A cyclist cycles for x hours at 12 km/hour and y hours at 18km/hour.All together she cycles 78km in 5 hours.Find x and y 08106764242

(i) The value of x is equal to 30 and the equation has one solution and it is neither identity nor contradiction.

(ii) This equation has infinite number of solutions and it is an identity.

(iii) This equation has no solutions and it is a contradiction.

What is identity and contradiction?

An identity is an equation that can be solved using any integer that can replace the variable in the equation in a meaningful way. A conditional equation is one that is met by some numbers but not by others, such as 2x = 4. A contradiction is an equation, such as x = x + 1, that cannot be solved.

We know that,

An equation having infinitely many solutions is called an identity equation.

An equation that having no solution is called a contradiction.

(i) 6x + 4x - 6 + 24 + 9x

Combining like terms

x = 30

Therefore, The value of x is equal to 30 and the equation has one solution and it is neither identity nor contradiction.

(ii) 25 - 4x = 15 - 3x +10 - x

Combining like terms

0 = 0

It means, The equation is true for all values of x.

Therefore, This equation has infinite number of solutions and it is an identity.

(iii) 4x + 8 = 2x + 7 + 2x - 20

Combining like terms

8 = -13

It means, The equation is not true for any value of x.

Therefore,  This equation has no solutions and it is a contradiction.

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The equation of a line is y=-1/4x-7, (option 1)

A straight line's general equation is y = mx + c, where m denotes the gradient and y = c denotes the point at which the line crosses the y-axis.

Write the equation in the form y = mx + b to find the slope m and the y-intercept. This will allow you to graph the equation using the slope and y-intercept.

Given:-

Equation of the line is y=4x+8 

The point through which the line passes (-8,4).

here the slope of the line is m1=4

To find the perpendicular line we know the formula

m1*m2=-1

By putting the value of m1 we get m2= -1/4

By using the one-point formula of the line we have

=>(y-y1)=m2*(x-x1)

By putting the values of y1 and x1 we get

(y1,x1)=(-8,4)

=>(y+8)=-0.25*(x-4)

y+0.25x+7=0

Hence the desired equation of the line is y=-1/4x-7

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Answer:

5

Step-by-step explanation:

5 + 2 = 7

7(3) = 21

_

5 + 16 = 21

Answer:

Step-by-step explanation: 9091.6

Answer:

9091.6

Step-by-step explanation:

The number of gallons of gas which Mrs. Josey and her family would need is; 17.5 gallons of gas.

It follows from the task content that the quantity of gas in gallons needed by Mrs. Josey and her family to make it to Dallas is to be determined.

Therefore, since one gallon of gas is enough for 20 miles, It follows that the amount of gas required for 350 miles can be determined by proportion as follows;

20/1 = 350/x

x = 350 / 20

x = 17.5 gallons of gas.

Ultimately, the amount of gas needed for Mrs. Josey and her family to make it to Dallas is; 17.5 gallons of gas.

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Answer: The answer is 10

Step-by-step explanation:

Answer:

0

Step-by-step explanation:

if we x and y = 0

if we have 3x + 3y= 0

Answer:2

Step-by-step explanation: I don’t have a explanation

Answer: 2

Step-by-step explanation:

You should be able to do this...

In the given ΔDEF x is 17 units and y is 2 units.

A triangle is a three-sided closed-plane figure formed by joining three noncolinear points. Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.

Given, GH is the midpoint of ΔDEF and EF is the base of the ΔDEF with a length of 28 units.

We know the midpoint of ΔDEF is (1/2) EF.

∴ GH = (28/2) = 14 units.

Now GH = x - 3.

14 = x - 3.

x = 17.

Given DH and FH are equal.

∴ y + 8 = x - 7.

y + 8 = 17 - 7.

y + 8 = 10.

y = 2.

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Answer:

see explanation

Step-by-step explanation:

the median is a segment that goes from the vertex of a triangle to the midpoint of the opposite side.

