7,3)
Rem for parabola y²=kx focus is (k/4,0)


7 0
3 years ago
Alex weighs 185 pounds. If he decreases his weight by 10% what would be his new weight?
PSYCHO15rus [73]

Answer:

166.5

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Cuánto es 7 octavos más un medio
    12·2 answers
  • Suppose the diameter of a circle is 4 units. What is its circumference?
    15·1 answer
  • What is the sum of the measures of the exterior angles of an equilateral triangle?
    8·1 answer
  • A prism with a base area of 8 cm² and a height of 6 cm is dilated by a factor of 54 .
    12·1 answer
  • Solve for x, x^2-3x-5=0
    9·1 answer
  • Write and solve an equation for the following situation:
    12·1 answer
  • The desks in a school are arranged in 6 rows with 12 desks in each row. If the desks are
    14·1 answer
  • If 420 miles = 20 cm on a map, how many miles is 1 cm?
    13·2 answers
  • Help pls i have no clue
    15·1 answer
  • Look at the photo I’m about to have to math class i need help! I’ve got 15 mins!
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!