2x+5y=25 3x-y=12 con metodo de sustitución​

Answers

Answer 1

Answer:

x = 5, y = 3

Step-by-step explanation:

2x + 5y = 25

3x - 1y = 12

we can multiply the second equation by 5 and then add it to the first equation, which will allow us to solve for 'x'; then we solve for 'y'

5(3x - 1y) = 12(5)

15x - 5y = 60

   2x + 5y = 25

+  15x - 5y = 60

17x = 85

x = 5

plug '5' in for 'x' to solve for 'y':

2(5) + 5y = 25

10 + 5y = 25

5y = 15

y = 3


Related Questions

What is the product of 0.15 x 0.32? *

Answers

Answer:

0.048

Step-by-step explanation:

Answer:

The answer to 0.15 x 0.32 is 0.048

amara needs $624 for her budget every week. She works 40 hours a week.CLEARCHECKWhat is the minimum amount Tamara needs to earn per hour?$per hour

Answers

She needs to earn at least about 16$ every hour

15.6 or

Step-by-step explanation:

Based on the given conditions, formulate:

624 ÷ 40

Reduce the fraction:

get the result:

15.6 or

Answer:

15.6 or

(Hope this helps can I pls have brainliest

Write the system of equations below as a matrix

{2x - 7y = 4
{x - 3y = 3​

Answers

x1=2x2=1y1=-7y2=-3c1=4c2=3

Matrix:-

[tex]\\ \sf\longmapsto \left[\begin{array}{ccc}\sf 2 &\sf -7 &\sf 4\\ \sf 1&\sf -3 &\sf 3\end{array}\right][/tex]

The diagram shows a trapezium.
B
D
Diagram NOT accurately drawn
AD = x cm.
BC is the same length as AD.
AB is twice the length of AD.
DC is 4 cm longer than AB.
The perimeter of the trapezium is 38 cm.
Work out the length of AD.

Answers

Perimeter implies the total length of sides of a given figure. Thus the length AD = 4.75 cm.

A plane figure is any type of figure bounded by four straight sides. Examples are square, rectangle, trapezium, rhombus, etc. A trapezium is a type of plane figure which belongs to a family referred to as quadrilaterals.

The perimeter of a given shape is the sum of the length of its boundaries or sides.

Thus the length AD required in the question can be determined by:

AD = x cm

BC = x cm

AB = 2x cm

DC = 4x cm

Perimeter = AD + BC + AB + DC

                 = x + x + 2x + 4x

Perimeter = 8x

But the perimeter of the trapezium has been given as 38 cm.

Thus,

38 = 8x

x = [tex]\frac{38}{8}[/tex]

  = 4.75

Therefore, the length of AD is 4.75 cm.

For more clarifications on the perimeter of a given shape, visit: https://brainly.com/question/12263031

#SPJ1

In AFGH, GH = FG and mZF = 10°. Find mZH.

Answers

Answer:

f(x)= 40x

Step-by-step explanation:

Hope this helps, have a nice day/night! :D


The figures in the oval on the left are parallelograms. The figures in the oval on
the right have sides that are equal. In which section should a rhombus be
placed?
A
Parallelograms
Equilateral
B
С
square
rectangle
D
regular
pentagon
section D
section A
1) section c
section B

Answers

Answer:

The answer is C

Step-by-step explanation:

Factorizing by grouping

xy + 2x + 3y + 6

Answers

Answer:

(x+3)(y+2)

Step-by-step explanation:

(xy+2x)+(3y+6)

x(y+2)+3(y+2)

(x+3)(y+2)

very simple ill give brainlist

Answers

Answer:

100

Step-by-step explanation:

lxw=a

and 5x2+10, so basically just use the area formula with 10 as the values

Answer:

If each side of the square was doubled then you would have a square of 10 cm on each side

the answer is 100

Step-by-step explanation:

5 * 2 = 10

10 * 10 = 100

WILL MARK BRAINLIEST IF CORRECT!

Answers

Answer:

Answer Student A was right.

[tex]{ \tt{ \sqrt[3]{1944} = \sqrt[3]{(72 \times 27)} }} \\ \\ = { \tt{ \sqrt[3]{72} \times \sqrt[3]{27} }} \\ \\ = { \tt{ \sqrt[3]{72} \times 3}} \\ \\ = { \underline{ \tt{ \: 3 \sqrt[3]{72} } \: }}[/tex]

Quadrilateral ABCD has the following
vertices:
A(2, 7)
B(8,1)
C(1, -9)
D(-6, -2)
Is quadrilateral ABCD a parallelogram, and
why?

Answers

Answer:

No because the angle of point C is NOT congruent to the angle of point A.

Step-by-step explanation:

A quadrilateral MUST be a parallelogram if it has both pairs of its opposite angles congruent.

plz help will mark as brainliest​

Answers

10

Explanation:
10/2 = 5

Noah receives a $5 discount each month on his cell phone bill because he signed up for
auto-pay from his bank account. Over the last 8 months, Noah has paid a total of
$280 for his cell phone bill. What would Noah be charged for his cell phone bill each
month if he stopped using auto-pay?
$34
$30
$35
$40

Answers

Answer:

Noah would pay $40 each month

The discount Noah received decreased the amount he pays by $5 every month.

Total discount in 8 months = 8 x $5 = $40

If Noah stopped using autopay, he would have to pay the full amount

Without the discount, the total amount Noah would pay in 8 months = amount paid without discount + total discount amount

$280 + $40 = $320

Amount Noah would pay per month = Total amount he pays in 8 months without discount / 8

$320 / 8 = $40

if you subtract 15 from a number and multiply by-6, the result is -54. What is the number?​

Answers

Answer:

24

Step-by-step explanation:

You do the opposite of whats states -54 divided by -6 because it says the number was multiplied which gives us 9 then since 15 was subtracted we instead add 15 which equals 24.

