could someone help me with this ? i need to find m

The expression that is equivalent to 38x + 85y + 38 + 12 − 72x − 25y is -34x + 60y + 50

An equation is an expression that shows the relationship between two or more variables or numbers.

Given the expression:

38x + 85y + 38 + 12 − 72x − 25y

Collecting like terms and simplying:

38x − 72x + 85y − 25y + 38 + 12

This gives:

-34x + 60y + 50

The expression that is equivalent to 38x + 85y + 38 + 12 − 72x − 25y is -34x + 60y + 50

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Without knowing the size of the outer circle, it is impossible to determine the exact area of the shaded region. However, we can use the circumference of the inner circle (125.6 inches) to find its radius, and then use that to calculate the area of the shaded region as a fraction of the area of the outer circle.

The formula for the circumference of a circle is C = 2πr, where r is the radius. We can rearrange this formula to solve for r:

r = C/2π

Plugging in the given circumference of the inner circle, we get:

r = 125.6/2π
r ≈ 19.998 inches

Since both circles have the same center, we know that the radius of the outer circle must be at least 19.998 inches longer than the radius of the inner circle. Let's call the radius of the outer circle R. Then:

R = r + 19.998
R ≈ 39.996 inches

The area of a circle is given by the formula A = πr^2. So the area of the inner circle is:

A_inner = πr^2
A_inner ≈ 1256.64 square inches

And the area of the outer circle is:

A_outer = πR^2
A_outer ≈ 5023.27 square inches

The area of the shaded region is the difference between these two areas:

A_shaded = A_outer - A_inner
A_shaded ≈ 3766.63 square inches

So the area of the shaded region is approximately 3766.63 square inches, but this answer depends on the radius of the outer circle, which is not given in the problem.

Answer:

  (B)  26°

Step-by-step explanation:

The angle at A made by the radius and the tangent is 90°. The angle at O is the same as arc AB, 64°. The acute angles in a right triangle are complementary, so the angle at C is the complement of 64°.

∠ACB = 90° -64°

∠ACB = 26°

Given:

The population, P, of six towns with time t in years are given by the following exponential equations:

(i) \(P=1000(1.08)^t\)

(ii) \(P = 600 (1.12)^2\)

(iii) \(P =2500 (0.9)^t\)

(iv) \(P=1200 (1.185)^t\)

(v) \(P=800 (0.78)^t\)

(vi) \(P=2000 (0.99)^t\)

To find:

The town whose population is decreasing the fastest.

Solution:

The general form of an exponential function is:

\(P(t)=ab^t\)

Where, a is the initial value, b is the growth or decay factor.

If b>1, then the function is increasing and if 0<b<1, then the function is decreasing.

The values of b for six towns are 1.08, 1.12, 0.9, 1.185, 0.78, 0.99 respectively. The minimum value of b is 0.78, so the population of (v) town  \(P=800 (0.78)^t\) is decreasing the fastest.

Therefore, the correct option is b.

Answer:

33 grams remain after 16 years

Step-by-step explanation:

The formula is \(A= A_{o} (0.5)^{t/h}\)

h = 27

Ao = 50

t = 16

So enter into formula

\(A=50(0.5)^{16/27}\)

\(A=50(0.5)^{0.59259259259} \\A= 50(0.66315012286)\\A= 33.158\)

After rounding to the nearest whole number,

33.158 is = 33

Answer:

the 3rd graph

Step-by-step explanation:

had a green ✔

Answer:

C

Step-by-step explanation:

Answer:

4-6=-2

4.

rotational - no

reflectional - yes

angle - 90° (vertical)

5.

rotational - no

reflectional - yes

angle - 90° (vertical)

6.

rotational - omnidirectional

reflectional - yes

angle - 90° (vertical)

aswell as (horizontal)

Answer:

The radius would be 12cm

and the height 4

gives u the surface area of 1206cm^3

Step-by-step explanation:

The linear equation that passes through these two points is:

y = -4x

A general linear equation can be written as:

y = a*x + b

Where a is the slope and b is the y-intercept.

