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
Anuta_ua [19.1K]
3 years ago
13

How do you solve this equation -6x + 7y =13 and -6x +8y =20 using elimination

Mathematics
1 answer:
ohaa [14]3 years ago
8 0

Answer:

x=6,y= 7

Step-by-step explanation:

-6x +7y= 13

-6x+8y=20

-y = -7

divide through by -1

y =7

sub y= 7 in equation 1

then x= 6

You might be interested in
PLSSS HELP IM CRYINGGGGGGg
Gre4nikov [31]

Answer:

62.5

Step-by-step explanation:

750 dollars divided by 12 months is 62.5

8 0
3 years ago
Read 2 more answers
Do number 4 please DONT get it wrong or i block report, i really need help please :)
andriy [413]

Area of the figure = 30.28 m²

Solution:

The given image is splitted into two shapes.

One is rectangle and the other is semi-circle.

Length of the rectangle = 6 m

Width of the rectangle = 4 m

Area of the rectangle = length × width

                                    = 6 m × 4 m

                                    = 24 m²

Area of the rectangle = 24 m²

Diameter of the semi-circle = 4 m

Radius of the semi-circle = 4 m ÷ 2 = 2 m

Area of the semi-circle = \frac{1}{2} \ \pi r^2

                                      $=\frac{1}{2} \times 3 .14 \times 2^2

                                      =6.28

Area of the semi-circle = 6.28 m²

Area of the figure = Area of the rectangle + Area of the semi-circle

                              = 24 m² + 6.28 m²

                              = 30.28 m²

Area of the figure = 30.28 m²

3 0
3 years ago
A circle’s circumference is approximately 76 cm.
olya-2409 [2.1K]

Answer: Area= 459.73cm^2

Step-by-step explanation: Circumference of a circle is 2πr

76=2×3.14×r

r= 76÷(6×3.14)

r=12.10

Area of a circle= πr^2

Area= 3.14×(12.10)^2

Area= 456.73cm^2

8 0
3 years ago
Is -6.175 is an irrational number?
kipiarov [429]
No.

Any number you can write completely is a rational number.
Any number with a repeating decimal fraction is also a rational number.
___
Any number that goes on forever without repeating is an irrational number. These are usually represented symbolically (because they cannot be written "exactly" any other way). These include such numbers as √2, π, e, ∛(-4), and an infinite number of others.
4 0
3 years ago
What is the value of n in the equation (1)/(2)(n-4)-3=3-(2n+3)
Pavel [41]

(1/2)(n-4)-3=3-(2n+3)

n = 2

but if it is

(n-4)-3=3-(2n+3)

n = 7/3

5 0
3 years ago
Other questions:
  • I need help plssssssssssssssss
    14·1 answer
  • Please help this is due in 30 minutes!​
    6·1 answer
  • BASIC ALGEBRA PLZZZ HELP<br> (x+y)(x-y)
    8·2 answers
  • If ABC ∼ RST, then STR ∼ BCA. True False
    13·2 answers
  • Shape 1 and shape 2 are plotted on a coordinate plane. Which rigid transformation can you perform on shape 2 to show that shape
    7·2 answers
  • In 5 hours a small plane can travel downwind for 4000 kilometers or upward 3000 kilometers. Find the speed of this plane with no
    8·1 answer
  • PLEASE ITS SUPER SUPER URGENT <br><br> 3/5 divided by 1/3
    5·2 answers
  • ***NOTE YOU WOULD EARN 40 POINTS IF YOU ANSWER THIS QUESTION***
    10·1 answer
  • What is the ratio and percent of the rectangle below is shaded
    14·2 answers
  • -6x + 1 &gt; -23 which value of x is in the solution set of the inequality
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!