I need help asap!!! The person who answers and shows their work on they got the answer first will be marked the brainliest!!!

The average for the 5 tests is a 74.

The total of the 5 grades needs to equal 5 x 74 = 370

The total of the 4 graded tests is : 76 +80 + 69 + 71 = 296

Subtract that from the first total: 370 - 296 = 74

The grade needs to be a 74

Answer:

57%

Step-by-step explanation:

We are given the results of survey of one thousand families to determine the distribution of families by their size.

We are to find the probability (to the near percent) that a given family has 3, 4 or 5 people.

Frequency of families with 3, 4 or 5 people = 200 + 245 + 125 = 570

Total frequency = 1000

P (families with 3, 4 or 5 people) = (570 / 1000) × 100 = 57%

Answer:

60°

Step-by-step explanation:

Here we are given that the number of convertibles cars. Total number of cars owned by the dealers is 90. We have to draw the pie graph for above ratio. The pie chart is a circular statistical graph , where the different portion in form of sectors on the circle showing the amount of different entities.

The angle covered by an entity is in the same proportion as its number is in ration to the total number of all the entities.

Hence

[tex]\frac{15}{90}=\frac{\theta}{360}\\\\\theta=\frac{15*360}{90}\\\theta=\frac{15*4}{1}\\\theta=60\\[/tex]

Hence we will represent 60 degrees in order to represent 15 cars in our chart.

To represent convertibles on the pie graph, calculate the proportion of convertibles sold to the total number of cars sold (15/90) and multiply by the total degrees in a circle (360). Convertibles should be represented by a 60-degree slice on the pie graph.

The question is asking how to calculate the degree measure for the convertibles slice in a pie chart based on the total sales in a month. We know that a pie chart represents 100% of a data set, with the entire chart being a 360-degree circle. To find the degree measure for the convertibles, we would perform a proportion calculation based on the number of convertibles sold (15) out of the total number of cars sold (90). The calculation is as follows:

Proportion of convertibles to total sales = (Number of convertibles sold / Total cars sold) = 15 / 90

Now, multiply this proportion by the total degrees in a circle to get the degree measure for convertibles:

Degree measure for convertibles = Proportion of convertibles imes Total degrees in a circle = (15 / 90) * 360 = 1/6 * 360 = 60 degrees

Therefore, the convertibles should be represented by a 60-degree slice on the Pie Graph.

Answer:

the first one is 350 inches (350 in) and the second on is 350 square inches (350 in2)

Step-by-step explanation:

Answer:

y=(3/2)x+4

Step-by-step explanation:

step 1

Find the slope m

we have

the points (4, 10) and (2, 7)

The slope is equal to

m=(7-10)/(2-4)

m=3/2

step 2

Find the equation into slope point form

y-y1=m(x-x1)

we have

m=3/2

(x1,y1)=(2,7)

substitute

y-7=(3/2)(x-2)

y=(3/2)x-3+7

y=(3/2)x+4

Answer: train A arrives first

Step-by-step explanation:

Answer:

b.

Step-by-step explanation:

We have to look at sign changes in f(x) to determine the possible positive real roots.

[tex]f(x)=-3x^4-5x^3-x^2-8x+4[/tex]

There is only one sign change here, between the -8x and the +4.  So that means there is only 1 possible real positive root.

Now we have to look at sign changes in f(-x) to determine the possible negative real roots.

[tex]f(-x)=-3x^4+5x^3-x^2+8x+4[/tex]

There are 3 sign changes here.  That means there are either 3 negative roots or 3-2 = 1 negative root.  So we have:

1 positive

3 or 1 negative

We need to pair them up now with all the possible combinations.

If we have 1 positive and 1 negative, we have to have 2 imaginary

If we have 1 positive and 3 negative, we have to have 0 imaginary

Keep in mind that the total number or roots--positive, negative, imaginary--have to add up to equal the degree of the polynomial.  This is a 4th degree polynomial, so we will have 4 roots.

