It would really help ​

Answer:

  8

Step-by-step explanation:

Brenda sold 2 brass signs of the 10 signs she sold this week. You want an estimate of the number of brass signs she will sell out of the next 40.

We expect the proportion of brass signs to remain the same, so the number (x) of brass signs in the next 40 signs is expected to be ...

  x/40 = 2/10

  x = 40(2/10) = 8

We estimate Brenda will sell 8 brass signs out of the next 40 signs she sells.

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Answer:

Simplifying the expression `n + n - 0.18n`, we get:

n + n - 0.18n = 2n - 0.18n

Therefore, the expression `n + n - 0.18n` is equivalent to `2n - 0.18n`.

Looking at the answer choices:

a. 1.18n

b. 1.82n

c. n- 0.18

d. 2n - 0.82

We can see that choice d is equivalent to the simplified expression `2n - 0.18n`.

Therefore, the answer is d. 2n - 0.82.

Step-by-step explanation:

Answer:

A. 115

B. 65

C. 115

D. 65

E. 115

F. 665

G. 115

Step-by-step explanation:

a straight line is a 180 degree angle. If one of 2 angles is 65 degrees the other angle will be 115 because 180-65= 115

since both lines on the graph are parallel the angles will be coresponding.

The interval that is likely to contain the exact percent of all US adults who would support the policy is 0.7 ± 0.022.

Since the sample size is large (n = 2000) and the proportion of respondents who support the policy is 0.7, we can use the normal distribution to approximate the sampling distribution of the sample proportion.

The margin of error is ±2.2%, which means that we need to construct a 95% confidence interval. The critical value for a 95% confidence interval with a two-tailed test is approximately 1.96.

The formula for a confidence interval for a population proportion is:

sample proportion ± z* (standard error)

sqrt((sample proportion * (1 - sample proportion)) / n)

Substituting the values:

Therefore, the 95% confidence interval for the percentage of all U.S adults who would support a national policy requiring rooftop solar panels to be installed on all new homes is 0.678 - 0.722.

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The 80% confidence interval for the average water usage of 249 families is (15.42, 16.18) gallons.

To construct an 80% confidence interval for the average water usage of 249 families, we can use the following formula:

CI = X ± t(α/2, df) * (s/√n)

where X is the sample mean (15.8 gallons), t(α/2, df) is the critical t-value from the t-distribution table at the desired confidence level and degrees of freedom (247 in this case), s is the population standard deviation (1.7 gallons), and n is the sample size (249).

At an 80% confidence level and 247 degrees of freedom, the critical t-value is approximately 1.296.

Plugging in the values, we get:

CI = 15.8 ± 1.296 * (1.7/√249)

CI = 15.8 ± 0.38

Therefore, the 80% confidence interval for the average water usage of 249 families is (15.42, 16.18) gallons.

This means that we are 80% confident that the true average water usage of the population lies within this interval.

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Answer:7

Step-by-step explanation:

Answer:3

Step-by-step explanation:

The surface area of the triangular prism is 120 sq cm

From the question, we have the following parameters that can be used in our computation:

Dimensions = 10 cm 5 cm 5 cm 5 cm and 4 cm

Using the formula of the surface area of the triangular prism, we have

Surface area = bh + (l1 + l2 + l3) * h

Substitute the known values in the above equation, so, we have the following representation

Surface area = 10 * 5 + (5 + 5 + 4) * 5

Evaluate

Surface area = 120

Hence, the surface area is 120 sq cm

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The solution to the simultaneous equation is x = 6 and y = 3.

To solve this system of equations, we can use the method of elimination. First, we want to eliminate one of the variables, either x or y. In this case, it is easiest to eliminate y. To do so, we can multiply the second equation by 3, which gives us:

6x + 3y = 45

6x - 6y = 18

Now, we can subtract the second equation from the first:

6x + 3y - (6x - 6y) = 45 - 18

Simplifying this expression, we get:

9y = 27

Dividing both sides by 9, we get:

y = 3

Now that we know the value of y, we can substitute it into either equation to find the value of x. Let's use the first equation:

6x + 3y = 45

6x + 3(3) = 45

6x + 9 = 45

Subtracting 9 from both sides, we get:

6x = 36

Dividing both sides by 6, we get:

x = 6

Correct Question :

Solve the following simultaneous equation using algebra

6x+3y=45

2x-2y=6

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answear 12x

Step-by-step explanation:

6.5x-3.6x=

30x-18x=

12x

The degree of vertex B is 3.

