Mathematics High School

Solve the following system of equations for x
2x-y=4
y-x=4

Answers

Answer 1

Answer:

What do i do???

Step-by-step explanation:

Answer 2

Answer:

x = 8

y = 12

Step-by-step explanation:

Given equations are -

2x - y = 4         .......(1)

-x + y = 4         ........(2)

Add both equations, we get

2x - y + (-x + y) = 4 + 4

⇒2x - y - x + y = 8

⇒x = 8

Now,

Put the value of x in equation (2), we get

y - 8 = 4

⇒y = 4 + 8

⇒y = 12

∴ we get

x = 8

y = 12

Related Questions

Estimate the perimeter and the area of the shaded figure to the nearest whole number in square units.

Answers

Answer:

perimeter= 8+8=16 units

area = 16+8=24 sq units

enter the coordinates of the point on the unit circle at the given angle 180 degrees

Answers

the coordinates of the point on the unit circle at the given angle 180 degrees is (-1,0)

The coordinates of the point on the unit circle at the given angle 180 degrees is (-1, 0).

What is a unit circle?

A unit circle is just a circle that has a radius with a length of 1. A unit circle can be used to define right triangle relationships known as sine, cosine and tangent. These relationships describe how angles and sides of a right triangle relate to one another.

The given drawing is the graph of the unit circle on the X – Y Coordinate Axis.

It can be seen from the graph, that the unit circle is defined as having a Radius ( r ) = 1.

Going from Quadrant I to Quadrant IV, counter clockwise, the Coordinate points on the axis of the unit circle are:

(1, 0), (0, 1), (-1, 0), and (0, -1)

This is important to remember when we define the X and Y Coordinates around the unit circle. The Unit Circle has 360°. In the given graph, the Unit Circle is divided into 4 Quadrants that split the unit circle into 4 equal pieces. Each piece is exactly 90°.

From the diagram we can clearly say that the coordinates of the point on the unit circle at the given angle 180 degrees is (-1, 0).

Find out more information about unit circle here

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I need help ASAP please

Answers

Answer:

True, false, true

Step-by-step explanation:

Because the minimum value of f(x) is -1, and the minimum value of g(x) us -25. It comes only once.

Roots are the points on the x - axis or when the x is 0. The roots of f(x) are positive.

f(0) means when x is 0, so f(0) = 3 or 5, and g(0) = -24

What generalization can you make about these numbers?
2, 5, 11, 19, 29

A. They are all even.
B. They are all evenly divisible by 2.
C. They are all prime.
D. They are all odd.

Answers

I think it is c. They are all prime numbers

5x+ 10y =300

what is x and y?​

Answers

Answer:

5x + 10y + -10y = 300 + -10y

Step-by-step explanation:

Tori drew a scale drawing of a picnic area near the river. The scale she used was 1 inch : 2 yards. If the picnic area is 47 inches wide in the drawing, how wide is the actual picnic area?

Answers

Answer:

94 yards

Step-by-step explanation:

2x47=94

Allison drew 3 triangles, 5 hexagons, and 4 octagons.
How many line segments did she draw?

A. 81
B. 72
C. 71
D. 68

Answers

Answer:

D 68

Step-by-step explanation:

I think that's the answer

Answer:

71

Step-by-step explanation:

3×3 = 9

5×6 = 30

4 × 8 = 32

30+32+9= 71

Find the zeros of the function. Enter the solutions from least to greatest. f (x)=(x -3)(2x -8)f(x)=(x−3)(2x−8)f, left parenthesis, x, right parenthesis, equals, left parenthesis, x, minus, 3, right parenthesis, left parenthesis, 2, x, minus, 8, right parenthesis \text{lesser }x =lesser x=start text, l, e, s, s, e, r, space, end text, x, equals \text{greater } x =greater x=start text, g, r, e, a, t, e, r, space, end text, x, equals

Answers

Answer:

Step-by-step explanation:

The zeros are the values of x for which f(x) = 0.

f(x) = (x-3)(2x-8) = 0

x = 3, 4

What is the quadratic equation if the zeroes of the function are -2 and 6?
a) 2x^2+4x-12=0
b) x^2-4x-12=0
c) x^2+4x-12=0
d) 2x^2-4x-12=0​

Answers

Answer:

B.

Step-by-step explanation:

x = -2 or x = 6

(x + 2) or (x - 6)

(x+2)(x-6)

X² - 4x - 12 = 0

Please answer quickly. I need help bad

The equation y-3=-2(x+1) represents a line. Which best describes the line?
A. slope: 4, passes through (1, -2)
B. slope: -2, passes through (-1,3)
C. slope 2, passes through (-3, 1)
D. slope 4. passes through (2, -1)

Answers

Answer:

B

Step-by-step explanation:

assume f is a one to one function of f(x)= 4-6x find f^-1(-32)​

Answers

Answer:

f^-1(-32)=6

Step-by-step explanation:

Find the inverse of the function f(x)=4-6x:

f(x)=4-6x

y=4-6x

x=4-6y

x-4=-6y

(x-4)/-6=y

-1/6x+2/3=y

y=-1/6x+2/3

f^-1(x)=-1/6x+2/3

Plug in f^-1(-32) for f^-1(x) and simplify:

f^-1(-32)=-1/6(-32)+2/3

f^-1(-32)=16/3+2/3

f^-1(-32)=18/3

f^-1(-32)=6

Which angles are vertical angles?

Answers

Answer:

Step-by-step explanation:

BCF and DCA


BCF and DCA
Just a bit of context : Vertical angles are angles that are opposite to each other, where the two lines cross.

