Help me plz show work

Answer:

The perimeter of rectangle is [tex]18\ cm[/tex]

Step-by-step explanation:

Let

x-----> the length of the rectangle

y----> the width of the rectangle

we know that

[tex]x=y+5[/tex] ----> equation A

[tex]120=xy+2x^{2}+2y^{2}[/tex] ---> equation B (area of the constructed figure)

substitute the equation A in equation B

[tex]120=(y+5)y+2(y+5)^{2}+2y^{2}[/tex]

[tex]120=(y+5)y+2(y+5)^{2}+2y^{2}\\ 120=y^{2}+5y+2(y^{2}+10y+25)+2y^{2}\\ 120=y^{2}+5y+2y^{2}+20y+50+2y^{2}\\120=5y^{2}+25y+50\\5y^{2}+25y-70=0[/tex]

using a graphing calculator -----> solve the quadratic equation

The solution is

[tex]y=2\ cm[/tex]

Find the value of x

[tex]x=y+5 ----> x=2+5=7\ cm[/tex]

Find the perimeter of rectangle

[tex]P=2(x+y)=2(7+2)=18\ cm[/tex]

Answer:

65.5 m

Step-by-step explanation:

Step 1. Find the width of the rectangle.

The formula for the area of a rectangle is

A = lw

Data:

A = 265.5 m²

l =     18    m

Calculation:

265.5 = 18w

w = 265.5/18 = 14.75 m

Step 2. Calculate the perimeter

The perimeter (P) of a rectangle is the sum of the lengths of its sides.

P = 2(l + w) = 2(18 + 14.75) = 2 × 32.75 = 65.5 m

The perimeter of the rectangle is 65.5 m.

Answer:

1.0

Step-by-step explanation:

the 9 would round up because the number to its right is 5 or more but since 9 rounds to 10, the one would carry over to the ones place

Place value can be defined as the value of a digit in a given number. Examples of place value are : Ten Thousand, Thousands, Hundreds, Tens, Ones, Tenth, Hundredth, Thousandth, Ten Thousandth e.t.c

0.955 rounded to the nearest tenth of an inch is 1.0.

Rounding up 0.955 to the nearest tenth:

Therefore, 0.955 rounded to the nearest tenth of an inch is 1.0.

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Answer:

8 oz bottle

Step-by-step explanation:

1.36/8 = .17

3.20/16 = .20

Answer:

Product A

Step-by-step explanation:

You're going to use the sell price divided by bottle size.

Product A, $1.36/8, $0.17  per oz.

Product B, $3.2/16, $0.2 per oz.

therefore A is cheaper

Answer:

8 more glasses

Step-by-step explanation:

12-4=8

Final answer:

After serving 4 glasses of the original 12 glasses of lemonade, Jasmine can serve 8 more glasses. We calculate this by subtracting the number of glasses already served from the total number of glasses the pitcher contains.

Explanation:

Jasmine made a pitcher of lemonade that contains 12 glasses. After she serves 4 glasses of lemonade, we can calculate how many more glasses, g, she can serve by subtracting the number of glasses served from the total number of glasses that the pitcher initially had. The equation then becomes: 12 glasses - 4 glasses = g.

To find the value of g, we subtract 4 from 12, which gives us:

g = 12 - 4 = 8

Therefore, Jasmine can serve 8 more glasses of lemonade from the pitcher.

[tex] \sin(60°) = \frac{x}{14} \Leftrightarrow x = 14 \sin(60°) = \frac{14 \sqrt{3} }{2} = 7 \sqrt{3} \\ \cos(60°) = \frac{y}{14} \Leftrightarrow y = 14\cos(60°) = \frac{14}{2} = 7[/tex]

To factor the expression x³ - y³ into factors of the lowest possible order, we can use the formula for factoring a difference of cubes: a³ - b³ = (a - b)(a² + ab + b²). In this case, we have x³ - y³, so our factors are (x - y)(x² + xy + y²). These are the factors using complex coefficients.

