Just number 12 will mark brainly

Answer:

m ∠ABD = 140°

m ∠DBC = 40°

Step-by-step explanation:

∠ (15x - 4) + ∠(5x - 8) = 180°

15x - 4 + 5x - 8 = 180

20x -1 2 = 180

20x = 180 + 12

x = 9.6

m ∠ABD = 15x - 4 = 140°

m ∠DBC = 5x - 8 = 40°

Answer:

Step-by-step explanation:

TYSM

HAVE A GREAT DAY

Answer:

Step-by-step explanation:

DRINK WATER! EAT SAY HEALTHY!!!!! <3

To find the dimensions of the rectangle with the maximum area, we can start by visualizing the problem. The base of the rectangle lies on the x-axis, and two of its vertices are on the parabola y = 25 - x^2.

Let's denote the width of the rectangle as 2x (since it is symmetric about the y-axis) and the height as y.

(a) The first step is to express the area of the rectangle in terms of x and y. The area of a rectangle is given by the formula A = width * height, so in this case, the area is A = 2x * y = 2xy.

(b) Next, we need to express y in terms of x. Since the vertices of the rectangle lie on the parabola y = 25 - x^2, we substitute y with 25 - x^2 in the area equation, giving us A = 2x(25 - x^2).

(c) To find the dimensions that maximize the area, we need to maximize the area function. Taking the derivative of A with respect to x and setting it equal to zero, we have dA/dx = 0:

dA/dx = 2(25 - x^2) - 6x^2 = 0

Simplifying the equation, we get:

-8x^2 + 50 = 0

Solving for x^2, we find:

x^2 = 50/8 = 6.25

Taking the square root of both sides, we have:

x = ±2.5

Since the width of the rectangle cannot be negative, we take x = 2.5.

(d) Now, substituting this value of x into the equation for y, we have:

y = 25 - (2.5)^2 = 18.75

Therefore, the dimensions of the rectangle with the maximum area are a width of 5 units and a height of 18.75 units.

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Answer: Area of Prism = 312 in²

Step-by-step explanation:

Formula for triangular prism:

Surface Area = Ph + 2B

P = perimeter of Base(triangle)

For perimeter we need to find what the length of that leg of base is.

Use pythagorean

c² = a² + b²

10² = 8² +b²

100  = 64 + b²

100 - 64 = b²

b² = 36

b = 6

P =  6 +`10 + 8

P = 24

h = height of the prism = 11

B = Area of the base, triangle

B = 1/2 b h           >this height is just for triangle not prism

B = 1/2 (8)(6)

B = 24

Area of Prism = Ph + 2B

Area of Prism = (24)(11) +2(24)

Area of Prism = 264 + 48

Area of Prism = 312 in²

Answer:

1: 6:10,9:15,12:20 2: 4:8, 6:12, and 8:16

Step-by-step explanation: To make an equivalent ratio you multiply each number by the same number (ex: 2:4 2*2= 4 and 4*2=8 so 2:8)

Answer:

Step-by-step explanation:

               Salt-Water

Class A         3/5=y/x      y=3/5x

Class B         2/4=y/x     1/2=y/x      y=1/2 x

Answer:

A

Step-by-step explanation:

The number of  distinguishable code symbols can be formed with the letters for the words philosophical and mathematics is 24

Permutation is a mathematical technique that determines the number of possible arrangements in a set when the order of the arrangements matters.

In the word philosophical , There are 13 letters

2ps, 2is, 2Os, 2Hs and in Mathematics, there are = 11 letters

2ms, 2ts, 2As,

Therefore the number of permutations is 2!212!2! and 2!2!2!

This imples 16 + 8

Therefore, the number of distinguishable code symbols can be formed with the letters for the words philosophical and mathematics = 24

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Answer:

6 miles

Step-by-step explanation:

Li can walk 6 miles if you divide 135 and 45 you'll get 3 finally if you multiply 2 and 3 you'll get 6 So in total Li walks 6 miles

Answer:

very cute

Step-by-step explanation:

Ian even know him until now but he mad fine

Answer:

2+5 = 7 is the related addition sentence that shows the commutative property of addition because it has fsdagsfdfgsfsdgfadbadfgathe same result of addition as 5+2=7.

Commutative property of addition says that if we have two numbers we have interchange them and this doesnot affect the result....

Step-by-step explanation:

Answer:

It's the last one, 2.5

Step-by-step explanation:

The integers greater than 999 but not greater than 4000 is 375.

Integers are the collection of whole numbers and negative numbers. Similar to whole numbers, integers also does not include the fractional part. Thus, we can say, integers are numbers that can be positive, negative or zero, but cannot be a fraction. We can perform all the arithmetic operations, like addition, subtraction, multiplication and division, on integers. The examples of integers are, 1, 2, 5,8, -9, -12, etc. The symbol of integers is “Z“.

The smallest number in the series is 1000, a4-digit number.

The largest number in the series is 4000, a4-digit number

The left most digits (thousands place) of each of the 4 digit numbers other than 4000 can take one of the 3 values 1 or 2 or 3.

The next 3 digits (hundreds, tens and units place) can take any of the 5 values 0 or 1 or 2 or 3 or 4.

Hence, there are 3×5×5×5 or 375 numbers from 1000 to 3999.

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Answer:

42c

Step-by-step explanation:

Answer:

143

Step-by-step explanation:

Your equation to find x is:

140+146/2 = 143

T A can be seen as a linear transformation from R^2 to R^3.

To find the range and codomain of the matrix transformation T A, we need to first determine the matrix T A . The matrix T A is obtained by multiplying the input vector x by A:

T A (x) = A x

Therefore, T A can be seen as a linear transformation from R^2 to R^3.