If we know that the line passes through two known points (x₁, y₁) and (x₂, y₂), then we can write the slope as:

a = (y₂ - y₁)/(x₂ - x₁)

Here we know the two points (-2, 8) and (5, -20), so the slope is:

a = (-20 - 8)/(5 + 2) = -28/7 = -4

So the line is:

y = -4*x + b

To find the value of b, we can replace the values of the point (-2, 8), so we will get:

8 = -4*(-2) + b

Now we can solve this for b.

8 = -4*(-2) + b

8 = 4*2 + b

8 = 8 + b

8 - 8 = b

0 = b

Then the linear equation is:

y = -4*x

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The value of the function at x = 4 is 8.79.

Tangent line approximation is the approximation of any function using a linear function. It is also called as linear approximation.

It allows us to approximate the value of a general function with a more simpler linear function.

Given that,

f(1) = 2

f'(x) = \(\sqrt{x^{2} +2cos x + 3}\)

We have the formula for linear approximation as,

f(x) = f(a) + f'(a) (x - a)

Here x = 4 and a = 1

f(a) = f(1) = 2

f'(a) = f'(1) = \(\sqrt{1^{2} +2cos 1 + 3}\) = 2.254

Substituting,

f(4) = 2 + (2.254) (4 - 1)

     = 8.762 ≈ 8.79

Hence the value of f(4) is 8.79.

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When comparing means of three or more conditions, an analysis of variance (ANOVA) should be used instead of multiple t-tests. This is because using multiple t-tests increases the risk of a type I error, where a significant difference is found when there is none. ANOVA controls for this by using a single test to determine if there is a significant difference between the means. Additionally, using multiple t-tests increases the risk of a type II error, where a significant difference is not found when there is one.

ANOVA is also more likely to detect statistical significance between the means because it takes into account the variability within each condition as well as the variability between conditions. This increases the power of the test and reduces the chances of missing a significant difference between the means.

When using ANOVA, the results can indicate that there are no differences between any of the population means (option a), that at least one of the three population means is different from another population mean (option b), that all three of the population means are different from each other (option c), or that one population mean is different from one of the other population means, but not the other population mean (option d).

Finally, ANOVA provides a measure of effect size, typically reported as r2, which indicates the proportion of variability in the data that can be attributed to the differences between the conditions. This can be useful in determining the practical significance of the results.

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Multiplication is the opposite of division. When we multiply 4.15*3 we get 13.53.

Multiplication is one of the four basic arithmetic operations, alongside the addition, subtraction, and division. In math, multiply means the repeated addition of groups of the equal sizes.

The symbols for multiplication are cross (x), asterisk (*), and dot (.). You seem to utilize the cross a lot when you write in your notebooks. In both algebra and computer languages, the asterisk and dot are symbols (higher mathematics).

Commutative Property: According to this property, when we multiply two numbers, the result will not change depending on the order.

Associative property: It states that if we multiply three or more numbers consecutively, the order is irrelevant.

4.51

X   3

-----------

13.53

-----------

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Answer:

A=2

B=-1

Step-by-step explanation:

a=(23−25)⋅ (4−5)=2

b=(97−123)/(18+8)=−1

Answer:

7

-by-step explanation:

none needed just do it in your head like 21 devided by 3=7

Answer:

Step-by-step explanation:

Answer:

X=twenty four

Step-by-step explanation:

Answer:

if its referring to line rather than angle x should be 12

Step-by-step explanation:

Answer:

x = 17

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Sum the 3 angles and equate to 180, that is

6x - 15 + 4x - 7 + 2x - 2 = 180, that is

12x - 24 = 180 ( add 24 to both sides )

12x = 204 ( divide both sides by 12 )

x = 17

The addition equation to represent Jackson's net change in money is x + (-y) = 4.63

A system of equations is two or more equations that can be solved to get a unique solution. the power of the equation must be in one degree.

Jackson receives 4.63 as his change at the grocery store. He places it into a charity donation jar at the register.

WE need to Write an addition equation to represent Jackson's net change in money.