Answer:

the number is -5.7

Step-by-step explanation:

do everything in reverse operations,

-54 divided by -6= 9.3

9.3-15= -5.7

For proof you can do it yourself on a calculator.

solve pls brainliest

Answers

Answer:

76%

Step-by-step explanation:

to make this a percentage we need to make the denominator 100. luckily 25*4=100, so multiply 19/25 by 4/4 to get 76/100. so our percentage is 76

Answer:

76%

Step-by-step explanation:

percent is out of 100, so 19*4/25*4=76/100=76%

A line contains the points (-3,-9) and (4,5). What is the point-slope form of the line? A. y + 9 = -2 (x + 3)
B. y - 5 = 3 (x - 2)
C. y - 9 = 2 (x + 3)
D. y + 9 = 2 (x + 3)​

Answers

Answer:

D

Step-by-step explanation:

First find the slope.

[tex]Slope=\dfrac{y_{2}-y_{1}}{x_{2}-x_{1}}\\\\=\dfrac{5-[-9]}{4-[-3]}=\dfrac{5+9}{4+3}\\\\\\=\dfrac{14}{7}=2[/tex]

Point slope form:

y - y1 = m(x -x1)

y -[-9] = 2 (x - [-3])

y +9 = 2 (x + 3)

solve 6(8y-8)×(8³+8)
with solution​

Answers

Answer:

24960(y-1)

I'm so glad to help you with this question hope you get it

9-3 divided by 1/3 +1

Answers

The correct answer is 1.

Answer:

9-3/ 1/3 +1= 1

Step-by-step explanation:

PEMDAS

Over time, the value of a car decreases. If the value of a car purchased for Php
1,250,000 decreases to Php 1,000,000 throughout a year, what is the rate of change?

Answers

Answer:

-20%

Step-by-step explanation:

Current value of an item and divide it by the value from an earlier period. Subtract one and multiply the resulting number by 100 to give it a percentage representation.

ROC = (current value/previous value​ − 1) x 100

ROC = (1,000,000/1,250,000 - 1) x 100

ROC = (0.8 - 1) x 100

ROC = -0.2 x 100

ROC = -20

solve 3+x>-9 A) x >3 B) x > -6 C) x>-3 x > D) x> -3

Answers

Answer: the answer should be x>-12

Step-by-step explanation:

3+x>-9

x>-9-3

X>-12

If the simple interest on ​$1000 for 2 years is ​$​100, then what is the interest​ rate?

Answers

Answer:

R = 450%/year

Equation:

r = (1/t)(A/P - 1)

Converting r decimal to R a percentage

R = 4.5 * 100 = 450%/year

Jenerucshshhdhdhshshsdhhsbnjd

URGENT PLEASE HELP WILL MARK BRAINLIEST

Answers

Answer:

The correct answer will be option D.

Step-by-step explanation:

They both have a pretty fair chance of winning.

3x+5y=-9
-6x-10y=18
elimantion substuion method

Answers

Answer:

Infinitely many solutions

Step-by-step explanation:

2(3x + 5y = -9)

6x + 10y = -18

-6x - 10y = 18

0 = 0

E = (-52) + 13 + 49 + (-15) + (-36) + 82

Answers

Answer:

E = 41

Step-by-step explanation:

E = (-52) + 13 + 49 + (-15) + (-36) + 82

Take the -ve terms to one side and +ve terms to the other.

E = (13 + 49 + 82) - 15 - 36 - 52

E = 144 - 103

E = 41

What is the solution set of -12x=-74?

Answers

The solution to -12x = -74 is X = 6.16.

As for a set? Elaborate on what you mean by set please

What is the image of M(11,-4) using the translation (x,y)->(x-17,y+2?

Answers

Answer:

(-6, -2)

Step-by-step explanation:

What is 1/6 to the power of 3

Answers

Answer:

[tex]\frac{1}{216}[/tex]

Step-by-step explanation:

Exponents on fractions work like this:

[tex](\frac{x}{y} )^a=\frac{x^a}{y^a}[/tex]

Apply that to your problem:

[tex](\frac{1}{6} )^3\\\\\frac{1^3}{6^3} \\\\\frac{1}{216}[/tex]

Answer:

1/216

Step-by-step explanation:

1/6 x 1/6 is 1/36

1/36 x 1/6 is 1/216

Please help with this question.

Answers

Answer:

x=52º

Step-by-step explanation:

A triangle's angles are equal to 180º.

Given the opposite angle to H is 66º, we can find the opposite angle of angle I. The opposite angle of angle K is 62º, assuming that it is equivalent to the opposite angle of angle I we can solve for x.

66+62+x=180

Add 66 and 62.

128+x=180

Subtract 128 from both sides of the equation.

x=52

Angle x is equal to 52º.

Hope this helps :)

What is the slope in other words the answer

Answers

Answer:

gradient

Step-by-step explanation:

gradient is the same as steepness and slopes r steep so its gradient


The area of a triangle is 30 cm and its base
is 10 cm. What is the perpendicular height,
in cm, of the triangle?

Answers

Step-by-step explanation:

area of triangle,=1/2*base*height

30=1/2*10/h

h=6cm

Answer:  Height=6cm

Step-by-step explanation:

Area of triangle =30cm²

Base=10cm

Height=?

Area=1/2*base*height

30=1/2*10*height

Height=30*2/10

Height=6cm

Answer 5 and 6 please

Answers

Answer: 5) F:(1,-1)

6) W:(-3,-2)

Step-by-step explanation:

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