Find the solution to the system of linear equations.
2x – 4y = -10
-2x – y = 0
type your answer...
type your answer...

Answers

Answer 1

Answer:

     x = -1          y = 2

Step-by-step explanation:

Notice that the coefficients of x are opposites of each other.  That makes the problem so much easier to solve.  All you have  to do is add the two equations and the x terms will be eliminated.

2x - 4y = -10

-2x - y = 0

    - 5y = -10

        y = 2        Substitute y = 2 into the first equation.  2x - 4(2) = -10

                                                                                          2x - 8 = -10

                                                                                               2x = -2

                                                                                                 x = -1

It is always a good idea to check your results into the equations to see if they satisfy the equations.

   


Related Questions

8TH GRADE MATHHH
PLEASE HELPP

Answers

Answer:

x = 36°

Step-by-step explanation:

There are 180° on a line so 180° - 126° = 54°

54° is one of the angles and so is 90° (because it is a right angle)

Therefore, now we know that x = 180° - (54° + 90°)

54° + 90° = 144°

180° - 144° = 36°

x = 36°

Answer:

x = 36

Step-by-step explanation:

solution:

we have given,

            in the right angled triangle.

             exterior angle = [tex]126^{o}[/tex]

we know,

          exterior angle = sum of interior non adjacent angle

   so,   [tex]126^o[/tex] = [tex]x + 90^o[/tex]    [∵ one angle of right angled triangle is [tex]90^o[/tex]]

     or,  [tex]x = 126^o - 90^o\\[/tex]

     or,  [tex]x = 36^o[/tex]

hence, the value of x is [tex]36^o[/tex]

             

-6 + x = 4x pls help ! ​

Answers

Answer:

Step-by-step explanation:

Alright so we are going to be simplifying here

-6 + x = 4x Flip sides

x-6=4x

After that,

x-6=4x  Subtract 4x from both sides

-3x-6=0

Step 3

-3x-6=0  Add 6 to the sides

-3x=6

Step 4

-3x=6  Divide the sides by 3

-2

So therefore,

Your answer would be x=-2

Help ASAP I’ll mark you as brainlister

Answers

Answer:

76 units

Step-by-step explanation:

In the given figure, a circle with center Q is inscribed in triangle AHD.

Let the circle with center Q touches the side HD at point N.

So, AT & AM, DM & DN and HT & HN are tangents drawn from external points A, D and H respectively.

Since, measure of tangsnts drawn from external point to a circle are equal.

Therefore,

AM = AT = 18

HN = HT = 8

DM = DN = 12

AH = AT + HT = 18 + 8 = 26

AD = AM + DM = 18 + 12 = 30

HD = DN + HN = 12 + 8 = 20

Perimeter of triangle

= AH + AD + HD

= 26 + 30 + 20

= 76 units

Which expressions are equivalent to z + (z + 6)z+(z+6)z, plus, left parenthesis, z, plus, 6, right parenthesis ?

Answers

Answer:

5 lolsjjhgjh h h gh h h hh f ggugy

i need help with #3 & #4

Answers

Step-by-step explanation:

Q3, B

Q4, I'm not too sure about this one but I think its D

Line j passes through points (9, 6) and (6, 8). Line k passes through points (7, 9) and (5, 6). Are line j and line k parallel or perpendicular?

Answers

9514 1404 393

Answer:

  perpendicular

Step-by-step explanation:

A graph shows the lines are not parallel. The lines are perpendicular.

__

j has a slope of -2/3 (down 2 for each 3 to the right)

k has a slope of 3/2 (up 3 for each 2 to the right)

These slope values have a product of 1, typical of perpendicular lines.

What is the mode, mean, median for these numbers?
{18,18,63,63,84}

Answers

Answer:

Mean= the average of the number set= 18+18+63+63+84=246/5=49.2

Median- the number in the middle of the set= 63

Mode- the number(s) that repeat=1 8, 63

Range- the amount between the highest and lowest numbers= 84-18=66

Step-by-step explanation:

The mode, mean, and median of the data will be 18 or 63, 49.2, and 63, respectively.

What are statistics?

Statistics is the study of collection, analysis, interpretation, and presentation of data or discipline to collect and summarise the data.

The data set is given below.

