i also need help w this

Answer:

You found the area of each side of the rectangular prism, subtracting the missing area from the front and back sides of the prism. Then you added together the area of all 6 faces to find the total outer surface area.

I hope this helps :)

Step-by-step explanation:

C) 0.25

Explanation

to cnovert 3/12 in decimal, we need to make the division

sorry, the math editor is not good with division

so, the answer is C

Answer:

1  3/15 - 5/15

Step-by-step explanation:

Hope this helps. PS the / sign is supposed to be for the fraction.

Step-by-step explanation:

1 1/5 - 1/3 = 0.86

Hope I helped. The only way I know how to dot this is in decimal form sorry.

The value of length of side AB is,

⇒ AB = 5 units

We have to given that;

The figure is shown a trapezoid.

Hence, By using Pythagoras theorem we get;

⇒ AB² = 4² + (5.25 - 2.25)²

⇒ AB² = 16 + 3²

⇒ AB² = 16 + 9

⇒ AB² = 25

⇒ AB = √25

⇒ AB = 5 units

Therefore, The value of length of AB is,

⇒ AB = 5 units

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The parameters that are needed to calculate a probability are listed as follows:

Then the probability is calculated as the division of the number of desired outcomes by the number of total outcomes, hence it is the same as a relative frequency.

The total number of periods is given as follows:

5 + 6 + 4 = 15.

The frequency of each class is given as follows:

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Answer:

I think it's 3x + 5 = 21 because three times a number would be 3x so that would eliminate options 2 & 4, then it says five more than three which would be adding five so that would only leave option 1 so that should be your answer

Hope this helps and may God bless you<3

Answer:

23

Step-by-step explanation:

55 = 23 + 32

14 and 41 came into my d, but 1 and 4 are 3 apart from each other

(would really appreciate the brainliest)

Basically

4.5 became 18

The scale factor is the number we multiplied 4.5 by to get 18.

We figure it out by dividing 18 by 4.5:

18 / 4.5 = 4

So, the scale factor is "4".

The answer is (4).

The scale factor of this dilation is 4.

We have,

To find the scale factor of the dilation, compare the lengths of corresponding sides in the original figure and its image.

Given:

DB = 4.5

D'B' = 18

The scale factor (k) can be determined by the ratio of the lengths of corresponding sides:

k = D'B' / DB

Substituting the given values:

k = 18 / 4.5

Simplifying the expression:

k = 4

Therefore,

The scale factor of this dilation is 4.

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The complete question:

"What is the scale factor of the dilation with center (0,0) if the image of segment DB is segment D'B', where DB has a length of 4.5 units and D'B' has a length of 18 units?"

a. The PDF for battery life when the primary use is talk time is f(x) = 0.05e^(-0.05x)

b. The probability that the battery charge will last no more than 15 hours when the primary use is talk time is 0.393

c. The probability that the battery charge will last more than 20 hours when the primary use is talk time is 0.4493

d. The probability that the battery charge will last no more than 5 hours when the primary use is Internet applications is 0.3935

a. The probability density function (PDF) for battery life when the primary use is talk time can be modeled using the exponential distribution, given by

f(x) = λe^(-λx)

where λ is the rate parameter, which can be calculated as the reciprocal of the mean battery life. Since the mean battery life is 20 hours, λ = 1/20 = 0.05. Therefore, the PDF for talk time battery life is

f(x) = 0.05e^(-0.05x)

b. To find the probability that the battery charge will last no more than 15 hours when its primary use is talk time, we need to calculate the cumulative distribution function (CDF) and evaluate it at x = 15

F(x) = ∫[0,x] f(t) dt

F(15) = ∫[0,15] 0.05e^(-0.05t) dt ≈ 0.393

Therefore, the probability that the battery charge will last no more than 15 hours when its primary use is talk time is 0.393, or 39.3%.

c. To find the probability that the battery charge will last more than 20 hours when its primary use is talk time, we need to subtract the probability that it will last no more than 20 hours from 1

P(X > 20) = 1 - P(X ≤ 20) = 1 - F(20)

where F(x) is the CDF of the battery life distribution. From part b, we know that F(15) ≈ 0.393, so we can use this value to calculate F(20)

