simultaneous equation

Simultaneous Equation

Answers

Answer 1

Answer:

(55/38,-16/19)

Step-by-step explanation:

4x -5y = 10

2x + 7y = -3

4x -5y = 10

-4x -14y = 6

-19y = 16

y = -16/19

2x  -112/19 = -57/19

x = 55/38


Related Questions

PLEASE HELP ME I DONT UNDERSTAND

Answers

Answer:

no

Step-by-step explanation:

the square root of 2 is not rational

for which values of X will the rational expressions below the undefined?

Answers

Answer:

x≠-7

Step-by-step explanation:

The function will be undefined when the denominator is zero

x+7≠ 0

x≠-7

Help would be appreciated!!!

Answers

Answer:

td/(r+e) = a

Step-by-step explanation:

t           a

----  = -----

r+e      d

Using cross products

t*d = a(r+e)

Divide each side by (r+e)

td/(r+e) = a

D should be the answer I’m not that sure

Find the perimeter of this semi-circle with diameter, d = 22cm.
Give your answer as an expression in terms of t.

Answers

Answer:

=22tcm

Step-by-step explanation:

Perimeter of a circle =πD

But π=t

hence perimeter; = 22tcm

where t=π

4 of 4
5 positive integers are arranged in ascending order, as follows:
3, 4, 8, 12, X
The mean and the median are equal.
Find X.
x

Answers

Answer:

x = 13

Step-by-step explanation:

3, 4, 8, 12, x

I went and solved for the mean and median and try to find out the best number that fits well for the mean and median to be equal

3, 4, 8, 12, 13

x = 13

SOMEONEEEE HELPPP MEEEE OUTTTT!!!!

Answers

Answer:

24°

Step-by-step explanation:

cos ? = 41/45

? = arccos 41/45

? = 24

Answered by GAUTHMATH

write in mapping notation

Answers

f: x -> 3x(powerof2) - 2

In a restaurant there are 5 possible pizza toppings chicken, pineapple olives mushrooms and beef Freddie picks two different toppings on his pizza

Answers

Answer:

please the question is not done

Step-by-step explanation:

please don't take this the wrong way

How many amount will be reqyired to plaster on the four walls at the rate of Rs 315per square meter?find it​

Answers

Incomplete question

Let the area be = 100 square meter

Cost of plaster = Rs 315 per square meter

No of walls = 4

Total area = 400 square meter

Then cost = 400 × 315

= Rs 1,26,000

Answered by Gauthmath must click thanks and mark brainliest

Sorry need pointsssss :-p

What is another name for a relation that has each element in its domain paired with exactly one element in its range?​

Answers

A function is a relation in which each element of the domain is paired with exactly one element of the range.

Help please ! Thank you!

Answers

:) :) :) :) :) :) :) :) :) :) :) :) :)


The marked price of a radio was 40% above the cost price. When it was sold allowing 30% discount on it, there was loss of RS. 100. What was the marked price of the radio.​

Answers

Answer:

7000

Step-by-step explanation:

70/100 * marked price = original price - 100

marked price = 140/100* og price

70/100 * 140/100 * og price = original price - 100

49/50 * og price = orignal price - 100

1/50 of original price = 100

orignal price = 5000

marked price = 140/100 * 5000 = 7000

The height of a baseball in feet can be found by the equation -4.982 – 20t + 1000. How far has the
baseball traveled at t = 6?

Answers

Answer:

875.018

Step-by-step explanation:

To solve this, we must plug in 6 for our t value. So, we have the equation:

-4.982 - 20(6) + 1000

Following the rules of PEMDAS, we have:

-4.982 - 120 + 1000 = 875.018

Judd bought a pack of pencils and sold it for 10% profit. Write an expression for the selling price.

Answers

selling price: 1,1x

since x 10% more than the full value (100%)

so, 110/100 . x = 1,1x

The expression which represents the selling price of the pen is

y = 1.1x  or [tex]selling\ price = 1.1\ cost\ price[/tex].

What is expression?

Expressions in math are mathematical statements that have a minimum of two terms containing numbers or variables, or both, connected by an operator in between.

What is profit?

A profit occurs when you sell something. for more than it cost.

Let x represents the cost price of the pens and y represents the selling price.

According to the question.

Judd sell the pens for 10% profit.

Now,

Profit = 10% of cost price

[tex]\implies profit = \frac{10}{100} \times x \\\implies Profit = 0.1x[/tex]

Therefore, the expression for the selling price of the pen is given by

[tex]y = cost\ price\ of\ pens + profit\\\implies y = x + 0.1x \\\implies y = 1.1x[/tex]

Hence, the expression which represents the selling price of the pen is

y = 1.1x  or [tex]selling\ price = 1.1\ cost\ price[/tex].