18, 18, 63, 63, 84

The mode of the data is given as,

Mode = Frequency of the repeated number

Mode = 18 and 63

The mean of the data is given as,

Mean = (Sum of observations) / (Number of observations)

Mean = (18 + 18 + 63 + 63 + 84) / 5

Mean = 246 / 5

Mean = 49.2

The median of the data is given as,

Median = (n + 1)th / 2

Median = (5 + 1)th / 2

Median = 6th / 2

Median = 3th

Median = 63

The mode, mean, and median of the data will be 18 or 63, 49.2, and 63, respectively.

More about the statistics link is given below.

https://brainly.com/question/10951564

#SPJ2

f f(x) = 3x, calculate f(4).
help

Answers

Answer:

f(4) = 12

Step-by-step explanation:

To evaluate f(4), substitute x = 4 into f(x) , that is

f(4) = 3 × 4 = 12

The complementary angle of 43° is _____. Write the equation to solve for the angle.

Answers

Answer: 43 + x = 90

Step-by-step explanation:

43 + x = 90

x = 90-43

x = 47

8TH GRADE MATH PLS HELP

Answers

The answer is 17
180-163=17

Answer: x = 152% hope this will help

Step-by-step explanation:

If u moved the angle down you will find out what the answer to x is

Examine the figure below. If ABC is similar to the DEF, determine the measure of

Answers

Answer:

22 degrees is the answer

Step-by-step explanation:

Simplify 6 - 3y + (-8y) + 5.2.

Answers

Answer:

−11y+11.2

Step-by-step explanation:

Find 3 rational numbers between 3/7 and 13/7​

Answers

Answer:

5/7 , 6/7 , 8/7

I hope im right!!

I NEED SOMEONE TO ANSWER PLZZZ!!!

Answers

Answer:

THE ANSWER IS (B)

Step-by-step explanation:

Answer:

B! Because remainder means extra things in an equation. You'll learn it in the future as decimals.

1. Identify the most reasonable unit to measure the volume of a tumbler.
2. Which is the closest to the weight of a tomato?
3. Identify the most reasonable unit to measure the volume of a small bottled water.
4. Identify the most reasonable unit to measure the time it takes to fly from Davao to Cebu.
5. Jeffrey is driving his car. Approximate the amount of time it takes to drive from San Pedro
Cathedral to Gaisano mall.
6. Which is the closest to the height of a door?
7. Estimate the measurement of the angle:​

Answers

Answer:

1. Gram

2. Kilogram

3. Millilitre

4. Hour

5. Minute

6. Feet

7. Radian

Explanation :

1.Gram

Because - For small quantity, the most reasonable unit is gram.

2.Kilogram  

Because - For large quantity , the most appropriate unit is kilogram.

3. Millilitre  

Because - For small volume , the most appropriate unit is millilitre.

4.Hour

Because - For large amount of time , the most appropriate unit is hour.

5.Minute

Because - For small amount of time , the most appropriate unit is minute.

6.Feet  

Because - For large height , the most appropriate unit is feet.

7.Radian

Because - For angle , the most appropriate unit is degree or Radian

Answer:

that my answer

Step-by-step explanation:

hope it helps

Given the following rectangle: Solve for x.
10x - 43
3x + 6

Answers

Answer:

x=9

Step-by-step explanation:

I basically just used the bottom left corner and since all of them are 90 degrees, i did 90-18 then i got 72 and i just divided it by 8 and got 9.

Hope this helps!

Answer:

The value of (x) is 19

Step-by-step explanation:

8x - 18 = 4x + 58

4x = 76

x = 19

I hope this is help :) "please tell me if that false"

8th grade math, please help.

Answers

Answer:

The x= 57

Step-by-step explanation:

They are exterior angles so they have to be the same.

Answer:

57

Step-by-step explanation:

x and the 57° angle are alternate exterior angles of two parallel lines cut by a transversal, so they are congruent.

x = 57

A triangle has side lengths of (3.7b+ 1.7) centimeters, (1.3b + 1.1) centimeters,
and (7.1c +5.1) centimeters. Which expression represents the perimeter, in
centimeters, of the triangle?

Answers

Perimeter of Triangle -:

( 3.7 b + 1.7 +1.3b +1.1 + 7.1 c + 5.1 )

now solve by ur self

Find x
Need help fast please !!

