12. The perimeter of a triangle with sides 5x-1, 5x-1, 2.2x +10, and the perimeter of a square with a side length of 6.5x -11.8 are the same. What is the value of x?​

Check the picture below.

[tex]\textit{internal division of a line segment using ratios} \\\\\\ S(-6,-5)\qquad R(-11,10)\qquad \qquad \stackrel{\textit{ratio from S to R}}{2:3} \\\\\\ \cfrac{S\underline{T}}{\underline{T} R} = \cfrac{2}{3}\implies \cfrac{S}{R} = \cfrac{2}{3}\implies 3S=2R\implies 3(-6,-5)=2(-11,10)[/tex]

[tex](\stackrel{x}{-18}~~,~~ \stackrel{y}{-15})=(\stackrel{x}{-22}~~,~~ \stackrel{y}{20}) \implies T=\underset{\textit{sum of the ratios}}{\left( \cfrac{\stackrel{\textit{sum of x's}}{-18 -22}}{2+3}~~,~~\cfrac{\stackrel{\textit{sum of y's}}{-15 +20}}{2+3} \right)} \\\\\\ T=\left( \cfrac{ -40 }{ 5 }~~,~~\cfrac{ 5}{ 5 } \right)\implies {\Large \begin{array}{llll} T=(-8~~,~~1) \end{array}}[/tex]

Answer:

225

Step-by-step explanation:

if it is 1/3 off, then it means it's at 2/3 the price. now, you have to divide 450/2 to get the answer. 2/3 divided by 2=1/3

450/2=225, and thats how much money you will save

From the question, we are asked to find the area.

Since all the sides of the figure are the same, then it is a square.

So we will be using the area of a square formula to solve it.

Formula for area of a square is:

Area = a x a = a²

a = 5 in

So,

Area = 5 x 5 = 5² = 25

Therefore, the area of the square is 25 in²

Answer: 8/7 is your answer

Step-by-step explanation:

Answer:

Exact Form:

8/7

Decimal Form:

1.42857

Mixed Number Form:

1 1/7

glad i could hep

Step-by-step explanation:

Convert the mixed numbers to improper fractions, then find the LCD and combine.

Answer:

Step-by-step explanation:

2/3 ÷ 4/9 What is the answer?

2/3 : 4/9 =

2/3 * 9/4 =

3/2

The value of a, b, c and d are 25, 3, 14 and 7 such that the sum of all rows, columns and diagonals are 48.

Given to us a magic square in which the sum of all rows, columns and diagonals are same. Then, we have to complete the missing numbers i.e., a, b, c and d respectively.

Let's proceed to solve this magic square accordingly.

First let's calculate that what will be the sum of all rows, columns and diagonals.

From the figure of magic square one diagonal is completely filled from that we can easily calculate the sum of the diagonals.

Sum = 5+16+27 = 48

Then, we can find the value of a, b, c and d easily.

5+a+18 = 48

23+a = 48

a = 48-23

a = 25

Therefore, the value of a is 25.

29+16+b = 48

45+b = 48

b = 48-45

b = 3

Therefore, the value of b is 3.

Now, 5+29+c = 48

34+b = 48

c = 48-34

c = 14

Therefore, the value of c is 14.

Then, we have

c+d+27 = 48

14+d+27 = 48

41+d = 48

d = 48-41

d = 7

Therefore, the value of d is 7.

Hence, we have completed the magic square in which the sum of all rows, columns and diagonals are 48.

Therefore, the value of a, b, c and d are 25, 3, 14 and 7 respectively.

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He can buy $100  of gasoline that you can buy if you also get a car wash and can spend at most $30.

An inequality in mathematics is a relation that compares two numbers or other mathematical expressions in an unequal way. The majority of the time, size comparisons between two numbers on the number line are made. Different types of inequalities are represented by a variety of notations, including:

The symbol a b indicates that an is smaller than b.

When a > b is used, it indicates that an is bigger than b.

Given Data

The gas station charges $0.20 less per gallon of gasoline if a customer also gets a car wash. A car wash cost $10.

Inequality-

$0.2x + $10 = $30

0.2x = $20

x = 100

He can buy $100  of gasoline that you can buy if you also get a car wash and can spend at most $30.

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From trigonometric ratios we calculate the value of the cos C is 4/9 and the value of cosec C is 9/√65 .

Real functions known as trigonometric functions in mathematics connect right-angled triangle angles and the ratios of their two side lengths.