To factor the expression x³ - y³ into factors of the lowest possible order, we can use the formula for factoring a difference of cubes: a³ - b³ = (a - b)(a² + ab + b²). In this case, we have x³ - y³, so our factors are (x - y)(x² + xy + y²).

These are the factors using complex coefficients. To find the factors using real coefficients, we can use the fact that a complex conjugate pair of roots will always have real coefficients. Therefore, the factors using real coefficients will be (x - y)(x² + xy + y²).

Answer:

A

Step-by-step explanation:

The area of a square is A = s². So the area of this square is A = (2x+2)² = 4x² + 8x + 4.

The perimeter of the triangle is 4/3x + 4/3x+4/3x = 12/3x = 4x.

The difference between the two values is subtraction. Subtract the expressions and simplify.

4x² + 8x + 4 -4x = 4x² + 4x + 4

This expression is also equal to 3. Set it equal to 3 and solve for x.

4x² + 4x + 4 = 3

4x² + 4x + 1 = 0

Substitute a = 4, b = 4 and c = 1 into the quadratic formula.

The quadratic formula is [tex]x=\frac{-b+/-\sqrt{b^2-4ac} }{2a}[/tex].

Substitute and you'll have:

[tex]x=\frac{-b+/-\sqrt{b^2-4ac} }{2a} =\frac{-4+/-\sqrt{4^2-4(4)(1)} }{2(4)}=\frac{-4+/-\sqrt{16-16} }{8)}[/tex]

[tex]\frac{-4+/-\sqrt{0} }{8} = \frac{-4}{8}=\frac{-1}{2}[/tex]

Answer:

28 units

Step-by-step explanation:

The volume of the rectangular prism is 28 cubic units.

To find the volume of a rectangular prism, we use the formula:

Volume = Base Area * Height

The Base Area is 21/2 (21/2 = 10.5) and the Height is 8/3, we can calculate the volume as follows:

Volume = 10.5 * (8/3)

To multiply fractions, we simply multiply the numerators together and the denominators together:

Volume = (10.5 * 8) / 3

Volume = 84 / 3

To simplify the fraction, we can divide both the numerator and denominator by their greatest common divisor (GCD), which is 3:

Volume = 28

So, the volume of the rectangular prism is 28 cubic units.

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Answer:

C

Step-by-step explanation:

The scale is on 2 inches represents 30 feet that means for every 30 feet it's to inches on the scale and the stadium is 180 feet

180/30 to get 6 then times 6 by 2 to get 12. Because there 6 sets of 30 in 180. That's 12 on the scale because there 2 inches for every 30 feet that why you time the 6 by 2 to get 12 inches

I hope this helps you

Answer: About 43

Step-by-step explanation:

in each 75 there is 6 mistakes so 75-6=69

then if you divide 3000 by 69 you get 43 im pretty sure

To predict the number of defective products out of 3000, Ronen can use proportions. He found 6 defects in a sample of 75 products, which scales up to approximately 240 defects in 3000 products.

Ronen found that 6 out of 75 products had defects in a random sample. To predict how many out of 3000 products would have defects, we can set up a proportion because we are assuming that the sample proportion will be representative of the larger population. Here's the step-by-step explanation:

This calculates to 240. Therefore, Ronen can predict that approximately 240 out of 3000 products will have defects.

Answer:

D  550 ft²

Step-by-step explanation:

5.5 x 5 = 27.5

4 x 5 = 20

A = LW

27.5 x 20 = 550

Scaling is the process in which the dimension of an object is multiplied or increased by the same ratio.  The actual area of the rectangular patio is 550 feet².

Scaling is the process in which the dimension of an object is multiplied or increased by the same ratio.

As it is given that the ratio by which the patio is scaled is 1 inch = 5 feet. Therefore, a single inch on the drawing is 5 feet in the real world.

Now, the dimensions of the patio on the scale drawing are 5.5 inches by inches, therefore, each of the dimensions will be scaled.