Answers

Answer:

[tex] x = 4 \sqrt{3} [/tex]

Step-by-step explanation:

By Pythagoras Theorem:

[tex] {x}^{2} = {( \sqrt{8 \times 4}) }^{2} + {(4)}^{2} \\ \\ {x}^{2} = {( \sqrt{32}) }^{2} + {(4)}^{2} \\ \\ {x}^{2} = 32 + 16 \\ \\ {x}^{2} = 48 \\ \\ x = \sqrt{48} \\ \\ x = \sqrt{ {4}^{2} \times 3} \\ \\ x = 4 \sqrt{3} [/tex]

A stadium currently has a seating capacity of 15400 seats. i) Calculate the number of people in the stadium when 75% of the seats are occupied

Answers

Answer:

11550

Step-by-step explanation:

someone wanna help me fill this out? ​

Answers

Answer:

what is it?

Step-by-step explanation:

sin40 cos40 / cos 10

Answers

Answer:

0,487925581

Step-by-step explanation:

guess I tried

Answer:

0.59225502205

Step-by-step explanation:

I guess this might be ok

someone please help me.

Answers

Answer:

All

Step-by-step explanation:

The answer is 1, 2, 3

I, II, III

Factorise...
3x2 - 6x

Answers

How to solve your question-  3 2 − 6

Grouping

The Common factor- 3 2 − 6         3 ( 2 − 2 )Rewrite in factored form- 3 ( 2 − 2 )         3 ( − 2 ) ⋅  

Solution-  3 ( − 2 ) ⋅

plz help.................

Answers

1) question 1 has been done for you

2) step one: square the two numbers that aren’t the hypotenuse(the longest side-opposite the right angle).
Step two: add the two numbers together
Step three: square the hypotenuse

If the two values squared and added together equal the hypotenuse squared then it is a right angled triangle.

3) a triangle with the side lengths of 11cm, 13cm and 15cm wouldn’t be a right angled triangle.

Because 11^2 + 13^2 = 290 and 15^2 = 225, therefore it isn’t a right angled triangle because 290 doesn’t equal 225.

Can someone help me?! The picture is below you don’t have to explain if you don’t want to!!

Answers

Answer:

(a) 3:4

(b) 3:4

(c) 9:16

Step-by-step explanation:

(a) The ratio of the sides would be 15:20 but after you simplify them (divide by 5), you'd get 3:4

(b) The ratio of the perimeter would be 60:80 because you're multiplying each side length by 4. When you simplify this again (divide by 20), however, it becomes 3:4 again

(c) To find the area, you would multiply the width times height, the ratio would be 225:400. You would get the greatest common factor which is 25 and divide it on both sides to get 9:16

help please due in 45 mins pleaseee helpppppp omg

Answers

Answer:

1. 0.6

2. 0.08333

.

.

.

.

i hope this helps

Answer:

I can't exactly show the work very well or in the way you want but I can answer the question...

Step-by-step explanation:

3/5 as a decimal is 0.6 and 1/12 as a decimal is 0.08333 (it goes on forever)

Hope this helps!

Mrs. Zarate is 4 feet 11 inches tall. If there are 2.54 centimeters
in an inch, what is her height in centimeters?

Answers

Answer:

149.86 cm

Step-by-step explanation:

4 ft 11 in = 59 inches

2.54(59) = 149.86

Answer:

149.86

Step-by-step explanation:

Line BD is tangent to a circle with diameter AB. Explain why the measure of angle BCA must equal the measure of angle ABD.

Answers

Answer:

This is because angles inscribed in a semicircles are 90 degrees (BCA)

The tanget of that circle is also a 90 degree angle to the diameter (ABD)

Therefore they're both 90 degrees

The measure of angle BCA must equal the measure of angle ABD should be that angle should be  inscribed in a semicircles that are 90 degrees,

What is the inscribed angle?

In terms of geometry, an inscribed angle refer to the angle that should be created in the interior of a circle  at the time when two chords should be intersect on the circle. It can also be refer to the angle subtended at a point on the circle via two given points on the circle.

Also, angle should be  inscribed in a semicircles that are 90 degrees,

learn more about an angle here: https://brainly.com/question/5366669

A ship is 350 feet from lighthouse which is 40 feet tall, find the angle of depression from the top of the lighthouse to the ship.

Answers

Answer:

6.519801752°

Step-by-step explanation:

Let θ represent the angle of depression

tanθ=40/350

θ=tan^-1(40/350) *tan^-1 means inverse tan*

θ=6.519801752°

6.52 degrees is the correct answer
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