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
Softa [21]
3 years ago
9

Can someone help me find the value of x and the value of y? I need them to show their work, too.

Mathematics
1 answer:
solniwko [45]3 years ago
4 0

\bf \begin{cases} x-2y=0\\ 2x-5y=-4 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ x-2y=0\implies x=2y \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{substituting the found \underline{x} in the 2nd equation}}{2(2y)-5y=-4}\implies 4y-5y=-4\implies -y=-4 \\\\\\ y=\cfrac{-4}{-1}\implies \blacktriangleright y=4 \blacktriangleleft \\\\[-0.35em] ~\dotfill

\stackrel{\textit{substituting the found \underline{y} in the 1st equation}}{x-2(4)=0}\implies x-8=0\implies \blacktriangleright x=8 \blacktriangleleft \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ ~\hfill (8,4)~\hfill

You might be interested in
PLEASE HELP!! what is the surface area of a cylinder with a radius of 7 and a height of 32? Note: Answer must not be fraction or
Anton [14]

Area = 2pi*r*h + 2pi*r^2
Area = 2pi*r(h + r)
 
radius of 7 in and a height of 32 in


 Area = 14pi*39 = 546pi in^2

8 0
3 years ago
I need help on the top one hellppp it’s due today
Digiron [165]

Answer:

.666666... lph, 22 lawns

Step-by-step explanation:

6/9 to get lawns per hour.

Take that fraction times 33 to get lawns in 33 hours.

7 0
3 years ago
Please help me please
HACTEHA [7]

Answer:

200.96 ft²

Step-by-step explanation:

The area (A) of a circle is calculated as

A = πr² ( r is the radius ) , then

A = 3.14 × 8² = 3.14 × 64 = 200.96 ft²

4 0
3 years ago
PLEASE HELP!!!!!!! this is really hard!!!
bekas [8.4K]
When Anne Betty and Cynthia compared the amount of money each had, they discovered that Anne and Betty together had $12 Betty and Cynthia together had $18 and Anne and Cynthia together had $10. 
<span>Who had the least amount of money? and how much was it?
a +b = 12
b + c = 18
a + c = 10
So what I did is simple XD A logical guess and check. I started with a = 1, but that was to little. And also didn't match up. So I kept going up and got a = 2, b = 10, and c = 8</span>
4 0
3 years ago
The _____ is used to measure volume.<br> a.meter<br> b.gram<br> c. liter
Savatey [412]
Liter is used to measure volume
3 0
3 years ago
Read 2 more answers
Other questions:
  • Two friends share 7 cookies equally. How many cookies does each friend get?​
    8·2 answers
  • Identify the vertex of the function, f(x) = 3(x - 1)2 + 5.
    15·1 answer
  • Use Pythagorean’s theorem to find x
    13·1 answer
  • Which of the following ratios is equal to 14 : 21?<br><br> (2 : 3) (1 : 3) (2 : 5) (1 : 2)​
    14·2 answers
  • Jane class is trying to raise money for their class trip to Washington D.C by holding a car wash.On Saturday the class washed 25
    5·1 answer
  • show that if k is a positive constant, then the area between the x-axis and one arch of the curve y=sin kx is 2/k
    14·1 answer
  • Find the area of the image below:
    14·1 answer
  • Three siblings are doing their washing and hanging all the items on the washing line.
    6·1 answer
  • Helppppppppppppppppppppppppppppppppp
    15·1 answer
  • Points 50
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!