again i don't understand :(

Again I Don't Understand :(

Answers

Answer 1

Answer:

13) x=4, y=0

15) x= -3, y=1

Step-by-step explanation:

13. Label the 2 equations.

y= x-4 -----(1)

-4x -6y= -16 -----(2)

From (2): -2x -3y= -8 -----(3)

(divide by 2 throughout)

Subst. (1) into (3):

-2x -3(x-4)= -8

-2x -3x +12= -8 (expand)

-5x= -8 -12 (simplify, constant to 1 side)

-5x= -20 (simplify)

x= 4 (divide by -5 throughout)

subst. x=4 into (1):

y= 4 -4

y= 0

15. x= y -4 -----(1)

-2x +3y= 6 -----(2)

subst. (1) into (2):

-2(y-4) +3y= 6

-2(y) -2(-4)= 6 (expand)

-2y +8= 6

-2y= 6 -8 (bring constant to 1 side)

-2y= -2

y= 1 (divide by -2 throughout)

subst. y=1 into (1):

x= 1 -4

x= -3


Related Questions

Find the value of x in each case. Give reasons to justify your solutions!

H∈ IG

Answers

Answer:

x = 24°

Step-by-step explanation:

Lines JH and EG are the parallel lines and HF is a transverse.

∠JHF ≅ ∠HFE [Interior alternate angles]

m∠JHF = 2x

Since, m∠JHF = m∠JHG + m∠FHG

2x = m∠JHG + x

m∠JHG = 2x - x = x

Since m∠JHI + m∠JHG = 180° [Supplementary angles]

156° + m∠JHG = 180°

m∠JHG = 180 - 156

m∠JHG = 24°

x = 24°

Therefore, x = 24° will be the answer.

PLEASEEE HURRY!!
Evaluate the expression 3c (−2) d (−4) for c = 3 and d = 4. the number in parenthesis are exponents.

Answers

Answer:

288

Step-by-step explanation:

In the given expression, we can replace the given values for c and d

Since c is 3 and d is 4,

3c(-2)d(-4)

After substituting we multiply:

= 3*3*-2*-4*4

= (9)(-2*-4)*4

Two minuses become positive

So it'll be,

9*8*4

= 288

Here's ur answer

If you were to measure a person once a year, every year, from the ages of ten to twenty-five, would your ordered pairs
of age and height represent a function?
Ono
yes

Answers

Answer:

yes :) most ordered pairs would be a function.

Answer:

yes

Step-by-step explanation:

Most functions are already ordered pairs.

The sum of two numbers is 43. One number is five less than three times the other number. What is the largest number?

Answers

Answer:

31

Step-by-step explanation:

Let the numbers be x and y.

"The sum of two numbers is 43." gives us the first equation.

x + y = 43

"One number is five less than three times the other number." gives us the second equation.

y = 3x - 5

Now we solve the system of two equations below.

x + y = 43

y = 3x - 5

Since the second equation is already solved for y, we will use the substitution method. We substitute 3x - 5 for y in the first equation.

x + y = 43

x + 3x - 5 = 43

4x - 5 = 43

4x = 48

x = 12

The first number is 12. Now we find the second number.

x + y = 43

12 + y = 43

y = 31

The larger number is 31.

Answer:

31 is greater

Step-by-step explanation:

I will solve your system by substitution.

x=3y−5;43=x+y

Step: Solve x=3y−5 for x:

Step: Substitute 3y−5for x in 43=x+y:

43=x+y

43=3y−5+y

43=4y−5 (Simplify both sides of the equation)

43+−4y=4y−5+−4y (Add -4y to both sides)

−4y+43=−5

−4y+43+−43=−5+−43 (Add -43 to both sides)

−4y=−48

(Divide both sides by -4)

y=12

Step: Substitute12foryinx=3y−5:

x=3y−5

x=(3)(12)−5

x=31(Simplify both sides of the equation)

Answer:

x=31 and y=12

31 is greater than 12

BRAINLIEST ANSWER Twice the difference of a number and 4 is equal to three times the sum of the number and 6. Find the number.