Then Q is the midpoint of PR

given endpoints (x₁, y₁ ) and (x₂, y₂ ) then the midpoint M is

M = ( [tex]\frac{x_{1}+x_{2} }{2}[/tex] , [tex]\frac{y_{1}+y_{2} }{2}[/tex] ) ← midpoint formula

use this formula to find the coordinates of Q

with (x₁, y₁ ) = R (0, 2b ) and (x₂, y₂ ) = P (2a, 0 )

Q = ( [tex]\frac{0+2a}{2}[/tex] , [tex]\frac{2b+0}{2}[/tex] ) = ( [tex]\frac{2a}{2}[/tex] , [tex]\frac{2b}{2}[/tex] ) = (a, b )

---------------------------------------------------

use the distance formula to find the lengths of median MQ and hypotenuse PR of Δ MRP

d = [tex]\sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2 }[/tex]

with (x₁, y₁ ) = M (0, 0 ) and (x₂, y₂ ) = Q (a, b )

MQ = [tex]\sqrt{(a-0)^2+(b-0)^2}[/tex] = [tex]\sqrt{a^2+b^2}[/tex]

repeat with (x₁, y₁ ) = P (2a, 0 ) and (x₂, y₂ ) = R (0, 2b )

PR = [tex]\sqrt{(0-2a)^2+(2b-0)^2}[/tex]

     = [tex]\sqrt{(-2a)^2+(2b)^2}[/tex]

     = [tex]\sqrt{4a^2+4b^2}[/tex]

     = [tex]\sqrt{4(a^2+b^2)}[/tex]

     = 2[tex]\sqrt{a^2+b^2}[/tex]

then MQ is half PR

Answer:

I got (-1,-4) and (3,0) When I graphed with Desmos.  I do no see that solution.

Step-by-step explanation:

Answer:

  3 g

Step-by-step explanation:

You want to know the mass of thyme that must be added to 12 g of a spice mix that is 25% thyme in order to make it 40% thyme.

Let t represent the amount of added thyme (in grams). The amount of thyme in the augmented mix is ...

  0.25(12) + t = 0.40(12 +t)

Simplifying the equation gives ...

  3 +t = 4.8 +0.40t

  0.6t = 1.8 . . . . . . . . . subtract 0.40t +3

  t = 3 . . . . . . . . . . . divide by 0.6

3 grams of thyme must be added to the mix.

The coordinates of the vertices of the points A and B are;

A(9, 7), B(15, 9)

A point on the coordinate plane is described by a pair of points known as an ordered pair.

The coordinates of the vertices of the identical rectangles are; (3, 5), (9, 5), (9, 9)

The length of (9 5) from A is the same as the length from (9, 9) to A.

The coordinate of the point A is therefore;

x-coordinate = 9

y-coordinate = 5 + (9 - 5)/2 = 7

The coordinate of point A is (9, 7)

The length of the sides of the rectangle are;

Length = 9 - 3 = 6

Width = 9 - 7 = 2

The coordinates of the point B are;

x-coordinate = 9 + 6 = 15

y-coordinate = 9

The coordinates of the point B is (15, 9)

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Simplification of the given expression ( a + b ) / ( a - b ) for the given values of a and b is equal to ( 4 / 1 ).

As given in the question,

Given expression:

( a + b ) / ( a - b )

Simplification of the given expression ( a + b ) / ( a - b ) for the value

a = 5 and b = 3 is given by,

( a + b ) / ( a - b ) we get,

( a + b ) / ( a - b )

= ( 5 + 3 ) / ( 5 - 3)

= ( 8 ) / ( 2 )

= ( 4 × 2 ) / ( 2 )

= ( 4 / 1 )

Therefore, simplification of the given expression ( a + b ) / ( a - b ) for the given values of a and b is equal to ( 4 / 1 ).

The complete question is:

Simplify the given expression:

(a + b)/ (a -b) = ?

For a=5 and b=3

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The population variance of the given data is 3.2.

Given  Σ(x - 38)² = 64 .

We know that the population variance of the data is the square of the standard deviation.

Now the standard deviation for the population is given by

σ =√(Σ(x - 38)² / N)

Again variance = σ ²

Let us first calculate σ .