F(20) = ∫[0,20] 0.05e^(-0.05t) dt ≈ 0.5507

Therefore, P(X > 20) ≈ 1 - 0.5507 ≈ 0.4493, or 44.9%.

d. The PDF for battery life when the phone is primarily used for Internet applications can also be modeled using the exponential distribution. From the problem statement, we know that the mean battery life for this use is 7 hours, so the rate parameter is λ = 1/7 = 0.1429. Therefore, the PDF for Internet use battery life is

f(x) = 0.1429e^(-0.1429x)

To find the probability that the battery charge will last no more than 5 hours when its primary use is Internet applications, we can calculate the CDF

F(x) = ∫[0,x] f(t) dt

F(5) = ∫[0,5] 0.1429e^(-0.1429t) dt ≈ 0.3935

Therefore, the probability that the battery charge will last no more than 5 hours when its primary use is Internet applications is 0.3935

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previous cost: $36

new cost: $24

percent change = 100*(new cost - previous cost)/previous cost = 100*(24 - 36)/36 = -33.3%

That is, the new cost is 33,3% less than the previous one.

Answer:

Step-by-step explanation:

To write y as a function of x using the given functions, we can substitute the value of "a" in the first equation with the expression "-5x + 1" from the second equation.

Given:

y = -3a + 3

a = -5x + 1

Substituting the value of "a" in the first equation:

y = -3(-5x + 1) + 3

Now, let's simplify this expression:

y = 15x - 3 + 3

y = 15x

Therefore, y can be expressed as a function of x as:

y = 15x

Answer:

830.53 in²

Step-by-step explanation:

Find the area of the full circle and divide it by 2:Use the circle area formula, A = r²Plug in 3.14 as pi, and plug in the radius:A = r²A = 3.14(23²)A = 1661.06Divide this by 2:1661.06 / 2= 830.53So, the area of one semicircle is 830.53 in²

Answer: The area of one semicircle is approximately 830.53 square inches.

Step-by-step explanation:

The area of a circle is given by the formula:

A = πr²

where A is the area of the circle and r is its radius.

The radius of the circle cut out of the piece of wood is about 23 inches. Therefore, its area is:

A = πr²

A = π(23)²

A = π(529)

A ≈ 1661.06 square inches

The carpenter cuts the circle into two semicircles. Therefore, the area of one semicircle is:

A/2 ≈ 830.53 square inches

Therefore, the area of one semicircle is approximately 830.53 square inches.

I hope this helps! Let me know if you have any other questions.

Question:

Identify the like terms in the algebraic expression

\(\frac{2x}{5} -5.2y +2.2 + \frac{x}{3}\)

Answer:

The like terms in the given expression are \(\frac{2x}{5}\) and \(\frac{x}{3}\)

Step-by-step explanation:

Given:

\(\frac{2x}{5} -5.2y +2.2 + \frac{x}{3}\)

Required:

Identify the like terms

To solve this, we need to understand what like term is all about.

Like term simply refer to terms or entities that have the same variable and exponents (power)

From the expression above, there are two variables;

x and y.

To get the like terms of x and/or y;

we simply look for another occurrence of x and/or y in the expression; and this occurrence must have the same exponent as x and/or y.

For x

\(\frac{2x}{5}\) and \(\frac{x}{3}\) have the same variable and exponent; Hence, they are like terms

There's only one occurrence of variable y;

Conclusively, the like terms in the given expression are \(\frac{2x}{5}\) and \(\frac{x}{3}\)

2x/5 and -5.2y

hope this helps

Answer:

trigonometric function whose value for the complement of an angle is equal to the value of a given trigonometric function of the angle itself the sine is the cofunction of the cosine.