We know that sec C = 1/cos C

Hence the value of cos C = 4/9 .

Again we know that the value of sin C=1/cosec c

Therefore the value of cosec C is 9/√65 .

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Answer:

1. Correct

2. Incorrect

3. Correct

4. Correct

5. Incorrect

Step-by-step explanation:

For the ones you got wrong:

1 / (-3)² = 1/9

and

[tex]3^{-2}[/tex] = 1/9

Answer:

First one is correct

Second one is 1/9

Third one is -1/9

Fourth one is 1/9

Fifth one is 1/9

Step-by-step explanation:

Second one -

Fifth one - calculate 3 to the power of -2 to get

1/9

Answer:

[tex]x=-7i, 7i, 5/8, -5/8[/tex]

Step-by-step explanation:

[tex](64x^2-25)(x^2+49)=0 \\ \\ (8x-5)(8x+5)(x+7i)(x-7i)=0 \\ \\ x=-7i, 7i, 5/8, -5/8[/tex]

The given system of equations represented as a matrix is

[tex]\left[\begin{array}{ccc}2&3&5\\-1&0&4\\-6&-1&1\end{array}\right] \left[\begin{array}{c}x\\y\\z\end{array}\right] = \left[\begin{array}{c}9\\10\\12\end{array}\right][/tex]

From the question, we are to represent the given system of linear equations with a matrix.

The given system of equations is

2x + 3y + 5z = 9

-x + 4z = 10

-6x + z -12 = y

First, we will write the third equation in standard form

-6x + z -12 = y

This becomes

-6x - y + z = 12

Thus,

The system of equations becomes

2x + 3y + 5z = 9

-x + 4z = 10

-6x - y + z = 12

Thus,

The system of equations can be written as a matrix as shown below

[tex]\left[\begin{array}{ccc}2&3&5\\-1&0&4\\-6&-1&1\end{array}\right] \left[\begin{array}{c}x\\y\\z\end{array}\right] = \left[\begin{array}{c}9\\10\\12\end{array}\right][/tex]

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Answer:negative slope, slope=-3/5

Step-by-step explanation:
To find slope:

Rise/Run

Rise/Run: down 3 left 5 so -3/5

Check the picture below.

The true statement about the result is that D. The survey suffers from voluntary response bias and may not estimate true support for the extended hours

From the information, in order to measure support for extended hours, the citizen visits neighborhood homes and asks adults the research question.

This illustrates bias as the citizen wants to propose to the city council extending the hours at the local public library on some weekdays.

Therefore, the true support may not be illustrated. In conclusion, the correct option is D.

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Yes they are vertical angles, the angles are nonadjacent and are formed by intersecting lines.

When two lines that are straight intersect with each other, they form two pairs of opposite angles that are called vertical angles.

Vertical angles share a common vertex both no common sides and are therefore referred to as non-adjacent angles.

Thus, the image shows that lines intersect to form angle 4 and angle 7.

Angle 4 and angle 7 share a common vertex but do not share a common side, hence they are nonadjacent to each other, as shown in the diagram.

We can conclude that they are vertical angles because they are nonadjacent and are formed by intersecting lines.

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Answer:x=10

Step-by-step explanation:

1. Simplify both sides of the equation. -3(x+4)=-6x+18 to -3x - 12=-6x + 18

2. Add 6x to both sides. -3x - 12=-6x + 18 to -3x - 12 + 6x=-6x + 18 +6x which would equal to 3x - 12=18

3. Add 12 to both sides. 3x - 12 + 12=18 + 12.

4. Divide both sides by 3. 3x/3=30/3 which equals x=10.

Answer:

315 over 1700

1700 long division enclose 315

315 ÷ 1700

Step-by-step explanation:

315 divided by 1700 can be written in each of the three ways listed above.

Answer:

Step-by-step explanation:

If the sum of three consecutive odd number is 81, find the numbers.​

(81 - 6) : 3 = 25

25 + 2 = 27

27 + 2 = 29

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

check

25+27+29=81

the answer is good

Answer: 25.1º

Explanation

As the given triangle is a right triangle, we can use trigonometric functions to find DF, specifically:

where the adjacent is the side adjacent to our angle and the hypotenuse is the longest side (side opposite to the 90º angle).

Based on this, we can replace the values as follows:

Solving for DF:

Answer:

ab^4/b-a^2

Step-by-step explanation:

...........