I need help asap, I will report any links or files from bit. ly

Jared flicked the arrow on his spinner 4 times, and the arrow landed on the green each time. if Jared spins the arrow a fifth time, what is the theoretical probability that it will land on green?

OA. 3/8
OB. 1/8
OC. 4/5
OD. 1/5​

Answers

Answer:

I think the answer for that question is c

Evaluate f(-2): SHOW ALL WORK
f(x) = 3/2x -4?

Answers

Answer:

-7

Step-by-step explanation:

f(-2) = 3/2(-2) - 4

f(-2) = -3 - 4

f(-2) = -7

Answer:

f(-2) = -7

Step-by-step explanation:

f(-2) means that for every x given in the equation, -2 would be substituted in it's place. Therefore;

[tex]f(-2)=\frac{3}{2} (-2) - 4[/tex]

f(-2) = -3 - 4

f(-2) = -7

Hope this helps!

How does the standard deviation and mean change when you remove the greatest value from the data set?

Help me

Answers

Answer: the standard deviation decreases

Step-by-step explanation:

A cylindrical barrel has a height of 5 feet and a diameter of 4 feet. What is the approximate volume of the barrel?

Answers

Answer:

62.8 ft³

Step-by-step explanation:

Volume = π · r² · h

V = 3.14 · 2² · 5

V = 3.14 · 4 · 5

V = 62.8

please help me with this problem

Answers

9.75 and 10.2 is most likely the answer because they are both in other answers

Lyla is playing a game in math class where the students describe a number they are thinking of and the class uses clues to determine which type of number it is. Lyla tells her class that she is thinking of a positive number with infinitely many nonrepeating digits after the decimal point. Which type of number is Lyla thinking of?Single choice.
(1 Point)

1. whole
2. integer
3. rational
4. irrational

Answers

Answer:

1 or 3 sorry if wrong

Step-by-step explanation:

Find the area of the composite figure 7m 5m 4m 3m

Answers

Answer:

19 m

Step-by-step explanation:

Hope it helps. Just add them together

Find the slope of the line and that passes through (7, 2) and (-7, 48)

Answers

Answer:

-23/7

Step-by-step explanation:

y2 - y1 / x2 - x1

48 - 2 / -7 - 7

46 / -14

= -23/7

Someone please help me in this please.

Answers

Answer:

for the number 13

Step-by-step explanation:

[tex]x = \sqrt{9 { }^ {2} + 6 { }^{2} }[/tex]

by Pythagoras theorem

x= √81+36

x= √117

punch square root of 117 with a calculator, I don't have one now

For triangle DEF, the length of side e and the measures of angles D and F are known. What method should be used to start solving triangle DEF?
A.law of sines
B.both laws can be used
C.neither law can be used
D.law of cosines

Answers

Answer: D. Law Of Cosines

Step-by-step explanation: A law in trigonometry: the square of a side of a plane triangle equals the sum of the squares of the remaining sides minus twice the product of those sides and the cosine of the angle between them.

Note: Answer is confirmed by Buzz/Acceleration Education.

All My Other Answers:

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The sum of the interior angle of the triangle is 180 degrees. Then by the sine rule, angle E can be determined. Then the correct option is A.

What is trigonometry?

Trigonometry deals with the relationship between the sides and angles of a right-angle triangle.

For triangle DEF, the length of side e and the measures of angles D and F are known.

We know that the sum of the interior angle of the triangle is 180 degrees. Then the angle E can be determined.

Hence the sine rule is easy to apply.

More about the trigonometry link is given below.

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What is the y-intercept of the graph of x=9y-5

Answers

Answer:

(0,5/9)

Step-by-step explanation:

Reuben and Jim made the most points in the basketball game. Reuben made twelve points. Jim made twice as many points as Reuben. How many points did Jim make?
A. 36
B. 24
c. 18
D. 12
E. 6 ​

Answers

Answer:24

Step-by-step explanation:

12x2=24

IF SOMEONE WILL HELP NOW THIS WILL BE A MIRACLEEEEE

Answers

Answer:  x < -5

Move the constant to the right, calculate, and divide both sides.

Find the measure of the indicated angle. Round to the nearest tenth.
14
3
00
9
CC

Answers

Answer:

picture??

Step-by-step explanation:

Answer:

9 is the answer of this question

Pleaseeee helppp mehhhhh!!

Answers

The answer is D, 4/3 x 3.14 x 2^3
D hun I’m pretty sure

Stephanie borrowed $4,500 at a simple interest rate of 3.5% to buy a motorcycle. How much interest did she have to pay if the loan was taken out for 3 years?

Answers

C

Step-by-step explanation:

hope this helps

Of the 800 participants in a marathon, 120 are running to raise money for a cause. How many participants out of 100 are running for a cause

Answers

Im not sure about this question but- 120% of 800 equals- 15%, so 15% could be the answer

What is the domain of f(x) = 5- 7?
O x | x>-7)
O {x | X <-7}
0 {x|x>0}
O x | x is a real number}

Answers

Answer:

c

Step-by-step explanation:

hi

The domain of f(x) = 5x - 7 is {x | x is a real number} and this can be denoted as (-∞, ∞) for all x ∈ R.

What is domain?

The domain is the set of all the input values given to a function.

Given is an expression f(x) = 5x - 7, we need to find the domain,

We know that,

The domain of any expression is set to all the real numbers, except where the expression is undefined.

Therefore, the domain is all real numbers.

Also,

The graph of the function will be a straight line without discontinuities.

Hence the domain of f(x) = 5x - 7 is {x | x is a real number} and this can be denoted as (-∞, ∞) for all x ∈ R.

Learn more about domain click;

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