Find out more information about expression and profit here:

https://brainly.com/question/3927668

#SPJ2

Find the missing side lengths

Answers

Answer:

Does the answer help you?

Help plz ffggggggggggggggggggggggggggggg

Answers

Answer:

< EFG

< GFE

Step-by-step explanation:

The letter for the vertex must be in the middle

< EFG

< GFE

<F

Ade thinks of a number He doubles it and then subtract 5 The result cannot be less than 100 find the range of values of x

Answers

Answer: [tex]x\in [53,\infty)[/tex]

Step-by-step explanation:

Given

Ade doubles her number and subtract 5 from it. The result cannot be less than 100

Suppose the number is [tex]x[/tex]

According to the question

[tex]\Rightarrow 2x-5\geq100\\\text{Solve the inequality}\\\Rightarrow 2x\geq105\\\Rightarrow x\geq52.5\\\text{for integer number, the range is given by }\\\Rightarrow x\in [53,\infty)[/tex]

Make an Inequality! Twice the difference of a number and 7 is less than -30. Use c as the variable.

Answers

Answer:

7 - 2c < - 30

*To do this equation you would have to start with -30, because of "less than"

Hope this helps.

y=-1/2x +7

Line k is perpendicular to the line defined by the equation
above and passes through the point (4,0). Which of the
following points also lies on line k?
A) (0,8)
B) (2,-4)

C) (2,-2)
D) (2,8)

Answers

Answer:

B; (2,-4)

Step-by-step explanation:

The general equation of a straight line is;

y = mx + b

where m is the slope and b is the y-intercept

So from the question, when we look at the given equation, its slope is -1/2

mathematically, when two lines are perpendicular, the product of their slopes is -1

thus;

m1 * m2 = -1

m2 * -1/2 = -1

-m2 = -2

m2 = 2

The general equation form is;

y-y1 = m(x-x1)

where (x1,y1) = (4,0)

y-0 = 2(x-4)

y = 2x - 8

So, now we look at the point that will work for this equation

For the line that will work, if we substitute its x-value, we get the y-value

Let us take a look at option B

y = 2(2) -8 = 4-8 = -4

we can see that (2,-4) works

Find one rational number between 1 and 2.

Answers

There are infinitely many rational no.s between two no.s

one rational number between 1 and 2 is

11/10

Consider the three triangular pyramids.

Pyramid 1
Pyramid 2
Pyramid 3

Triangular pyramid 1. The base has a base of 12 meters and height of 2 meters. The height of the pyramid is 10 meters.

Triangular pyramid 2. The base has a base of 6 meters and height of 4 meters. The height of the pyramid is 10 meters.

Triangular pyramid 3. The base has a base of 12 meters and height of 4 meters. The height of the pyramid is 5 meters.

Which statement about their volumes is true? (Recall the formula V = one-third B h.)

O All three pyramids have the same volume.
O All three pyramids have different volumes.
O Only pyramids 1 and 2 have the same volume.
O Only pyramids 1 and 3 have the same volume.

Answers

9514 1404 393

Answer:

  (a) All three pyramids have the same volume

Step-by-step explanation:

The triangular base has an area of ...

  B = 1/2bh . . . . where b is the base of the triangle and h is its height.

The volume of the pyramid is ...

  V = 1/3BH . . . . where B is the area of the base, and H is the height of the pyramid.

Combining these equations gives ...

   V = 1/3(1/2bh)H = 1/6bhH

__

Pyramid 1 volume

  V1 = 1/6(12 m)(2 m)(10 m) = 40 m³

Pyramid 2 volume

  V2 = 1/6(6 m)(4 m)(10 m) = 40 m³

Pyramid 3 volume

  V3 = 1/6(12 m)(4 m)(5 m) = 40 m³

All three pyramids have the same volume.

Please help solve 1, and 2

Answers

Answer:

Step-by-step explanation:

1). WXYZ is a rectangle,

  Properties of a rectangle,

  i). Opposite sides are equal and parallel.

  ii). All interior angles measure 90°.

  iii). Diagonals are equal in measure.

a). WY = ZX = 30

 Therefore, ZT = [tex]\frac{1}{2}(ZX)[/tex]

                    [tex]ZT=15[/tex]

b). WY = ZX = 45

c). Since, WY = ZX,

    (4b - 16) = (3b + 5)