[tex]\text{Length of the Patio}= 5.5\rm \times 5 = 27.5\ feet[/tex]

[tex]\text{Width of the Patio} = 4 \times 5 = 20\rm\ feet[/tex]

Further, the area of the rectangle is the product of its length and its breadth, therefore, the area of the rectangular patio is

[tex]\text{Area of the Patio} = Length \times Breadth\\[/tex]

                           [tex]= 27.5 \times 20\\\\= 550\rm\ feet^2[/tex]

Hence, the actual area of the rectangular patio is 550 feet².

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The range is the difference between the largest number and the smallest number.

The largest number given is 21, the smallest number given is 12.

21 - 12 = 9

The range is 9.

Answer: 9

Step-by-step explanation:

Range = subtract the highest number by the lowest number

Put the numbers in order from least to greatest.

12, 14, 15, 16, 17, 17, 21

21 - 12 = 9

There are 100 decameters (dam) in a kilometer (km).

4.5km x 100dam = 450 decameters

Answer: 450 decameters

Answer:

hi there

your answer to this is:

by using the equation πr² . the R is  the Radius  of the circle. then  multpitly   by it the base of the circle.  

I hope this helps you out

Have a great Morning

FaithRawlins14

Final answer:

The term 'circle' does not represent a 3D object with volume. For calculating volume, one must consider 3D shapes like cylinders or spheres which do have volume; their volumes are calculated using the formulas V = πr²h for cylinders, and V = 4/3 πr³ for spheres, respectively.

Explanation:

It seems there is a confusion in the question as a 'circle' is a 2D shape and does not have volume. However, if we are referring to a cylinder which has a circular base, then the volume can be calculated. To find the volume of a cylinder, we use the formula V = πr²h, where V represents volume, π is approximately 3.142, r is the radius of the circular base, and h is the height of the cylinder.

In the case of a sphere, a 3D object that could be mistaken as a 'circle' in conversations, the volume formula is given by V = 4/3 π r³. This is derived from geometric principles, ensuring the units match, and considering the sphere's volume in relation to a cube that would contain it. Applying this to an example, the volume of a sphere with a radius of 4.30 inches can be converted to cubic centimeters, and would be calculated using the volume formula for a sphere.

Answer:

rate of flow of hot water = 480 L/hour

and rate of flow of cold water = 720 L/hour

Step-by-step explanation:

Suppose rate of flow of hot water = x

and rate of flow of cold water = y

Given that,

Twice the water flow in the hot water pipe is equal to three times the water flow from the cold pipe.

Combined it equals 1200 L/hour.

According to the question

2x = 3y

x + y = 1200

x = 1200 - y

put this value of x in equation1

2(1200-y) = 3y

2400 - 2y = 3y

2400 = 5y

y = 480

x = 3(480)/2

x = 720

The flow rate in the hot water pipe is 720 L/hour, and the flow rate in the cold water pipe is 480 L/hour, solved through a system of linear equations.

The student's question involves solving a system of linear equations to find the flow rate in each pipe. The problem states that twice the flow in the hot water pipe is equal to three times the flow in the cold water pipe, and that combined, the flow is 1200 L/hour.

Let's define the flow in the hot water pipe as H liters per hour and the flow in the cold water pipe as C liters per hour. The two given conditions can be translated into the following equations:

To solve for H and C, we can use substitution or elimination method. First, we can solve Equation 1 for H to get:

H = 1.5C

Now, we substitute H in Equation 2 with 1.5C:

1.5C + C = 1200

Combining like terms, we get:

2.5C = 1200

Dividing both sides by 2.5, we find the flow rate of the cold pipe:

C = 1200 / 2.5

C = 480 L/hour

Now we can substitute C back into the equation for H to find the hot water flow:

H = 1.5 * 480

H = 720 L/hour

Therefore, the flow rate in the hot water pipe is 720 L/hour, and the flow rate in the cold pipe is 480 L/hour.

she could be any age from 1-19

Answer:

Step-by-step explanation:

The age is = (20) - (Annette Age)

The fourth option is correct.