The option that best describes the elevation of Desert Shores is; A. Desert Shores is lower than 55 meters below sea level.

We are told that the elevation of Desert Shores, California, is less than -55 meters.

Now, an elevation of a natural landmass like this is usually given with reference to the sea level. If above sea level, it is positive but if below sea level, it is negative.

Now, the elevation is negative as we can see that it is given as -55 meters. Thus, we can easily conclude that Desert Shores is lower than 55 meters below sea level.

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Answer:

Answer bellow with explanations

Step-by-step explanation:

if Miriam buys 0.5 pounds of strawberries and 3 pounds of apples she will in total would have bought 3.5 pounds of fruit.

if you are looking for the price she had to pay for the fruits above the equation to solve that is as following.

0.5 x 3$ = 1.5$

3.0 x 3.25 = 9.75$

total for the fruits needed above would be 1.5$ + 9.75$ = 11.25$

if you are looking for the amount of pounds converted into the amount of fruit

0.5/3$ = 0.16(6) pounds of strawberries

3/3.25$= 0.92307692307 pounds of apples

total of pounds of fruit that have been purchased is equal to 0.16(6) + 0.92307692307 = 1.08974358973 pounds

If Miriam buys x pounds of strawberries and y pounds of apples

it can be shown in an equation using 2 unknown values

X(strawberries)

Y(apples)

x/3$ + y/3.25$

to calculate the amount of pounds that have been purchased

The slope of the line is indefinite (∞). Also, the line will be parallel to the x-axis.

It is given in the question that a line passes through the points (7, 10) and (7, 20).

We have to find the slope of the line.

We know that,

Slope of a line with coordinates (a,b)  and (c,d) is given by:-

(d - b)/( c - a)

Here,

a = 7,

b = 10,

c = 7 and,

d = 20

Hence, we can write,

Slope of the line = (20 - 10)/( 7 - 7) = 10/0 = ∞.

Hence, the slope of the line is indefinite.

Here, as the x -coordinate of both the points are same, this line will be parallel to the x - axis.

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Cost of the ad is $167.5

What is cost?

A cost is the worth of money that has been used up to create something or supply a service and is thus no longer accessible for use in production, research, retail, or accounting. In business, the cost might be one of acquisition, in which case the money spent to obtain it is recognized as cost. In this situation, money is the input that is used to purchase the item. This acquisition cost might be the total of the original producer's production expenses and the acquirer's additional transaction costs over and above the amount paid to the producer. Typically, the price includes a profit margin above the cost of manufacture.

The cost of the ad per column inch = $67

So, the cost of 2¹/₂ inch = 67 x 2¹/₂ = $167.5

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From the calculations, we could obtain the maximum speed of the car as 72.6 miles/hr.

The term proportionality gives us an idea of the nature of the relationship that does exist between the variables in a given situation. The proportionality could be;

1) Direct

2) Inverse

3) Joint

Given that  the stopping distance (D) varies directly as the speed (S), we could say;

D α S

Introducing the constant k

D = kS

k = D/S

k = 0.027 miles/40 mile/hr

k = 6.75 * 10^-4 hours

Maximum speed = D/k

= 0.049 miles/ 6.75 * 10^-4 hours

= 72.6 miles/hr

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Answer: Zero Product Property

Step-by-step explanation:

Answer:

Well, am not sure if am correct, if a = 0 and if b = 0, then both terms have the same value. The law this equation ab = 0 is following is called Zero Product Property.

Step-by-step explanation:

a x b

Suppose a x b = 0

Then either a = 0 or b = 0

so these are the two possible cases.

1. 0 x b = 0

2. a x 0 = 0

Therefore, the product of the a and b is equal to zero when a is equal to zero or b is equal to zero. This rule is the zero product property.

Answer:

line I is parallel toM to know how you got follow me and ask the the question

Explanation:

Erase line L since we won't be using it. Erase every angle but angle 5 and angle 6.

If angle 5 and angle 6 are congruent, then we can use the converse of the corresponding angles postulate to show that lines p and q are parallel.

Angle 5 and angle 6 are corresponding angles since they are both in the same northeast corner, i.e. they're both in the same corresponding position so to speak.

Answer:

3/5 is the smallest, 7/9 is in the middle and 5/6 is the biggest

Step-by-step explanation:

Brainlest, Please!

Answer: 3/5 is first, 7/9 is second, and 5/6 is last.