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
Lana71 [14]
3 years ago
5

2x+5y=20. , -2x+20y=-90. one solution. infinity many ir no solution. use elimination to find your answer​

Mathematics
1 answer:
scoundrel [369]3 years ago
5 0
2x+5y=20
X=10-2.5y

-2(10-2.5y)+20y=-90
-20+5y+20y=-90
25y=-70
Y=2.8

2(2.8)+5y=20

5.6+5y=20
5y=14.4
Y=2.88

CHECK:
2(2.8)+5(2.88)=20

You might be interested in
50 points :)<br> 100-70=?
Marina86 [1]

Answer:

30

Step-by-step explanation:

Did you just do this for fun?

Either way have a good rest of your day!

3 0
3 years ago
Read 2 more answers
Make a number line and show all values of x such that: x less than or equal to -2 or x&lt;-5
Mila [183]
I uploaded the answer here is the link : jim hb/
5 0
3 years ago
ANSWER QUICK!!!!
deff fn [24]

Answer:

C

Step-by-step explanation:

When we write an equation, we look for something like is or equals

A.twice as much as a number   2x

B.12 less than a number      x-12

C.half of a number is 15   1/2x =15

D.the difference of 20 and a number?  20-x

A,B, and D are expressions

8 0
3 years ago
Read 2 more answers
The price of an item yesterday was 130. Today, the price fell to 91 . Find the percentage decrease.
Shalnov [3]

Answer:

30%

Step-by-step explanation:

130-91=39

39 / 130 =0.3

0.3x100=30

and you got the answer!

7 0
2 years ago
Read 2 more answers
Which of the following lists shows all the factors of 36? 2, 3, 4, 6, 9, 12, 18 1, 2, 3, 4, 9, 12, 18, 36 1, 2, 3, 4, 6, 9, 12,
MAVERICK [17]
<span>1, 2, 3, 4, 6, 9, 12, 18, 36
36 = 6*6 = 2*2*3*3
if you list out all the combinations of those factors, you'll get 7 factors: </span><span>1, 2, 3, 4, 6, 9, 12, 18, 36</span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • A man completes 10 laps of a circular track with a radius of 4.5 metres (when rounded to one decimal place). Find the minimum an
    11·1 answer
  • Please help me this is due tomorrow and please follow me and I am in the 5th grade
    5·1 answer
  • Which value of x would make NO || KJ?<br> 1<br> 6<br> 8<br> 10
    6·2 answers
  • Kyle wants to buy a new laptop that has an original price of $540. The store is having a sale, so the laptop is 10 percent off,
    5·2 answers
  • X(x+4)=x^+4x
    11·1 answer
  • Help me plzzz with my hw
    6·1 answer
  • What is the sum of 16 quotient of 3
    6·1 answer
  • I need help with this
    9·1 answer
  • The Lunchroom Murder
    15·1 answer
  • 1. Based on the graph and the
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!