Given is a figure we need to find the degree of vertex of point B,

So, the degree of a vertex is the line segment connected by it,

The point B is connected by three segment, FB, AB, CB.

Hence, the degree of vertex B is 3.

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The sum of the given two polynomials (x²-7x+14) + (x²+10x-4) is 2x² + 3x + 10

To find the sum of the polynomial expression, we need to add the like terms of the two polynomials.

The first polynomial is x²-7x+14 and the second polynomial is x²+10x-4. We can combine the terms with x² to get 2x².

Then, we can combine the x terms to get 3x.

Finally, we can combine the constant terms to get 10.

Therefore, the sum of the two polynomials is:

2x² + 3x + 10

In summary, we can find the sum of two polynomials by adding the like terms of the polynomials. We group the terms with the same degree of x, add them up and simplify the expression by combining the like terms.

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Answer:

Step-by-step explanation:

The option that is greater than 4 is option (a) 5. This is because 5 is a positive value that is larger than 4. Option (b) -5 is a negative value that is less than 4. Option (c) -1/2 is also negative and less than 4. Option (d) -25 is the most negative option and therefore less than 4. So, the only option that is greater than 4 in this case is 5.

Answer:

a

Step-by-step explanation:

got it right on edge

The Mayan notation is shown below.

1. 234

The highest power of 20 that will divide into 3575 is 20² = 400

So, 234/ 400 = 0.585

0.585 x 20=11.7

0.7 x 20= 14

So, 234₁₀= 11,14₂₀

Now, the Mayan notation will be

14 in the ones position three bars at the bottom of the number.

11 the 20s place, so that’s three bars and three dots in the second position.

2. 10503

The highest power of 20 that will divide into 3575 is 20² = 400

So, 10503/ 400 = 26.2575

0.2575 x 20= 5.15

05.15 x 20= 3

So, 234₁₀= 26, 5,3₂₀

Now, the Mayan notation will be

3 in the ones position three dots at the bottom of the number.

5 the 20s place, so that’s one bars and three dots in the second position.

and, 26 shows by 2 vertical dots and bar.

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Heather's new balance if her APR is 16.2% is, $1773.98

We have to given that;

Heather's statement shows a previous balance of $1413.92, a payment of $40, and new transactions totaling $381.51.

Hence, We have;

Previous balance: 1413.92

payment: 40

new transaction: 381.51

APR: 16.2%

So, We need to divide APR by 12 to get the monthly rate:

16.2% / 12 = 1.35%

⇒ 1413.92 - 40 = $1373.92

And, Interest for month = 1373.92 x 1.35%

                                    = $18.55

Since, We did not include 138 because it still is within the 1 month period and it is not subject to interest.

Only the revolving amount of 1373.92 has interest.

So, Heather's new balance if her APR is 16.2% is,

= 1373.92 + 18.55 + 381.51

= $1773.98

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Answer:

This (1.) unlikely

1) Polynomial of 4 terms.

2) The rational roots of the function are,

x = - 2, 1

3) The zeroes of the function are,

x = - 2, - 3, 2

4) The zeroes of the function are,

x = 1, - 1, 2i, - 2i

5) The correct function which shows the cubic equation is, option 1.

We have to given that;

1) Function is,

⇒ 3x⁵ + 5x⁴ - 7x³ + 15

Clearly, There are 4 terms in function.

Hence, Polynomial of 4 terms.