Answers

Answer: -26

Step-by-step explanation:

2(n - 4)= 3(n + 6)

2n -8 = 3n + 18  

     +8          +8

2n = 3n + 26

-3       -3

-1n = 26

n= -26

A rectangular prism has a volume of 720 cubic units. How many unit cubes would fill the volume of the solid if they were packed without any gaps or overlaps?

Answers

Answer: 720 I think

Step-by-step explanation: Because if there are 720 cubic units, you can only fit 720.

There will be 720 cubes of side 1 unit that fill the prism if they were packed without any gaps or overlaps.

What is volumes?

Volume is defined as the space occupied within the boundaries of any three-dimensional solid.

Given that, a rectangular prism has a volume of 720 cubic units, we need to find that, how many unit cubes would fill the volume with the solid if they were packed without any gaps or overlaps,

So, to find the same, we will divide the volume of the prism by the cube.

Volume of the cube = side³ = 1³ = 1

Therefore, number of cubes to be fitted = 720 / 1 = 720

Hence, there will be 720 cubes of side 1 unit that fill the prism if they were packed without any gaps or overlaps.

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What is the domain?!

Answers

Answer:

x is equal to or greater then 3

Step-by-step explanation:

Answer:

X is equal to or greater than 3

Step-by-step explanation:

In the graph the curved arrow is pointed to the numbers below the line in the graph chart. Brainliest?

I REALLY NEED HELP YALL LIVES DEPEND ON IT!! plz help (ASAP )

Answers

Answer:

53%

49%

1 2

Step-by-step explanation:

540 / (540+470) = 0.5346

452 / (470+452) = 0.4902

Digital downloads of Album 1 :

470 / (540+470) = 0.4653

Digital downloads of Album 2 :

452 / (571+452) = 0.4418

(would really, reallly appreciate the brainliest)

Harvey bought a. Frame in which he put his family picture in what is the area of the frame not covered by the picture

Answers

Answer:

Area of the frame not covered with photo is equal to 129 square inches

Step-by-step explanation:

Given: Image of a frame

To find: Area of the frame not covered by the picture

Solution:

Area of rectangle = length of the rectangle × breadth of rectangle

Area of the frame = length of frame × breadth of frame = 23 × 15 = 345 square inches

Area of the frame covered with photo = 18 × 12 = 216 square inches

Area of the frame not covered with photo = Area of the frame - Area of the frame covered with photo = 345 - 216 = 129 square inches

Find the exact value of tan (-1740)°

Answers

Answer:

square root of 3

Step-by-step explanation:

Use calculator

The answer is square root of 3

brainlist and thanks if correct answer is screen shot

Answers

We can multiple the 2 to the other side making y = 8/10 which can be reduce to 4/5

Answer:

y = 8/5

Step-by-step explanation:

y /2 = 4/5

Multiply each side by 2

y/2 * 2 = 4/5 *2

y = 8/5

What is the area of the parallelogram? 144 in² 72 in² 50 in² 25 in²

Answers

Answer:

A = 144 in ^2

Step-by-step explanation:

To find the area

A = l*w

A= 9*16

A = 144 in ^2

Simply multiply the width (9) by the height (16) to get 144 inches squared.

4x - 2y = -2 6x + 3y = 27

Answers

Answer:

Step-by-step explanation:

4x - 2y = -2   ------------------(I)

6x + 3y = 27 ------------------(II)

Multiply (I) by 3 & multiply (II) by 2

(I)*3           12x - 6y = -6

(II)*2          12x + 6y = 54  { Now add &  y will be eliminated}

               24x          = 48

 x = 48/24

x = 2

Plugin the value of x in equation (I)

4*2 - 2y = - 2

8 - 2y = -2          {subtract 8 from both side}

-2y = -2 - 8

-2y = -10   {Divide both sides by -2}

y = -10/-2

y = 5

 

pls help asap!!!
Find the probability of being below 514 if the mean of a normal distribution is 474 and the standard
deviation is 32.

