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
olga55 [171]
3 years ago
10

I need help please!

Mathematics
2 answers:
Zigmanuir [339]3 years ago
7 0

Answer:

(8,2)

Step-by-step explanation:

We are given equations:

   5x-3y=34       (1)

     x-2y=4         (2)

On multiplying second equation by 5, we get

    5x-10y=20    (3)

On subtracting equation (1) by (3), we get

    7y= 14

⇒   y=2

Putting y=2 in equation  (2)

   x-2×2=4

⇒  x= 8

Hence, correct option is:

   (8,2)

Nana76 [90]3 years ago
3 0
<span><span><span>x−<span>2y</span></span>=4</span>;<span><span><span>5x</span>−<span>3y</span></span>=34</span></span>Step: Solve<span><span>x−<span>2y</span></span>=4</span>for x:<span><span><span>x−<span>2y</span></span>+<span>2y</span></span>=<span>4+<span>2y</span></span></span>(Add 2y to both sides)<span>x=<span><span>2y</span>+4</span></span>Step: Substitute<span><span>2y</span>+4</span>forxin<span><span><span><span>5x</span>−<span>3y</span></span>=34</span>:</span><span><span><span>5x</span>−<span>3y</span></span>=34</span><span><span><span>5<span>(<span><span>2y</span>+4</span>)</span></span>−<span>3y</span></span>=34</span><span><span><span>7y</span>+20</span>=34</span>(Simplify both sides of the equation)<span><span><span><span>7y</span>+20</span>+<span>−20</span></span>=<span>34+<span>−20</span></span></span>(Add -20 to both sides)<span><span>7y</span>=14</span><span><span><span>7y</span>7</span>=<span>147</span></span>(Divide both sides by 7)<span>y=2</span>Step: Substitute2foryin<span><span>x=<span><span>2y</span>+4</span></span>:</span><span>x=<span><span>2y</span>+4</span></span><span>x=<span><span><span>(2)</span><span>(2)</span></span>+4</span></span><span>x=8</span><span>(Simplify both sides of the equation)</span>
You might be interested in
PLS HELP GIVING 11 POINTS
Svetradugi [14.3K]

Answer:

3. 40 4. 132

Step-by-step explanation:

you multiply the length and the width

8 0
1 year ago
Read 2 more answers
PLEASE HELP ASAP
Volgvan

The length of each side of the polygon is the number of units on each side of the polygon, and the perimeter of the factory is 1000 feet

<h3>The length of each side of the polygon?</h3>

To do this, we simply calculate the number of units on each side of the polygon.

So, we have:

S1 = 5 units

S2 = 8 units

N1 = 13 units

E1 = 7 units

W1 = 3 units

W2 = 4 units

<h3>The perimeter of the polygon</h3>

This is the sum of the side lengths.

So, we have:

Perimeter = 5 + 8 + 13 + 7 + 3 + 4

Perimeter = 40

Each unit equals 25 feet.

So, we have:

Perimeter = 40 * 25 feet

Evaluate

Perimeter = 1000 feet

Hence, the perimeter of the factor is 1000 feet

Read more about perimeter at:

brainly.com/question/24571594

#SPJ2

8 0
2 years ago
Read 2 more answers
..........................
liubo4ka [24]

Answer:

82.96

Step-by-step explanation:

area of box:

A = L^2 = (14 in.)^2 = 196 in.^2

area of pizza:

A = (pi)r^2 = 3.14 * (6 in.)^2 = 113.04 in.^2

Empty area:

196 in.^2 - 113.04 in.^2 = 82.96 in.^2

7 0
3 years ago
The equation of a circle is given below.<br> What is its center?
svp [43]

Answer:

( \frac{2}{3}, 0)

Step-by-step explanation:

The general equation for a circle is

{(x - a) }^{2}  + {(y - b) }^{2}  =  {r}^{2}

Where a and b are the x and y values of the centre. So comparing to your equation you can see that a is 2/3 and b is 0

6 0
3 years ago
What is the derivative of pi?
vredina [299]

A "derivative" is a rate of change.

The derivative of a plain old number is zero, since numbers never change.

Pi is a number.  Its value never changes.  Its derivative is zero.

4 0
3 years ago
Read 2 more answers
Other questions:
  • write an equation to represent the relationship "a number decreased by negative 7 is the same thing as 48
    11·2 answers
  • Data on the number of work days missed and the annual salary increase for a company’s employees show that, in general, employees
    11·1 answer
  • Need help with this question
    7·2 answers
  • 4(x + 3) = 3(3x - 1)
    12·2 answers
  • An is formed by two rays that share an endpoint
    5·2 answers
  • It’s worth 22 points Help please !!!???
    5·2 answers
  • A district manager has 8 different stores. He wants to reward some of his
    6·1 answer
  • A group of friends wants to go to the amusement park. They have no more than $125 to spend on parking and admission. Parking is
    6·1 answer
  • Consider the expressions (3m+2n−6) and (−4−6m+7n). What is the sum of the expressions for n = -2 and m = 5?
    11·1 answer
  • F(x) = x2 – 2x + 5<br> .<br> What is the value of f(12) ?<br> f(12) =
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!