    4b - 3b = 16 + 5

     b = 21

2). GOAT is a rhombus and m∠OGA = 35°,

    a). m∠TGA = m∠OGA = 35°

    b). m∠GXO = 90°

    c). m∠GXT = 90°

    d). Since adjacent angles of a rhombus are supplementary,

         m∠OGT + m∠GTA = 180°

         70° + m∠GTA = 180°

         m∠GTA = 110°

         m∠GTO = [tex]\frac{1}{2}(m\angle GTA)[/tex]

                        = [tex]\frac{1}{2}(110^{\circ})[/tex]

                        = 55°

     e). Since, opposite angles of a rhombus are equal,

          m∠OGT = m∠OAT = 70°

     f). m∠GOA = m∠GTA = 110°

help please i’ve been in here for hours looking for answers

Answers

Answer:  Second row

The y intercept is 2

=============================================================

Explanation:

The y intercept always occurs when x = 0. Visually, the y intercept is the location where the graph crosses the y axis.

In the table, we see that x = 0 pairs up with y = f(x) = 2 in the second row. So we can say that the y intercept is 2.

Side note: the x intercept is 1 since it occurs when y = 0.

The second row is correct

Instructions: Given the following constraints, find
the maximum and minimum values for z.
x + 3y < 0
Constraints:
x - y = 0
3x - 7y < 16
Optimization Equation: z = -x + 5y
Maximum Value of z: 0
Minimum Value of z:

Answers

Answer:

The answer is below

Step-by-step explanation:

Given the constraints:

x + 3y≤ 0; x - y ≥ 0 and 3x - 7y ≤ 16.

We have to first plot the constraints using the geogebra online graphing tool. Plotting the constraints gives the solution as:

A(0, 0), B(3, -1) and C(-4, -4).

Next using the optimization equation: z = -x + 5y

At point A(0, 0); z = -0 + 5(0) = 0

At point B(3, -1); z = -3 + 5(-1) = -8

At point C(-4, -4); z = -4 + 5(-4) = -24

Hence the maximum value of Z is 0 and the minimum value of Z is -24.

The sum of two consecutive even numbers is 50. Find the two numbers
25 and 25
40 and 10
24 and 26
16 and 34

Answers

First even =24

Second even =26

let 2x be the first even integer
let 2x+2 be the second even integer
2x+(2x+2)=50
4x=48
x=12

First even integer
2x=2(12)=24
Second even integer
2x+2=2(12)+2=26

Answer:

First even = 24

Second even = 26

Step-by-step explanation:

let x be the first even integer.

let 2x be the second even integer.

[tex]x + 2x = 50[/tex]

[tex]x + x = 50 - 2 [/tex]

[tex]2x =48[/tex]

[tex]x = \frac{48}{2} [/tex]

[tex] x = 24[/tex]

Therefore, The first even number is 24.

[tex]second \: \: number= 50 - x \\ = 50-24 \\ = 26[/tex]

Therefore, The second even number is 26.

Hope it is helpful...

Two numbers are respectively 40% and 60% more than a third number. The ratio of the two numbers is:

Answers

Answer:

7:8

Step-by-step explanation:

calculate the value of x in circle O. *show your work*​

Answers

Answer:

Step-by-step explanation:

The central angle is twice as big as any angle sharing the endpoints  with the central angle of a chord where the angle is not below the smaller sector.

2*62 = x

x = 124

Find the value of both variables.

Answers

[tex] \cos(45) = \frac{5 \sqrt{2} }{x} \\ \frac{1}{ \sqrt{2} } = \frac{5 \sqrt{2} }{x} \\ x = 10 \\ \\ \tan(45) = \frac{y}{5 \sqrt{2} } \\ 1 = \frac{y}{5 \sqrt{2} } \\ y = 5 \sqrt{2} [/tex]

I hope I helped you ^_^

Find the value of m.

A. 7
B. 2
C. 42
D. 14

Answers

Answer:

A. 7

Step-by-step explanation:

3m + 21 = 6m

Move variables to one side to get:

3m + 21 = 6m

-3m         -3m

21 = 3m

Then isolate variable by dividing by 3

21/3 = 3m/3

m = 7

Choice A is the correct answer

30 POINTS PLEASE HELP
2. Given the list of measures of EXTERIOR angles (missing one) of a polygon, find the missing angle:
a. ___, 92°, 28°, 55°, 75°, 55°
b. ___, 71°, 69°, 40°, 62°
c. ___, 120°, 38°, 80°
d. ___, 90°, 60°, 40°, 30°, 60°, 30°

Answers

Answer:

a,55

b,118

c,122

d,50

Step-by-step explanation:

sum of exterior angles of a polygon ends up to 360°. add the numbers given in each case and subtract from 360° to get the missing angle.

Other Questions
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