See the attached image. The red cylinder represents a washer formed by the described revolution. Its volume is

[tex]\pi((\text{outer radius})^2-(\text{inner radius})^2)(\text{height})[/tex]

so when we integrate, we take

[tex]\displaystyle\pi\int_0^1((e^x+2)^2-3^2)\,\mathrm dx[/tex]

Final answer:

To calculate the radius of the cylindrical can, we use the volume of a cylinder formula, V = πr²h. After substituting the given values and solving for r, the radius of the can is found to be approximately 5.64 cm.

Explanation:

To find the radius of the cylindrical can that contains 1500 cm³ of coconut milk with a height of 15 cm, we can use the formula for the volume of a cylinder, V = πr²h, where V is the volume, r is the radius, and h is the height.

Given V = 1500 cm³ and h = 15 cm, we can rearrange the formula to solve for r (radius).

The rearranged formula is r = √(V/(πh))

Plug the values into the formula:

r = √(1500 cm³/(3.142 × 15 cm))

r = √(1500/47.13)

r = √(31.83)

r ≈ 5.64 cm

Therefore, the radius of the can is approximately 5.64 cm.

612 inches is the answer to your question

To convert 51 inches to feet and inches, divide by 12 to get 4 feet with a remainder of 3 inches, making the final measurement 4 feet 3 inches.

To convert 51 inches to feet and inches, we need to know that there are 12 inches in a foot.

Therefore, we can divide 51 by 12 to find out how many full feet we have and then take the remainder as the leftover inches.

To perform the calculation:

This conversion from inches to feet and inches is commonly used in various measurements such as personal height, the length of materials, or dimensions for construction.

Answer:

B

Explanation:

Solve for n:

Subtract 8 on both sides.

5n + 8 = 30

       -8    -8

Divide by 5 on both sides.

5n = 22

---     ----

5        5

Getting a solution of 4 2/5.

n = 4 2/5

Check:

5(4 2/5) + 8 = 30

22 + 8 = 30

30 = 30

Answer:

x = 15

Step-by-step explanation:

OP and PQ intersect at right angles since PQ is tangent to the circle. This implies that OQ will be the hypotenuse in the right angled triangle OPQ.

Applying Pythagoras theorem;

17^2 - 8^2 = x^2

x = 15

See in the explanation

Recall that you have to write complete question in order to get good and precise answers. I found a similar question and attached the options below. However, the question has missing graph, too. So let's face this problem in a general way.

1. It must be proportional because the points lie on the same line.

The points not not only must lie on the same line, but that line must pass through the origin because two quantities x and y are directly proportional if we can write an expression:

[tex]y=kx \\ \\ Being \ k \ the \ constant \ of \ proportionality[/tex]

That is, if x increases, y also increases at the same rate.

2. It must be proportional because each time x increases by 2, y stays the same.

In this case as x increases by 2, y stays the same, meaning that this relationship is constant. So in this case they aren't proportional, but we can write:

[tex]y=c \\ \\ Being \ a \ real \ constant[/tex]

3. It cannot be proportional because the y-values are not whole numbers:

This doesn't make sense. The only condition for a direct proportion is that the line must pass through the origin and for any constant of proportionality [tex]k[/tex]

4. It cannot be proportional because a straight line through the points does not go through the origin:

This is is true because the definition of direct proportion is that the line passes through the origin for some constant k:

[tex]y=kx[/tex]

So if I could see the graph, I'd choose the fourth option.

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Answer:

it cannot be proportional because a straight line through the point does not go through the origin

Step-by-step explanation:

Answer:

D. 10

Step-by-step explanation:

Answer:

C. 19 cars; 19 motorcycles

Step-by-step explanation:

Let c represent the number of cars and m represent the number of motorcycles that participated this year.

This year a total of 38 vehicles participated. So, we can write the equation as:

c + m = 38                                                (Equation 1)

Each car has 4 tires, so number of tires in c cars will be 4c.

Each motorcycle has 2 tires, so number of tires in m motorcycles will be 2m.

In total there were 114 tires, so we can set up the equation as:

4c + 2m = 114                                          (Equation 2)

From equation 1, m = 38 - c. Using this value in Equation 2, we get:

4c + 2(38 - c) = 114

4c + 76 - 2c = 114

2c = 114 - 76

2c = 38

c = 19

Using this value in equation 1, we get:

19 + m = 38

m = 19

Thus, 19 cars and 19 motorcycles participated in the ride.