Answer:

(m-5) (n-4)

Step-by-step explanation:

mn - 4m - 5n + 20

We will factor by grouping

mn -5n  -4m +20

Factor an n out of the first 2 terms and a -4 out of the last 2 terms

n (m-5) -4(m-5)

Now factor out a m-5

(m-5) (n-4)

[tex]\bf ~~~~~~ \textit{Compound Interest Earned Amount \underline{for the first 3 years}} \\\\ A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$20000\\ r=rate\to 6\%\to \frac{6}{100}\dotfill &0.06\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{per annum, thus once} \end{array}\dotfill &1\\ t=years\dotfill &3 \end{cases}[/tex]

[tex]\bf A=20000\left(1+\frac{0.06}{1}\right)^{1\cdot 3}\implies A=20000(1.06)^3\implies \boxed{A=2382.032} \\\\[-0.35em] ~\dotfill\\\\ ~~~~~~ \textit{Compound Interest Earned Amount \underline{for the next 4 years}}[/tex]

[tex]\bf A=P\left(1+\frac{r}{n}\right)^{nt} \quad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill &\$2382.032\\ r=rate\to 8\%\to \frac{8}{100}\dotfill &0.08\\ n= \begin{array}{llll} \textit{times it compounds per year}\\ \textit{per annum, thus once} \end{array}\dotfill &1\\ t=years\dotfill &4 \end{cases}[/tex]

[tex]\bf A=2382.032\left(1+\frac{0.08}{1}\right)^{1\cdot 4}\implies A=2382.032(1.08)^4\implies \boxed{A\approx 3240.73} \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{amount for this period}}{2382.032+3240.73}\implies 5622.762[/tex]

Answer:

8

Step-by-step explanation:

Answer:

8

Step-by-step explanation:

Check the picture below.

Answer:

A. [tex]\text{sin}^{-1}(\frac{2}{3})\approx 42^{\circ}[/tex]

B. [tex]\text{tan}^{-1}(4)\approx 76^{\circ}[/tex]

C. [tex]\text{cos}^{-1}(0.1)\approx 84^{\circ}[/tex]

Step-by-step explanation:

We have been given inverse trigonometric functions. We are asked to find the value of each function.

A. [tex]\text{sin}^{-1}(\frac{2}{3})[/tex]

We will use inverse sin to solve our given equation as:

[tex]\text{sin}^{-1}(\frac{2}{3})=41.81^{\circ}[/tex]

Round to nearest degree:

[tex]\text{sin}^{-1}(\frac{2}{3})\approx 42^{\circ}[/tex]

B. [tex]\text{tan}^{-1}(4)[/tex]

We will use inverse tann to solve our given equation as:

[tex]\text{tan}^{-1}(4)=75.963756^{\circ}[/tex]

Round to nearest degree:

[tex]\text{tan}^{-1}(4)\approx 76^{\circ}[/tex]

C. [tex]\text{cos}^{-1}(0.1)[/tex]

We will use inverse cosine to solve our given equation as:

[tex]\text{cos}^{-1}(0.1)=84.2608295^{\circ}[/tex]

Round to nearest degree:

[tex]\text{cos}^{-1}(0.1)\approx 84^{\circ}[/tex]

To solve the problem we must know about the concept of trigonometry.

The value of  [tex]\rm sin^{-1} (2/3), tan^{-1}(4), and\ cos^{-1}(0.1)[/tex] is 42, 76, and 85 degrees respectively.

Trigonometry deals with the relationship between the sides and angles of a right-angle triangle.

Given

[tex]\rm sin^{-1} (2/3), tan^{-1}(4), and\ cos^{-1}(0.1)[/tex] are the trigonometric function.

To find

The value of the [tex]\rm sin^{-1} (2/3), tan^{-1}(4), and\ cos^{-1}(0.1)[/tex].

[tex]\rm 1. \ \ sin^{-1} (2/3) = 41.81^o = 42^o\\\\ 2. \ \ \ \ \ tan^{-1}(4) = 75.96^o = 76^o \\\\3. \ \ cos{-1}(0.1)= 84.26^o = 85^o[/tex]

The value of  [tex]\rm sin^{-1} (2/3), tan^{-1}(4), and\ cos^{-1}(0.1)[/tex] is 42, 76, and 85 degrees respectively.