To determine the range of T A , we need to find all possible outputs of T A (x) for all possible inputs x. Since T A is a linear transformation, its range is simply the span of the columns of A. Therefore, we can find the range by computing the reduced row echelon form of A and finding the pivot columns:

A =  (\left[\begin{array}{cc}1 & 2 \ 1 & -2 \ 0 & 1\end{array}\right]) ~ (\left[\begin{array}{cc}1 & 0 \ 0 & 1 \ 0 & 0\end{array}\right])

The pivot columns are the first two columns of the identity matrix, so the range of T A is spanned by the first two columns of A. Therefore, the range of T A is the plane in R^3 spanned by the vectors [1, 1, 0] and [2, -2, 1].

To find the codomain of T A , we need to determine the dimension of the space that T A maps to. Since T A is a linear transformation from R^2 to R^3, its codomain is R^3.

If the functions were not linear, it would not make sense to talk about their range or codomain in this way. The concepts of range and codomain are meaningful only for linear transformations.

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Answer: \(2.25\sqrt{3}\)

Not sure what you mean by terms of pi, unless you want us to find the area of the sector, not the triangle.

Step-by-step explanation:

Assuming you mean the area of the triangle...

First draw an altitude from the 120 degree angle to the opposite base.  You will find that the altitude will also be a median.  This forms 2 30-60-90 right triangles.  Thus, the height of the altitude is 1.5 and the base of the triangle is 1.5*root3.  Thus, the base of the triangle is \(3\sqrt{3}\) and the height is 1.5.  Thus, the area of the triangle is \(2.25\sqrt{3}\)

Answer:

c

Step-by-step explanation:

gm=cm+rg

gm-cm=rg

m(g-c)/g-c = rg/g-c

m=r g/g-c

     -3m=4m-15

-3m-4m=-15

-7m=-15

-15/-7m

= -2.14

-15/-3-4= 2.14

Answer:

The answer is C. I just got it right

Step-by-step explanation:

Answer:

30

Step-by-step explanation:

you plug in k with 3 and j with 5

4 times 3 + 6(5 – 2) = 30

The formula you have given (SS₁ + SS₂) / (n₁+ n₂) is actually the formula for the unweighted average of the variances, which is not appropriate when the sample sizes and variances are different between the two samples.

The formula for pooled variance is:

pooled variance = (SS₁+ SS₂) / (df₁ + df₂)

where SS₁ and SS₂ are the sum of squares for the two samples, df₁ and df₂ are the corresponding degrees of freedom, and the pooled variance is the weighted average of the variances of the two samples, where the weights are proportional to their degrees of freedom.

Note that the denominator is df₁ + df₂ not n₁+ n₂. The degrees of freedom take into account the sample sizes as well as the number of parameters estimated in

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The triangle ABC, triangle FDE, and triangle GIH are congruent with each other.

Three sides and three internal angles define a triangle, a basic shape. The symbol is used to represent one of the geometric shapes in which the three corners are connected to one another. Triangles are categorized according to their sides into numerous different forms.

As per the given data in the question,

Sides AB = DF, AB = GI, BC = HI, and DE = HI are equal to each other.

Also, the angles, m∠B = m∠D = m∠I are equal.

Then by the property of the side angle side all the triangles are congruent with each other.

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Answer:

A.  ΔABC, ΔFDE, and ΔGIH

Answer:

= 6.25 hours.

Step-by-step explanation:

If 5 hours = 12 loaves of bread

than ? = 15 loaves of bread.

therefore 15/12 × 5 hours

= 75/12

= 6. 25 hours.

Answer:

14

Step-by-step explanation:

k

=

c

−

b

2

4

a

We know that

a

=

1

,

b

=

−

8

and

c

=

2

, so let's substitute:

k

=

2

−

(

−

8

)

2

4

(

1

)

=

2

−

64

4

=

2

−

16

=

−

14

.

So, we have

min

=

−

14

. Let's check:

graph{(x^2 - 8x + 2 - y)(-14 -y)=0 [-11.82, 20.22, -15.38, 0.64]}

Answer:

y - y = m(x - x)

y + 6 = 2(x + 1)

y + 6 = 2x + 2

y = 2x -4

Answer:

Step-by-step explanation:

100 sq cm

It's 4. why? well because you must take 6 7 8 9 and all the other numbers and add/division

Answer:

$0.75

Step-by-step explanation:

the total was 6 dollars, and there were 8 lemons. so 6/8 = 3/4 = 0.75

hope this helps!! :)

Answer:

.75 cents each

Step-by-step explanation:

if you divided the 6 dollars by the 8 lemons then you get 0.75

The present ages of the man and his son are 60 years and 25 years, respectively.

Let's assume the present age of the son is x years. According to the given information, five years ago, the man was thrice as old as his son, so the man's age at that time was 3(x - 5) years.

Now, let's consider the future scenario. In 10 years, the man's age will be (3(x - 5) + 10) years, and the son's age will be (x + 10) years.

According to the second given information, the man will be twice as old as his son in 10 years, so we can write the equation:

3(x - 5) + 10 = 2(x + 10)

Simplifying the equation:

3x - 15 + 10 = 2x + 20

3x - 5 = 2x + 20

3x - 2x = 20 + 5

x = 25

Therefore, the present age of the son is 25 years. Substituting this value into the equation for the man's age five years ago:

Man's present age = 3(x - 5) = 3(25 - 5) = 3(20) = 60 years

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In order to have an average speed of 6 miles per hour over the entirety of the trip, the man would need to travel 15 miles in the next 2 1/2 hours. This means that he would need to travel at a speed of 6 miles per hour for the remainder of the trip.

Answer:

pizza, or sandwiches

Step-by-step explanation:

Answer:

Try a deli people love those

Step-by-step explanation:

Hope u do good!