Answer:

22 cars; 32 motorcycles

Step-by-step explanation:

I Did It On Study Island

Answer:

Step-by-step explanation:

Step 1:  rewrite the equation of the given line in to slope-intercept form by solving for y

  3y + 5x = 6    

     3y = -5x + 6               (subtract 5x from both sides)

        y = -(5/3)x + 2           (divide both sides by 3)

Step 2:  Our line is parallel to this line, so it has the same slope, and a

y-intercept of 4, so we have...

  y = -(5/3)x + 4      

*slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept,

Answer:

[tex]13.19\ m[/tex]

Step-by-step explanation:

step 1

Divide the total height by the number of step leading

[tex]\frac{24}{91}=0.2637\frac{m}{step}[/tex]

step 2

Multiply [tex]0.2637\frac{m}{step}[/tex] by 50 step

[tex]0.2637(50)=13.19\ m[/tex]

If you were standing on the 50th step of the pyramid, you would be approximately 13.185 meters above the ground, calculated by finding the height per step and multiplying by the number of steps climbed.

The task is to calculate how high above the ground you would be if you were standing on the 50th step of a pyramid that has a temple approximately 24 meters above the ground with a total of 91 steps leading up to the temple. To solve this, we will assume that the height the steps cover (24 meters) is evenly distributed across the number of steps (91). So, each step represents 24 meters divided by 91 steps in height.

First, let's calculate the height of each step:

Height per step = Total height / Number of steps

Height per step = 24 meters / 91 steps ≈ 0.2637 meters per step

Next, we need to calculate the height at the 50th step:

Height at 50th step = Height per step * Number of steps climbed

Height at 50th step = 0.2637 meters per step * 50 steps ≈ 13.185 meters

Therefore, if you were standing on the 50th step, you would be approximately 13.185 meters above the ground.

Answer:

Step-by-step explanation:

Use the Pythagorean theorem:

[tex]AB^2+BC^2=AC^2[/tex]

We have

[tex]AB=8\ cm,\ BC=x\ cm,\ AC=\sqrt{89}\ cm[/tex]

Substitute:

[tex]8^2+x^2=(\sqrt{89})^2\qquad\text{use}\ (\sqrt{a})^2=a\ \text{for}\ a\geq0\\\\64+x^2=89\qquad\text{subtract 64 from both sides}\\\\x^2=25\to x=\sqrt{25}\\\\x=5\ cm[/tex]

Answer:

The function is [tex]f(x) = 27(\frac{1}{3})^x[/tex]

Step-by-step explanation:

Compare the y values. Notice that the y values are all multiples of 3 and they decrease by dividing by 3 each time. This suggests the base is 1/3.

Now check when x = 0. This is the initial value since the zero exponent gives an output of 1. So the only way for (0,27) to be a point is for 27 to e multiplied as the initial value. The function is [tex]f(x) = 27(\frac{1}{3})^x[/tex]

Answer: mental maths

Step-by-step explanation:

The sum or the addition of the numbers 193 and  564 will be 757.

In mathematics, addition is defined as the summing up the two quantities or adding the two numbers it is denoted by + sign.

It is given that there are two numbers 193 and 564 so the sum will be calculated as:-

Addition = 193+564

Addition =757

Hence sum or the addition of the numbers 193 and  564 will be 757.

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on edge it's C. If Terrence samples 800 more people, his margin of error will be the same as Deena’s.

Answer:

Step-by-step explanation:

Margin of error is calculated as

Critical value multiplied by Std error of sample

= Critical value multiplied by square root of (variance/sample size)

Hence Margin of error

=[tex]z/t*(\frac{\sigma}{\sqrt{n} } )[/tex]

Thus square root of n is inversely proportion to margin of error.

Thus we have margin of error of Terrena would be square root of 3 times that of Deena

Thus option a, b and d are wrong

C is right because when sample sizes equal, the margin of error also would be equal.