Answers

Answer:

Step-by-step explanation:

Let x be the random variable. Since it is normally distributed and the population mean and population standard deviation are known, we would apply the formula,

z = (x - µ)/σ

Where

x = sample mean

µ = population mean

σ = standard deviation

From the information given,

µ = 474

σ = 32

x = 514

The probability of being below 514 is expressed as P(x < 514)

For x = 514,

z = (514 - 474)/32 = 1.25

Looking at the normal distribution table, the probability value corresponding to area below the z score is 0.89

Therefore,

P(x < 514) = 0.89

15 pigs are entered in the "Best Pig" competition at the county fair. The
judges will award very special pigs with blue, red, and white ribbons. In how
many different ways can these ribbons be awarded to 3 of the 15 pigs?
A. 455
B. 3375
C. 45
D. 2730

Answers

Answer:

D.2730

Step-by-step explanation:

15x14x13=2730

Find the ratio that is equivalent to 10:5.
OA) 15:5
OB) 5:10
OC) 2:1
OD 5:1

Answers

Answer:

OB) 2:1

Step-by-step explanation:

5 can go into 10 twice and 5 can go into itself once

Answer:

2:1

Step-by-step explanation:

10:5= 2:1

If you divide both numbers by 5:

10/5:5/5  it equals to 2:1

An angle is bisected, forming two new angles. If the original angle had a measure of 14 degrees, what is the measure of each new angle?

Answers

Hello I think the answer would be 7

An angle bisector, bisects an angle into two equal small angles

14 divided by 2 is 7

Hope this helps :)

The measure of each new angle will be 7°.

Since we are given the information that the original angle had a measure of 14 degrees, then when the angle is bisected, forming two new angles, we have to divide the original angle by 2. This will be:

= 14°/2

= 7°

Therefore, the measure of each new angle will be 7°.

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what is the missing justification ?

Answers

Answer:C



Explanation:Symmetric property

A triangle has side lengths 3.4 cm, 4 cm, and 5.2 cm. The angle measures are 40°, 50°, and 90°.

What type of triangle is this triangle?


acute scalene

right isosceles

acute isosceles

right scalene

Answers

Answer:

right isosceles I'm pretty sure

The solution is Option D.

The triangle is a right scalene triangle

What is a Scalene Triangle?

A scalene triangle is a type of triangle with three different length sides and three interior angles that add up to 180 degrees. Scalene triangles have no equal of parallel sides , hence there is no line of symmetry. The interior angles of a scalene triangle can be acute , right or obtuse angles.

For a right angle triangle

From the Pythagoras Theorem , The hypotenuse² = base² + height²

if a² + b² = c² , it is a right triangle

if a² + b² < c² , it is an obtuse triangle

if a² + b² > c² , it is an acute triangle

Given data ,

The measures of the sides of the triangles are 3.4 cm , 4 cm and 5.2 cm

The measures of angles of triangle are 40°, 50°, and 90°

Since the triangle is having all its length and sides different , it is a scalene triangle

Now , For a right angle triangle

hypotenuse² = base² + height²

( 5.2 )² = ( 3.4 )² + ( 4 )²

( 5.2 )² = 11.56 + 16

( 5.2 )² = 27.56

Hence , the triangle is a right scalene triangle

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The following are the temperatures in °C for the first 10 days in January:
-4.2, -7.6, -2.3, -6.4, -3.3, 5.4, -7.7 ,-8.2 ,1.6 ,8.6
Calculate the range.

Answers

ok so to find the range it is the biggest subtracted from the smallest so it would be

8.6- -8.2= 16.8

I worked it out to be 16.8 hope this helps

Find the smallest positive integer k such that 360k is a cube number.

Answers

Answer: k = 75

Step-by-step explanation:

                360

                  ∧

             36   10

              ∧     ∧

           6  6   2  5

          ∧    ∧

        2 3  2 3

Prime factorization of 360 is: 2³ · 3² · 5

Since we want a perfect cube, every number must be to the power of 3.

That means we need  a 3 and 2 more 5s  to make a cube

k = 3 × 5 × 5

  = 75

Answer:

k = 75

Step-by-step explanation:

Factorize 360

360 = 36 * 10

      = 2 * 2 * 3 * 3 * 2 * 5

As 360k is cube number, k = 3 * 5 * 5

k = 75

360k = 360 * 75 = 27000 is a perfect cube

f h(x) = 2x + 1, find h(2x-3).