More about the trigonometry link is given below.

https://brainly.com/question/22698523

Answer:

B.

Step-by-step explanation:

The function is positive when it is above the x-axis

The following x values are where the function has positive y coordinates:

(-2,0)

(4,inf)

The function is negative when it is below the x-axis

The following x values are where the function has negative y coordinates:

(-inf,-2)

(0,4)

So you should see all of these intervals listed in choice B

Answer:

B

Step-by-step explanation:

Answer:

-1/10, -1/5 , -2/5 or -2/5, -1/5 , -1/10

Step-by-step explanation:

let a/r, a, ar  be the first 3 terms of the geometric series

their product would be equal to a^3

a^3=-1/125

a=-1/5

Substitute a=-1/5 into the first 3 terms

-1/5r + -1/5+-r/5=-7/10

Multiply the terms such that they have a common denominator:

-1/5r +-r/5r + -r^2/5r = -3.5r/5r

Multiply both sides by 5r

-r^2-r-1=-3.5r

Add 3.5r to both sides and multiply the equation by 2

-2r^2 + 5r -2=0

Factorize the equation

(2r-1)(r-2)=0

r=0.5 or r-2

For the first three terms where r=0.5

-2/5, -1/5 , -1/10

For the first three terms where r=2

-1/10, -1/5 , -2/5

Temperature can relate to how cold the ice cream cone is.

The ice cream cone(s) can relate to all the buildings in the city.

Step-by-step explanation:

Expressions do not have an equal sign (although they can have operators such as plus or minus).

[tex]2x+1[/tex] is an expression.

[tex]2x+1=1[/tex] is an equation since it has an equal sign.

Which display can be used to find how many days had a high temperature above 15 deg?

Answer: A  The dot plot

In the dot plot, you can see each temperature since each temperature is represented by 1 dot.

Which display makes it easier to see that the first quartile is 9 deg?

Answer: B  The box plot

The box plot shows where the upper and lower quartiles are.

Answer:

First question: A . The dot plot

Second question: B . The box plot

Step-by-step explanation:

In the dot plot it is easy to count 7 values above 15.

In the box plot are shown (in this order): the minimum value; the lower quartile, called Q1; the median, the upper quartile, also called Q3; and the maximum value. As can be seen in the graph, the the first quartile is 9 °C

Answer:

The answer is the 2nd one

Step-by-step explanation:

A dilation is a transformation in which the lines connecting every point P with its image P' all intersect at a point C.

C is called the center of dilation, and CP'/CP is the same for every point P.

The only picture where the objects are similar and the image has not been rotated or reflected is

It is also seen from the picture that all the faces of the first figure appears to be parallel to all the faces of the second figure. Thus, CP'/CP is the same for every point P.

Therefore, the transformation in the picture above appears to be a dilation.

The transformation in the picture above appears to be a dilation is option 2nd.

Dilation of a figure will leave its sides get scaled (multiplied) by same number. That number is called the scale factor of that dilation.

Its also called scaling of a figure, but due the involvement of coordinates, it involves a center of a dilation, which is like a pinned point which stays at same place after dilation.

Its like we enlarge or shorten the size of the figure (or keep it same, when scale factor = 1).

C is called the center of dilation, and CP'/CP is the same for every point P.

It is also seen from the picture that all the faces of the first figure appear to be parallel to all the faces of the second figure.

Thus, CP'/CP is the same for every point P.

Therefore, the transformation in the picture above appears to be a dilation is option 2nd.

Learn more about dilation here:

https://brainly.com/question/27212783

#SPJ2

1. The first step to solving this problem is to find the values of x and y. This can be done in a multitude of different ways, however I will go with the method of substitution.