σ = √(64/20) = √3.2

variance

= σ ²

= (√3.2)²

= 3.2

Therefore the variance of the population is 3.2

In probability theory and statistics, variance is the predicted squared variation of a random variable from its population mean or sample mean. Dispersion, or how far apart from the mean a set of data are from one another, is measured by variance.

A few ideas that use variance include descriptive statistics, statistical inference, hypothesis testing, goodness of fit, and Monte Carlo sampling.

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Answer:

a = 30

Step-by-step explanation:

I am not exactly sure what the question is asking but if referring to right triangles, the Pythagorean theorem would work best.

Formula :

[tex]a^2 + b^2 = c^2\\\\[/tex]

Substitute values :

[tex]a^2 + 40^2 = 50^2\\a^2 + 1600 = 2500[/tex]

Solve for a:

[tex]a = \sqrt{2500 - 1600} \\a = 30[/tex]

** you could also use the 3:4:5 ratio

Answer: PEMDAS

Parenthesis exponents multiplication Division addition subtraction

Step-by-step explanation:

solve (x+1) first then after just follow pemdas  

Answer: .01 fluid ounces.

Step-by-step explanation:

1,000 drops is 1 FL

100 drops is .1 FL

10 drops is .01 FL

Answer:
30-2=28+542=570

Step-by-step explanation:

[tex]{ \purple{ \tt{x = 3}}}[/tex]

[tex]{ \blue{ \sf{ {6}^{2} - x - 12 = 0}}}[/tex]

[tex]{ \blue{ \sf{36 - x - 12 = 0}}}[/tex]

Take 12 as common

[tex]{ \blue{ \sf{ \cancel{12}(3 - x) { \cancel{-12} = 0}}}}[/tex]

[tex]{ \blue{ \sf{3 - x = 0}}}[/tex]

[tex]{ \red{ \boxed{ \green{ \tt \overbrace{ \underbrace{x = 3}}}}}}[/tex]

Check the picture below.

so in the parallelogram, the two triangles split by the side AC are congruents as you can see there by AAS, that means their sides and angles are congruent, that also includes the exterior angles.

since the exterior angles are also congruent, we can extend lines BC and AD as you see there in green and run an exterior angle at vertices A and C, since those two exterior angles are congruent and are also alternate interior ones, voila! it must be that BC || AD.

The expressions given in the questions mean that the least common denominator is the least common multiple.

According to the question,

We have the following information:

We have three questions of fractions which are either in addition or subtraction.

Now, we will only look at the denominators of these fractions. And note that the least common multiple is same as the least common denominator.

For first one, it is 6 and 4:

Each multiple of 6: 2*3

Multiples of 4:2*2

The least common multiple of 6 and 4: 12

The least common denominator is 12.

For second one, it is 7 and 3.

Each multiple of 7: 7

Multiple of 3: 3

The least common multiple of 7 and 3: 21

The least common denominator of 7 and 3: 21

For third one, it is 8 and 2.

Multiples of 8: 2*2*2

Multiples of 2: 2

The least common multiple of 8 and 2: 8

The least common denominator is 8.

Hence, the expressions given in the questions mean that it is the least common multiple.

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The sinusoidal equation for the graph in terms of Y, the temperature in degrees Celsius) and the time, T in hours is; Y = 3·sin((π/12)·(T + 6)) + 15

A sinusoidal equation or function is an oscillating and periodic function that is based on the sine of an angle.

The function of the graph is a sinusoidal function with the parts;

a = The amplitude

b = The frequency = 1/T

T = The period of the function

k = The vertical shift of the function

h = The horizontal shift of the function

From the graph, we have;

The minimum  point on the graph of the function = (1, 12)

The maximum point on the graph of the function = (13, 18)

The amplitude of the graph a is therefore; a = (18 - 12)÷2 = 3

The period of the graph = 1/b

1 cycle is completed in 24 hours, which indicates that the frequency of the function is; f = 2·π/24 = π/12 = b

The vertical shift, k from the parent function, y = sin(x) which is the distance the midline of the graph is raised above the x-axis is; k = 15

sin((π/12)·(0 - h)) = -1

((π/12)·(0 - h)) = -π/2

-h = 6

h = -6

The function, y = a·sin(b·(t - h)) + k, is therefore;

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Answer:

Step-by-step explanation:

l = length

w = width = 2.5

a = area = 12.5

l = a/w = 12.5/2.5 = 5

so the answer is l = 5

Answer:

Step-by-step explanation:

300 grams-24 hour= 276 so i think u just need to keep doing this till it gets to 206.4

The equation which represents the number of hours will be ln(206.4) = 1200ln(0.014).

