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
timurjin [86]
3 years ago
7

X+y=20 3x-3y=30 Which values of x and y satisfy this system of equations?

Mathematics
1 answer:
puteri [66]3 years ago
4 0

x +y = 20 ( rewrite as x = 20-y)

3x - 3y =30

3(20-y) - 3y = 30

60-3y - 3y = 30

60-6y = 30

-6y = -30

y = -30 / -6 = 5

x=20-5 = 15

x = 15, y = 5

You might be interested in
3. A copy machine makes 60 copies per minute. A second
Brums [2.3K]

Answer:

E

Step-by-step explanation:

6 x 480 + 8 x 60 = 960..........

8 0
2 years ago
The width of a rectangle is the length minus 4 units. The area of the rectangle is 12 units. What is the width in units of the r
Genrish500 [490]

Answer:

width = 2 units

Step-by-step explanation:

If the length of a rectangle is (x) units, then that means that the width of a rectangle is x - 4 units.

the area of a rectangle is length * width

so just substitute the values that we have now.

x (length) * (x-4) width = 12 (area of rectangle)

so that gives us

x^2 - 4x =12

subtract 12 from both sides

x^2 - 4x - 12 =0

now factor this equation

x^2 + 2x - 6x -12 = 0

x(x+2) - 6(x+2) = 0

(x-6)(x+2) = 0

x = 6, or x = -2 REMEMBER THAT VALUE OF x = LENGTH, IT CANNOT BE NEGATIVE AS YOU CANT HAVE NEGATIVE VALUE OF A SIDE

length = 6, and width = 6 -4 = 2

8 0
3 years ago
Read 2 more answers
Geometry!!!!!!!!!!!!!!!!!!!!
svlad2 [7]

Answer:

The two triangles are related by Side-Side-Side (SSS), so the triangles can be proven congruent.

Step-by-step explanation:

There are no angles that can be shown to be congruent to one another, so this eliminates all answer choices with angles (SSA, SAS, ASA, AAA, AAS).

This leaves you with either the HL (Hypotenuse-Leg) Theorem or SSS (Side-Side-Side) Theorem. We could claim that the triangles can be proven congruent by HL, however, we aren't exactly sure as to whether or not the triangles have a right angle. There is no indicator, and in this case, we cannot assume so.

This leaves you with the SSS Theorem.

8 0
2 years ago
A baby elephant weighs 200 pounds at birth. Seven years later, the elephant weight is 3,000 pounds. How much weight did the elep
Whitepunk [10]
400 pounds every year 
Hope I helped :3
6 0
3 years ago
A stick is 9 m long. A rope is 2 times as long as the stick. If the rope is divided into 3 pieces, how many meters long is each
givi [52]
The length of rope(consist of 3 pieces)=9*2=18m
One piece=18/3=6m
Pls mark me as the Brainliest as I really need it!
6 0
2 years ago
Read 2 more answers
Other questions:
  • Prove that the vector product (also called the cross product) of vectors in 3 dimensional space, does not satisfy an associative
    5·1 answer
  • Mrs.Smith paid 125 to have her hair and colored and cut if she tips her hairdresser 15% of her bill, how much was the tip
    14·2 answers
  • What is the answer please
    8·1 answer
  • Surface area is always measured in square units.<br><br> True<br> False
    5·2 answers
  • What is twenty five times three?
    9·2 answers
  • Is 21 a multiple of 6
    9·1 answer
  • Solve for the letter A
    10·2 answers
  • Mike travels 1/3 of mile in 1/8 of an hour. At this rate, how many miles can Mike travel in an hour? (Use RACE to answer)
    14·1 answer
  • How do i know if a system of equation has infinite number of solutions
    12·1 answer
  • Find the distance between the points (-4,5), (-12,5)
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!