Thus, the first thing we must do is write out both equations and rearrange one of them so that either x or y is the subject of the equation. Looking at the two equations, I can see that in the second equation this would be easier, and that we could also simplify the first equation a little further. Thus:

a) Collecting like terms to simplify equation 1:

4x + 3y = 14 - y

4x + 4y = 14 (Add y to both sides)

b) Rearranging equation 2 to make x the subject:

x - 5y = 2

x = 2 + 5y (Add 5y to both sides)

Now, we can substitute x = 2 + 5y into the first equation:

4x + 4y = 14

if x = 2 + 5y:

4(2 + 5y) + 4y = 14

8 + 20y + 4y = 14 (Expand 4(2 + 5y))

8 + 24y = 14 (Add 20y and 4y)

24y = 6 (Subtract 8 from both sides)

y = 1/4 (Divide both sides by 24)

Now that we know that y = 1/4, we can substitute this back into x = 2 + 5y:

x = 2 + 5y

if y = 1/4: x = 2 + 5(1/4)

x = 2 + 5/4

x = 13/4

2. So now we know that x = 13/4 and y = 1/4. Given these values, we can now solve x - y as such:

x - y = 13/4 - 1/4

= 12/4

= 3

Thus, the value of x - y is 3 (answer C).

Answer:

1/2 is the answer (actually, it's ±1/2)

Step-by-step explanation:

The identity you need here is for a half angle of tangent.  That identity is as follows:

[tex]tan(\frac{\theta }{2})=[/tex]±[tex]\sqrt{\frac{1-cos\theta }{1+cos\theta } }[/tex]

If we need the cos of that angle, we need to find the missing hypotenuse.  Applying Pythagorean's Theorem to that right triangle, we get that the hypotenuse is 5.  The cos of the angle is 3/5.  Filling in the formula, using only the principle root since you have not allowed for the negative in the choices you gave:

[tex]tan(\frac{\theta }{2})=\sqrt{\frac{1-\frac{3}{5} }{1+\frac{3}{5} } }[/tex]

Turning each one of those 1's into 5/5 we combine the fractions to simplify to:

[tex]tan(\frac{\theta }{2})=\sqrt{\frac{\frac{2}{5} }{\frac{8}{5} } }[/tex]

Bringing up the lower fraction and flipping to multiply gives us:

[tex]tan(\frac{\theta }{2})=\sqrt{\frac{2}{5}*\frac{5}{8}  }[/tex]

Canceling out the 5's and reducing the remaining fraction gives us

[tex]tan(\frac{\theta }{2})=\sqrt{\frac{1}{4} }[/tex]

and since the square root of 4 is 2, we end with a solution of 1/2

Answer: 2l+2w

Step-by-step explanation:

Answer:21 plus 2w

Step-by-step explanation:

Answer:

Vertical stretch by a factor of 5.8 , reflection across x-axis ⇒ answer B

Step-by-step explanation:

* Lets revise the vertical and horizontal stretch with reflection

- A vertical stretching is the stretching of the graph away from the

 x-axis

- If k > 1, the graph of y = k•f(x) is the graph of f(x) vertically stretched

 by multiplying each of its y-coordinates by k.

- If k should be negative, the vertical stretch is followed by a reflection

 across the x-axis  

- A horizontal stretching is the stretching of the graph away from

 the y-axis

- If 0 < k < 1 (a fraction), the graph of y = f(k•x) is f(x) horizontally

 stretched by dividing each of its x-coordinates by k.

- If k should be negative, the horizontal stretch or shrink is followed

 by a reflection in the y-axis

* Lets solve the problem

∵ G(x) = sin x

∵ F(x) = -5.8 sin x

∴ F(x) = -5.8 G(x)

- From the rule above

∴ G(x) is stretched vertically by scale factor -5.8

∵ The scale factor is negative

∴ The vertical stretch is followed by a reflection across the x-axis  

* The transformation is:

  Vertical stretch by a factor of 5.8 , reflection across x-axis

To obtain the graph of f(x) = -5.8sin x from g(x) = sin x, a vertical stretch by a factor of 5.8 and a reflection across the x-axis are required.

To transform the graph of the function g(x) = sin x into the graph of f(x) = -5.8sin x, two main transformations are required:

Option B (vertical stretch by a factor of 5.8 and reflection across the x-axis) correctly describes the required transformations to obtain the graph of f(x) from the graph of g(x).

