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]
4 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]4 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
Given: △OKE∼△VDE<br> Prove: EK/EO = ED/EV
harkovskaia [24]

Answer:

The proof is below.

Step-by-step explanation:

Given two triangles similar.

we have to prove that ratio \frac{EK}{EO}=\frac{VE}{ED}

As, △OKE∼△VDE

∴ their corresponding sides are in same proportion.

\frac{OK}{VD}=\frac{EK}{ED}=\frac{OE}{VE}

⇒ \frac{EK}{ED}=\frac{EO}{VE}

⇒ [tex}\frac{EK}{EO}=\frac{VE}{ED}[/tex]

Hence Proved.

6 0
4 years ago
Formar dos números pares de tres dígitos con el 2,4,8
Nitella [24]
248 , 842....aquí están los números....
8 0
3 years ago
Unfortunately, no one buys your bracelets at a price of $10. this is a signal for you to _____. make more bracelets lower your p
tamaranim1 [39]
I would think you would lower ur price. But I wouldn't  make the price so low so that it costs the same to produce them as it does to sell them, because then there would be no profit.
3 0
4 years ago
Read 2 more answers
How do I graph a rational function with a y intercept. Example 3x^2-1/2x+4 +1
zloy xaker [14]
Basically see where it intersectst the y axis
that is where x=0
so set x=0 and solve
3(0)^2-1/2(0)+4+1
4+1
5
the y intercept is at y=5, so yo uknow that (0,5) is on the graph
3 0
4 years ago
Someone help me with this pleaseee..
Blababa [14]

So whatever happened does not matter, They are only asking the volume of liquid left in A at the end. Therefore :

Calculation :

B + 120 = 4A

B = 4A - 120 ---------- 1

A - 120 = B ------------ 2

Subtract 2 from 1

B - B = 4A - 120 - A - 120

0 = 3A - 240

240 = 3A

240 ÷ 3 = A

8 = A

Answer :

A = 8

3 0
3 years ago
Other questions:
  • Does anyone know the answer to this equation I need a full explanation! 34= -2(x−6)
    11·1 answer
  • Describe the number 92 in tens and ones
    5·1 answer
  • An object at the top of a building with height 110 feet is thrown upward with an initial speed of 23 ft/s. Find its position z(t
    13·1 answer
  • Imani won 58 lollipops playing the bean bag toss at the county fair. At school she gave two to every student in her math class.
    12·1 answer
  • In calculating the probability of losing a game, you told a friend that your textbook referred to a loss as a "favorable event."
    6·1 answer
  • What are the 3 consecutive integers with a sum of 48
    14·2 answers
  • What is the constant of proportionality ​
    9·1 answer
  • Can someone help and explain
    8·1 answer
  • To find the volume of a prism, use the equation V = area of base (B) x height (h).
    13·1 answer
  • 5g - 7 for g = 9 I’m trying to Evaluate the algebraic expression
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!