2) Function is,

⇒ x⁴ + 5x³ + 7x² - 3x - 10 = 0

The correct rational roots are satisfy the function,

Hence, We get;

Plug x = 1,

⇒ x⁴ + 5x³ + 7x² - 3x - 10 = 0

⇒ 1⁴ + 5(1)³ + 7 (1)² - 3(1) - 10 = 0

⇒ 0 = 0

Plug x = - 2;

⇒ x⁴ + 5x³ + 7x² - 3x - 10 = 0

⇒ 2⁴ + 5(2)³ + 7 (2)² - 3(2) - 10 = 0

⇒ 0 = 0

Thus, The zeroes of the function are,

x = - 2, 1

3) Function is,

⇒ y = (x + 3) (x + 2) (x - 2)

Hence, The zeroes of the function are,

x = - 3

x = - 2

x = 2

4) Function is,

⇒ 3x² - 4 = - x⁴

⇒ x⁴ + 3x² - 4 = 0

⇒ x⁴ + 4x² - x² - 4 = 0

⇒ x² (x² + 4) - 1 (x² + 4) = 0

⇒ (x² - 1) (x² + 4) = 0

⇒ x² - 1 = 0

⇒ x² = 1

⇒ x = ±1

⇒ x² + 4 = 0

⇒ x² = - 4

⇒ x = ±2i

Hence, The zeroes of the function are,

x = 1, - 1, 2i, - 2i

5) By given graph the  correct function which shows the cubic equation is, Option 1.

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Answer:

a)

[tex]4ydy = xdx[/tex]

[tex]2 {y}^{2} = \frac{1}{2} {x}^{2} + c[/tex]

[tex] {y}^{2} = \frac{1}{4} {x}^{2} + c [/tex]

[tex] {y}^{2} - \frac{1}{4} {x}^{2} = c [/tex]

b)

c = 4, so

[tex] {y}^{2} = \frac{1}{4} {x}^{2} + 4[/tex]

[tex]y = - \sqrt{ \frac{1}{4} {x}^{2} + 4} [/tex]

[tex]y = - \frac{ \sqrt{ {x}^{2} + 16} }{2} [/tex]

The expressions that can be used to represent the above model are

A. The number of fourths in 1.

b. Number of fourths in three

To represent the model, we need to note the range of the figures and the number of bars in each of the specified ranges. For, 0 to 1, there are four boxes which indicate a distribution of four to 1. So, we can say that this expression is the number of fourths in 1.

Also, when we look at it on a wider level, we can say that the number of fourths in 3 is a good descriptor since there are 12 fours in the total range of 3.

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a.  The magnitude of earthquake 7 is 1.259 times stronger than a magnitude 6 earthquake

b.  The magnitude of earthquake 9 is 1.995 times stronger than a magnitude 6 earthquake

The magnitude of an earthquake is given by M = 10㏒(A/A₀) where A = intensity of eartquake and A₀ = standard intensity

a. To find out how much stronger is a magnitude 7 earthquake than a magnitude 6 earthquake, we proceed as folllows.

For a magnitude of 7,

So, M = 10㏒(A'/A₀)

7 = 10㏒(A'/A₀)  (1)

For a magnitude of 6,

So, M = 10㏒(A'/A₀)

6 = 10㏒(A"/A₀) (2)

Subtracting (2) from (1), we have that

7 - 6 = 10㏒(A'/A₀) - 10㏒(A"/A₀)

1 = 10㏒[(A'/A₀) ÷ (A"/A₀)]

1 = 10㏒[(A'/A")

㏒[(A'/A")  = 1/10

Taking inverse logarithm, we have

(A'/A") = ¹⁰√10

= 1.259

So, it is 1.259 times stronger

b. To find out how much stronger is a magnitude 9 earthquake than a magnitude 6 earthquake, we proceed as folllows.

For a magnitude of 9,

So, M = 10㏒(A'/A₀)

9 = 10㏒(A'/A₀)  (1)

For a magnitude of 6,

So, M = 10㏒(A'/A₀)

6 = 10㏒(A"/A₀) (2)

Subtracting (2) from (1), we have that

9 - 6 = 10㏒(A'/A₀) - 10㏒(A"/A₀)

3 = 10㏒[(A'/A₀) ÷ (A"/A₀)]

3 = 10㏒[(A'/A")

㏒[(A'/A")  = 3/10

Taking inverse logarithm, we have

(A'/A") = 10⁰°³

= 1.259

So, it is 1.995 times stronger

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The limit exists and is equal to 6.