Given that :

The change received = 4.63

The Net change in money :

Let initial amount before purchase is represented by  x

The Cost of item purchased = y (negative as it is incurred)

The Net change in money:

Initial amount + cost of item purchased = change received

x + (-y) = 4.63

Therefore, an addition equation to represent Jackson's net change in money is x + (-y) = 4.63

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Answer:

-4.5

Step-by-step explanation:

\(6x+5.5=3x-8\\\)

\(6x-3x=-8-5.5\)

\(3x=-13.5\)

\(x=\frac{-13.5}{3}\)

\(x=-4.5\)

The length of EF in the right triangle is √180. The correct option is A. √180

The Pythagorean theorem states that in a right triangle, the square of the longest side (hypotenuse) equals sum of squares of the other two sides.

In the given diagram, we can then write that

/DE/² = /DF/² + /EF/²

From the given information,

/DE/ = 18

/DF/ = 12

Putting the parameters into the equation, we get

18² = 12² + /EF/²

324 = 144 + /EF/²

/EF/² = 324 - 144

/EF/² = 180

/EF/ = √180

Hence, the length of EF in the right triangle is √180. The correct option is A. √180

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$87.50is the total cost of the materials.

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The conditions that must be met to use the normal approximation for the confidence level are np>5 and n(1-p)>5

Sampling Distribution: A sampling distribution is a probability distribution of a statistic that is obtained through repeated sampling of a specific population. It describes a range of possible outcomes for a statistic, such as the mean or mode of some variable, of a population.

Given that the sampling distribution of the population proportion is based on a binomial distribution.

The conditions that must be met to use the normal approximation for the confidence level are np>5 and n(1-p)>5

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Answer:

6x

Step-by-step explanation:

sqarue root is 2.449

The scale factor is 11.

Scale factor is a numerical value used to proportionally enlarge or reduce a size of an object or image. It is also used to compare two similar shapes or objects. When the scale factor is greater than 1, it indicates an increase in size and when the scale factor is less than 1, it indicates a decrease in size. Scale factors are usually expressed as a ratio, such as 1:2, which means that the object has been doubled in size.

To calculate it, divide the first number by the second number and multiply by the third number: (35/42) x 11 = 10.714. Therefore, the scale factor is 11.

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Answer:

The answer is the last one.

Step-by-step explanation:

They paid $24.10 dollars, they paid $1.25 each and they paid $2.70 per mile. So, we subtract 2.50 from 24.10, since Landis and her father went together. And then, we divide our answer by 2.70.

24.10 - 2.50 = 21.60

21.60/2.70 = 8

They drove 8 miles.

The direction in which the maximum rate of change of f occurs at the point (5, 6, -1) is approximately (-0.17, -0.11, -0.98).

To find the maximum rate of change of the function f at the given point (5, 6, -1) and the direction in which it occurs, we can calculate the gradient of f at that point.

The gradient vector represents the direction of maximum increase of the function, and its magnitude represents the rate of change in that direction.

The gradient vector (∇f) of f(x, y, z) = (8x + 5y)/z can be found by taking the partial derivatives with respect to each variable:

∂f/∂x = 8/z

∂f/∂y = 5/z

∂f/∂z = -(8x + 5y)/z^2

Evaluated at the point (5, 6, -1), we have:

∂f/∂x = 8/(-1) = -8

∂f/∂y = 5/(-1) = -5

∂f/∂z = -((8(5) + 5(6))/(-1)^2) = -46

So, the gradient vector (∇f) at the point (5, 6, -1) is (-8, -5, -46).

The maximum rate of change of f at this point is given by the magnitude of the gradient vector:

|∇f| = √((-8)^2 + (-5)^2 + (-46)^2) = √(64 + 25 + 2116) = √2205 = 47.

Therefore, the maximum rate of change of f at the point (5, 6, -1) is 47.

To determine the direction in which this maximum rate of change occurs, we normalize the gradient vector by dividing it by its magnitude:

Direction vector = (∇f) / |∇f| = (-8/47, -5/47, -46/47).

Hence, the direction in which the maximum rate of change of f occurs at the point (5, 6, -1) is approximately (-0.17, -0.11, -0.98).

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Answer:

x = 92 degrees

Step-by-step explanation:

Trapezoids have 360 degrees

53 + 126 + 89 + x = 360

x = 92