Answers

Answer:

h(2x - 3) = 4x - 5

Step-by-step explanation:

If h(x) = 2x + 1

h(2x - 3) = 2(2x - 3) + 1 = 4x - 5

Place the fractions 3 7 , 1 3 , 2 5 , and 3 8 in order from least to greatest.

Answers

Answer:

[tex]1/3,[/tex]  [tex]3/8,[/tex]  [tex]2/5,[/tex]  [tex]3/7[/tex]

Step-by-step explanation:

[tex]3/7 \approx 0.42857142857[/tex]

[tex]1/3 \approx 0.33333333333[/tex]

[tex]2/5 = 0.4[/tex]

[tex]3/8 = 0.375[/tex]

Answer:

1/3,3/8,2/5,3/7

Step-by-step explanation:

Which system of equations can be graphed to find the soultion(s) to x^2=2x+3

Answers

Answer:

[tex]\left \{ {{y=x^2} \atop {y=2x+3}} \right.[/tex]

Step-by-step explanation:

The system would be:

[tex]\left \{ {{y=x^2} \atop {y=2x+3}} \right.[/tex]

And I attached the graph. The system will have 2 solution (The 2 intercepts between the curves)

The function f is defined by f(x) = 2x²-1.
Find f (2x).

Answers

Answer: [tex]f(2x)=8x^2-1[/tex]

Step-by-step explanation:

All that is required here is to substitute x = 2x into the right side in the same way that is done for a numeric value.

[tex]f(2x) = 2(2x)^2-1\\f(2x) = 2(4)x^2-1\\f(2x) = 8x^2-1\\[/tex]

HELPPPPPPPPP
jonah earned $5 more than half of karen’s salary, k. which of the following expressions represents jonahs earnings.
Jonah earned $5 more than half of Karen's salary, k. Which of the following expressions represents Jonah's earnings?

one half(k + 5)
one halfk + 5
one half + k + 5
one halfk > 5

Answers

Answer:

one halfk + 5

Step-by-step explanation:

The expression (1/2)k + 5 represents Jonah's earnings option (B) one-half k + 5 is correct.

What is an expression?

It is defined as the combination of constants and variables with mathematical operators.

A linear equation can be defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.

It is given that:

Jonah earned $5 more than half of Karen's salary, k

Let Jonah's salary is J

J = 5 + (1/2)k

Or

= (1/2)k + 5

The above expression represents Jonah's earnings and the expression is a linear expression.

Thus, the expression (1/2)k + 5 represents Jonah's earnings option (B) one-half k + 5 is correct.

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PLEASEEEE ASAP I NEED HELP Drag the tiles to the correct boxes to complete the pairs.
Match the one-to-one functions with their inverse functions.
f(x)=3-17
f(x) = 1-10
fix)= 322
f(x) =
Inverse Function
Function
$-+()=56
s-lis) =
1-1(x)=1+10
311 +17)
(140) =

Answers

Answer:

in order to right to left

Step-by-step explanation:

4th

3rd

2nd

1st

The required functions are obtained as f(x) = x/5, f(x) = ∛(2x), f(x) = x - 10 and f(x) = 2x/3 - 17 respectively.

What is the inverse of a function?

The inverse of a function y = f(x) is defined as a function having range as the domain of the function f(x) and domain as the range. Mathematically it can be written as f⁻¹(y) = x which implies that f⁻¹(f(x)) = x.

The given problem can be solved as follows,

(a) f⁻¹(x) = 5x

Substitute x = f(x) to obtain,

f⁻¹(f(x)) = 5f(x)

=> x = 5f(x)

=> f(x) = x/5

(b) f⁻¹(x) = x³/2

Substitute x = f(x) to obtain,

f⁻¹(f(x)) = f(x)³/2

=> x = f(x)³/2

=> f(x) = ∛(2x)

(c) f⁻¹(x) = x + 10

Substitute x = f(x) to obtain,

f⁻¹(f(x)) = f(x) + 10

=> x = f(x) + 10

=> f(x) = x - 10

(d)  f⁻¹(x) = 3( x + 17)/2

Substitute x = f(x) to obtain,

f⁻¹(f(x)) = 3( f(x) + 17)/2

=> 2x = 3( f(x) + 17)

=> 2x/3 = f(x) + 17

=> f(x) = 2x/3 - 17

Hence, the functions for the given inverse functions are  f(x) = x/5, f(x) = ∛(2x), f(x) = x - 10 and f(x) = 2x/3 - 17 respectively.