The limit exists and is equal to 4.

Now, let's use this concept to evaluate the limits of the given function F(x). Looking at the graph of F(x), we see that it approaches different values as x approaches different points. We will evaluate each limit separately:

lim F(x) as x → 1

As x approaches 1 from the left side, the function appears to be approaching a value of 2. Similarly, as x approaches 1 from the right side, the function appears to be approaching a value of 4. However, the limit does not exist as the function is not approaching a single value as x approaches 1.

lim F(x) as x → 3

As x approaches 3, the function appears to be approaching a value of 4.

lim F(x) as x → ∞

As x approaches infinity, the function appears to be approaching a value of 6.

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x at the vertex would help Charlie to find out how long it takes his basketball to reach the highest point.

When a quadratic function is in vertex form, the vertex (h, k) represents the highest or lowest point of the parabola.

In this case, the time it takes for the basketball to reach the highest point can be found by finding the x-value of the vertex of the function that represents the height of the basketball over time.

Therefore, option (A) x at the vertex would help Charlie to find the time at which the basketball reaches the highest point.

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Answer:

90° counterclockwise

Step-by-step explanation:

Find the center of rotation. This is the point that is equidistant from each vertex and its image. You can do this by drawing the perpendicular bisectors of the segments that connect each vertex and its image, and finding their intersection point. In this case, the center of rotation is the origin (0,0).

Choose a vertex and its image to measure the angle of rotation. For example, you can use A and A’. Draw a line segment from the center of rotation to each point, forming an angle.

Use a protractor or estimate the angle of rotation by comparing it to benchmark angles. In this case, the angle of rotation is about 90 degrees.

Determine the direction of rotation by observing which way the figure moved around the center of rotation. In this case, the direction of rotation is counterclockwise (positive).

Answer:

Step-by-step explanation:

[tex]\frac{9\sqrt{x} -6}{\sqrt{x} +7} \times \frac{\sqrt{x} -7}{\sqrt{x} -7} \\=\frac{9(x)-63\sqrt{x} -6\sqrt{x} +42}{(\sqrt{x} )^2-7^2} \\=\frac{9x-69\sqrt{x} +42}{x-49}[/tex]

The average rate of change over is 1.

Given that;

the function is,

⇒ g (t) = - (t - 1)² + 5

Hence, We need to determine the average rate of change over the interval - 4 ≤ t ≤ 5.

The value of G(-4):

The value of G(-4) can be determined by substituting t = -4 in the function

⇒ g (t) = - (t - 1)² + 5

Thus, we have,

⇒ g (t) = - (-4 - 1)² + 5

⇒ g (t) = - 20

Thus, the value of G(-4) = -20

The value of G(5):

The value of G(5) can be determined by substituting t = 5 in the function , we get,

⇒ g (t) = - (t - 1)² + 5

⇒ g (t) = - (5 - 1)² + 5

⇒ g (t) = - 11

Thus, the value of G(5) is, -11

Now, Average rate of change:

The average rate of change can be determined using the formula,

⇒ G(b) - G (a) / (b - a)

where, a = - 4 and b = 5

Substituting the values, we get,

⇒ G(5) - G (-4) / (5 - (-4))

⇒ ( - 11 - (- 20)) / 9

⇒ 9/9

⇒ 1

Thus, the average rate of change over the interval is. 1.

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The total surface area of the square pyramid is 99 cm²

An equation is an expression that can be used to show the relationship between two or more numbers and variables using mathematical operators.

The area of a figure is the amount of space it occupies in its two dimensional state.

To get the surface area:

Area of base = 10 cm * 2 cm = 20 cm²

Area of first triangle lateral face = (1/2) * 2 cm * 8 cm = 8 cm²

Area of second triangle lateral face = (1/2) * 10 cm * 6.3 cm = 31.5 cm²

Total surface area = 20 cm² + 2(8 cm²) + 2(31.5 cm²) = 99 cm²

The total surface area is 99 cm²

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Answer:

312 cm^2

Step-by-step explanation:

(6x24)+2(24x7/2)

144+168= 312

Answer: 2.4

Step-by-step explanation: obviously not anywhere close to 3 trust