Answer:

Equation: (14.71-4.48) [divided by] 3 =x

"Answer x": 3.41

Explanation:

14.71-4.48=10.23

10.23/3 = 3.41

3.41

Answer: x = \(\frac{-31}{23}\), y = \(\frac{-9}{23}\), z = \(\frac{-83}{23}\)

Step-by-step explanation :Solving system of equations

Given the following system of equation below

 - 4x + 2y + z =1 .......(1)

x − y + 3x =  −5 ........(2)

3x + y − 4z = 10.........(3)

first we solve eq 1 and eq 3:

we get, -13x + 9y = 14 ..........(4)

Now we solve eq 2 and eq 4 and get value of x and y:

we get,  x = \(\frac{-31}{23}\) and y = \(\frac{-9}{23}\)

finally we put value of x and y in eq 1 and get the value of z:

-4(-31/23) + 2(-9/23) + z = 1

106/23 + z = 1

z = 1 - 106/23

z =\(\frac{-83}{23}\)

Hence the solution of equation is (\(\frac{-31}{23}\), \(\frac{-9}{23}\), \(\frac{-83}{23}\))

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\(\frac{1}{2}\) Or 2.

(Pretty sure it's the first option.)

Brainiest if correct? Ty!

The perimeter of the Triangle = 20.9 cm  , and the Area of the triangle = 16 cm² .

In the question ,

To find the perimeter we first need the length of all the three sides ,

the distance between two points X(a,b) and Y(c,d) is calculated using the formula XY = √(c-a)²+(d-b)²

given the points A(0,9) , B(4,9) and C(0,1)

length AB = √(4-0)²+(9-9)² = √16 = 4 cm

length BC = √(0-4)²+(1-9)² = √16+64 = √80 = 4√5 cm

length AC = √(0-0)²+(1-9)² = √64 = 8 cm

The perimeter of ΔABC = AB + BC + AC

= 4+4√5+8

= 12+4√5

= 20.9 cm

The Area of ΔABC = (1/2)*AB*AC

Substituting the values of AB and AC we get

= (1/2)*4*8

= 2*8

= 16 cm²

Therefore , the perimeter of the Triangle = 20.9 cm  , and the Area of the triangle = 16 cm² .

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The word for added and subtracted parts of an expression is known as the term.

An expression in math is an arithmetic set of numbers and variables with signs and calculations. For example, 4x - 2x = 2x is an expression. The parts that are connected with addition or subtraction or other signs are called terms.

Terms that have the same base exponent can be joined with addition and subtraction. These are called like terms. For example, 3 x 3 and 5 x 3 are like terms.

Therefore, the term is the term for the added and removed components of an equation.

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Answer: 3/20

Step-by-step explanation: (1/7) :(20/21) = (1/7 )· 21/20 = 21/(7·20)= 3/20

Answer:

Imma write it in the explanation

Step-by-step explanation:

6. interior angles, alternate angles

for c to be parallel with d, we need 2 and 7 to be interior angles (a+b=180°, u/c shaped), and 3 and 5 to be alternate angles (a=b, z shaped).

7. 1+3=180°, 2+4=180°

there were 2 parallel lines in a trapezium, so for the c shape on 1 and 3 they add up to 180°, and same thing to 2 and 4.

Work Shown:

C = pi*diameter

C = (22/7)*(10)

C = 31.42857

C = 31 inches approximately

The result is approximate because I rounded to the nearest whole number, and also because pi = 22/7 is approximate.

Answer:

The answer is 7:10 clock

The method is: Find the increase and find the ratio of the increase and the old price.

The percentage increase is 20%

A percentage is defined as the ratio that can be expressed as a fraction of 100.

The method below shows how you would calculate the % increase.

First step: Find the increase:

increase = 480 - 400 = $80

Second step: Find the ratio of the increase and the old price and multiply by 100 to express in percentage:

80/400 * 100 = 20%

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The required ratio of the lengths EF and AD is 2:1 for the given circle.

Given that a circle A with points B, C, D, E, F, and I on its circumference.

A chord of the circle is a line that connects any two locations on the circumference of any circle. The circle chords are BC, EF, and HI in this case.

The radius of the circle is defined as the line connecting center A with any point on the circle's perimeter. AD indicates the radius of the circle.

The diameter of the circle is any chord that passes through the center of the circle. The diameters of the circle are represented by EF and HI.

A diameter is usually twice as long as a radius.

As a result, the diameter-to-radius ratio will be 2:1.

Therefore, the required ratio of the lengths EF and AD is 2:1

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The missing figure has been attached below.

Answer: B  :)

Step-by-step explanation:

you need to find the number of containers for all the juice so add all of them together and then divide by 1.4 or the volume of the containers to get to amount you need

Answer: (20)=2(1)+18 or (54)=2(18)+18