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that a candle weighs 300 grams (g). Each hour the candle is lit, it burns 4 g of its wax. a. Leth be the number of hours the candle burns.

The equation for the number of hours will be calculated as,
[tex]h=300\times (0.014)^h[/tex]

lnh= 300 x ln(0.014)

Therefore, the equation which represents the number of hours will be ln(206.4) = 1200ln(0.014).

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The number of different codes as the letters A or C must come first and digits can be repeated is 2000

Permutations and combinations are a subset of the study of finite, discrete structures that are known as combinatorics. Combinations include the selection of items without respect to order, whereas permutations are precise selections of elements within a set where the order of the elements is significant.  

Here we have,

The locker combination code consists of one letter and 3 digits  

Here we need to find the number of different codes If the letter A or C must come first and digits can be repeated.

Given that the first letters are A and C

Here number of ways that A and C can be chosen at first = 2

As we know Number of digits = 10  [ including 0, 0 to 9 ]

Number of arrangements that can be chosen from 10 digits

= 10 × 10 ×10   [ Since repetition is allowed ]  

Therefore,

The possible number of different codes = 2 × 10 × 10 ×10 = 2000

Therefore

The number of different codes as the letters A or C must come first and digits can be repeated is 2000

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Answer:0.0013

Step-by-step explanation:

Answer: the answer is on  the calclulator

Step-by-step explanation:

The value of one-sixth times quantity x plus 24 end quantity equals negative 6 is -180.

The expression simply refers to the mathematical statements which have at least two terms which are related by an operator and contain either numbers, variables, or both. Addition, subtraction, multiplication, and division are all possible mathematical operations.

In this case, the expression given will be illustrated as:

1/6x + 24 = -6

Collect like terms

x / 6 = -6 - 24

x/6 = -30

Cross multiply

x = -30 × 6

x = -180

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A property which is used in the calculation above is: Commutative Property of Multiplication.

The Commutative Property of Multiplication states that when three (3) numbers are multiplied, the end result (output) would always be the same regardless of the way the numbers are arranged and grouped.

This ultimately implies that, re-arranging or regrouping the order of numbers that are being multiplied does not change the end result (output) or product.

Mathematically, the Commutative Property of Multiplication is represented by this mathematical expression:

a · (b) = b · (a)

By applying the Commutative Property of Multiplication to the calculation, we have:

(64⋅25)⋅4 = 6400

64⋅(25⋅4) = 6400

64⋅(100) = 6400

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The compound inequality is $176.40 ≤ t ≤ $352.80 if a construction worker earns an average bi-weekly net pay of $1,764.00 option (A) Is correct.

It is defined as the expression in mathematics in which both sides are not equal they have mathematical signs either less than or greater than known as inequality.

It is given that:

A construction worker earns an average bi-weekly net pay of $1,764.00.

= 10% of 1764

= (10/100)1764

= $176.4

= 20% of 1764

= (20/100)1764

= $352.8

Inequality will be: $176.40 ≤ t ≤ $352.80

Thus, the compound inequality is $176.40 ≤ t ≤ $352.80 if a construction worker earns an average bi-weekly net pay of $1,764.00 option (A) Is correct.

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Answer:

$382.20 ≤ t ≤ $764.40

Step-by-step explanation:

Hello, so first we would need to convert bi-weekly pay to monthly income.

First we would times $1,764.00 by 26

1764.00 × 26 = 45864

Then we would divide 45864 by 12

45864 ÷ 12 = 3822.

Then we calculate how much the worker can spend  if their monthly budget for food is in between 10% and 20%

3822 ×  10% = 382.20

3822 × 20% = 764.40

So, we can see the correct answer is $382.20 ≤ t ≤ $764.40.