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if a 10-pound turkey cost $20.42 how much does a 21-pound turkey cost

Answers

First divide $20.42 by 10 to find the cost of 1 pound/16 ounce turkey.

Dividing, this gives us 2.042.

Now, to find the cost of a 21-pound turkey, we multiply

the cost of 1 turkey by 21 to get 42.882.

So a 21-pound turkey is $42.882.

subtract- a(b-5) from b(5-a)

Answers

Answer:

5b - 5a

Step-by-step explanation:

b(5 - a) = 5b - ab

- a(b - 5) = - ab + 5a

Subtracting gives

5b - ab - (- ab + 5a) ← distribute parenthesis by - 1

= 5b - ab + ab - 5a ← collect like terms

= 5b - 5a

Sally scored 750 points on a video game.
She wants to round the number to the nearest hundred.
Which statements are true? Choose all that apply.
A.
750 is closer to 800 than to 700.
B.
750 is closer to 700 than to 800.
C.
750 is halfway between 700 and 800.
750 rounds to 700.
E.
750 rounds to 800.​

Answers

Answer:

E. 750 rounds to 800

Step-by-step explanation: first thing is to look at the tens value, numbers 1-4 get rounded down and numbers 5-9 get rounded up.

Answer:

E.  750 rounds to 800.​

Step-by-step explanation:

750 is halfway between 700 and 800, but when rounded to the nearest hundred, 750 is 800.

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Chen buys 4 tickets to a soccer game. The total cost before taxes is $80. Which equation would you use to determine the price, p, of the ticket? A 4p=80 B 80p=4 C 4+p=80 D p/4=80 Frank works in the supply room of a law firm. At the beginning of the month, he had 21 boxes of pens with 13 pens in each box. At the end of the month, there were 45 pens left. How many pens did he give out over the month? The total cost (in dollars) for a company to manufacture and sell x items per week is C = 40 x + 640 , whereas the revenue brought in by selling all x items is R = 66 x 0.2 x 2 . How many items must be sold to obtain a weekly profit of $ 200 ? what word means loyalty and devotion What is the value of x? I have a question about this. Above are two different models of the same triangular-shaped garden. If the height of the model on the left is 15 cm, what is the height of the model on the right? What is six thousandths as a number? Help idk how to do it Assume that y varies directly with x . Ify = 18when x = 6 , findywhen x = 5 . Write and solve a direct variation equation to find the answer. y = which part of the government decides whether or not laws are constitutional Which of the following is an example of a noninfectious disease? A. hepatitis B. food poisoning C.the flu D. lung cancer Imagine you are Sir John Simon. You have to write a letter to the Secretary of State for India, Lord Birkenhead, about the reception given to the Simon Commission by the Indians. Convert the decimal to a percent 0.625 PLEASE HELP!!!!! An electron jumps from one energy level to another in an atom radiating 4.5*10^-19 Joules. If Planck's constant is 6.63*10^-34Js, what is the wavelength of the radiation? (C =3*10^8) 2) use factoring to solve this x^2-4x-12=0 Monetary policy in the United States is carried out primarily by which of thefollowing agencies?Help please?! In a historical essay, how are body paragraphs different from the conclusionparagraph? ASAP 7 POINTS + LINK TO A 50 POINT QUESTIONWhich of the following will always represent a function?1: a table of pairs of numbers2: an equation in the form y = mx + b3: a list of ordered pairs4: a list of numbersLink to 50 point question: https://brainly.com/question/16753532 Suppose that two people standing 2 miles apart both see the burst from a fireworks display. After a period of time, the first person standing at point A hears the burst. Six seconds later, the second person standing at point B hears the burst. If the person at point B is due west of the person at point A and if the display is known to occur due north of the person at point A, where did the fireworks display occur? Note that sound travels at 1100 feet per second.