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
What is the answer? I'll give brainiest to whoever is right
drek231 [11]

Answer:

5) 0 6 ) 1/4

Step-by-step explanation:

So the slope ( gradient ) of line E is 0 because it is straight and it as no slope

The slope of line F is 1/4 because:

Gradient = y^2 - y^1 / x^2 - x^1

Gradient = 2-0 / 6- -2

Gradient= 2 / 8

2/8 in lowest term is 1/4

YOU MIGHT AVE A DIFFERENT METHOD BUT ANSWERS MUST BE THE SAME.

HOPE IT HELPED

5 0
2 years ago
Please answer this correctly
Mrrafil [7]
Gary swam the fewest laps.
Hope this helps!
3 0
3 years ago
Read 2 more answers
Jenna has at most $100 to spend on clothes. She wants to buy a pair of jeans for $29 and spend the rest on shirts. Each shirt co
maw [93]

Answer:

5 shirts (read explanation)

Step-by-step explanation:

14x+29=100

14x=71

x=5.1

She can buy 5 shirts

8 0
3 years ago
A farmer plans to fence a rectangular pasture adjacent to a river the pasture must contain 405,000 square meters
jeyben [28]

The dimensions of the garden that will require the least amount of fencing are 450 m and 900 m and the perimeter of the area is 1800 m.

<h3>What is the area of the rectangle?</h3>

It is defined as the area occupied by the rectangle in two-dimensional planner geometry.

The area of a rectangle can be calculated using the following formula:

Rectangle area = length x width

Let's suppose x and y are the sides of the rectangular garden and y is the parallel to the river.

Then according to the problem:

2x + y = P ..(1)

P is the perimeter of the rectangle.

xy = 405000  (area of the rectangle)

Plug the value of y in the equation (1) from the above equation.

P(x) = 2x + 405000/x

P'(x) = x—405000/x² = 0

x = 450 m

P''(x) > 0 hence at x = 450 the value of P(x) is minimum.

y = 405000/450

y = 900 m

P(min) = 1800 m

Thus, the dimensions of the garden that will require the least amount of fencing are 450 m and 900 m and the perimeter of the area is 1800 m.

Learn more about the rectangle here:

brainly.com/question/15019502

#SPJ4

7 0
2 years ago
Which is equivalent to 2^3·2^-5? A) 2-15 B) 2-8 C) 2-2 D) 22
IceJOKER [234]
I hope this helps you

6 0
3 years ago
Read 2 more answers
Other questions:
  • 1. 7 2/3 + 2 7/12
    15·1 answer
  • COULD SOMEONE PLEASE HELP
    14·1 answer
  • Identify the equivalent expression for each of the expressions below (m1/3 m1/5)^0
    9·1 answer
  • What does x equal if 8x - 4 equals 4x plus 1
    15·2 answers
  • HEY GUYS I NEED HELP WIT THIS PLZ HELP ME??!! 20 points!!
    5·1 answer
  • PLZ HELP ME! I NEED HELP ON THIS
    13·1 answer
  • Help <br><br> X(-X^4)(-x^4)=
    10·1 answer
  • Could someone answer these problems ?
    14·2 answers
  • Please help me out asap ​
    14·1 answer
  • How long of a chain Can Jill make by attaching a 13 3/4 inch chain to a 15 2/4 in chain?​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!