9680 yards. Miles biked a total of 9680 yards.

The key to solve this problem is coverting the Mixed Fraction to Improper Fraction, and make the conversion from miles to yards.

Convert the Mixed Fraction 5 1/2 to an Improper Fraction:

- Multiply the whole number 5 by the denominator

5 x 2 = 10

- Add the result to the numerator

1 + 10 = 11

- Write the Improper Fraction with the same denominator of the Mixed Fraction, and the numerator with the result above

5  1/2 miles ---------->  11/2 miles

To convert miles to yard with mile = 1760 yards:

11/2 * 1760 yards = 19360 yards/2 = 9680 yards

Final answer:

Miles biked for a total of 5 1/2 miles. By converting miles to yards using the fact that there are 1,760 yards in one mile, Miles biked a total of 9,680 yards.

Explanation:

The student has asked how many yards Miles biked if he rode a total of 5 1/2 miles. To find the answer, we need to convert miles to yards. Since there are 1,760 yards in a mile, we can multiply the number of miles by this conversion factor.

First, let's represent 5 1/2 miles as an improper fraction: 5 1/2 = 11/2 miles. Next, we multiply 11/2 by 1,760:

11/2 miles
= 11/2
* 1760 yards/mile
= 11*880 yards
= 9,680 yards.

Therefore, Miles biked a total of 9,680 yards.

Answer: I think it is A.

Step-by-step explanation:

Answer:

C:  (x + 4)(x - 1)

Step-by-step explanation:

Please use " ^ " to indicate exponentiation.  Thanks.

x2 + 3x – 4 →  x^2 + 3x - 4 = (x + 4)(x - 1)      This matches Answer C.

Answer:

255

Step-by-step explanation:

(2+2+3+10) × (8+9+-9+7)

First, remove the brackets:

2 + 2 + 3 + 10 × 8 + 9 + -9 + 7

Now calculate like so:

2 + 2 + 3 + 10 = 17

8 + 9 + -9 + 7 = 15

(17) × (15) = 17 × 15 = 255

PLEASE DO MARK ME AS BRAINLIEST UWU

Answer:

Your answer for this question is 255.

Step-by-step explanation:

To solve this problem, we must remember how to use PEMDAS.  This tells us that we must simplify what is in parentheses first, exponents next, then multiplication and division, and finally addition and subtraction.  In this case, this means that we must first perform the operations inside of the parentheses before the multiplication of the two groups of parentheses.

If we simplify within both groups of parentheses, we get:

(2+2+3+10) * (8+9+-9+7)

= (17) * (15)

We get the above simplification by performing the addition of all of the constants in the first group of parentheses and performing the addition and subtraction in the second group (notice that the +9 and -9 cancel each other out).

Now, we must simply multiply together our final two values to obtain our final answer.

17 * 15 = 255

Therefore, your answer is 255.

Hope this helps!

Answer:

5 year  = $2,400

20 year = $18,560

Step-by-step explanation:

Firstly,

You have to identify the cash value per unit. so It 'll be  5 years = 30 dollars per unit.

Secondly,

Now, take the face value of the policy divided by 1000, to find how many units the person has. 80,000 divided by 1000 is 80. Now take the # of units time the cash value it has. so It'll be 80 times 30 is $2,400

Answer: $2,400

Now,

Just like the previous one identify the cash value per unit. so It'll be 20 years= 232 dollars per unit.

Next,

take the face value of the policy divided by 1000, to find how many units the person has. 80,000 divided by 1000 is 80. Now take the # of units time the cash value it has. 80 times 232 is $18,560

Answer:  $18,560

Answer:

x² + 8x + 16

Step-by-step explanation:

You can draft the Pascal's Triangle as below;

                                             Exponent

                  1-----------------------0

               1     1  -------------------1

             1   2    1 ------------------2

            1  3   3   1 -----------------3

According to the question, we use values for exponent 2 because (a+b)²

Given  (x+4)²...................................expand

x² × 4⁰ + x¹ × 4¹+ x⁰ × 4²

x² × 1 + x × 4 + 1 × 16

x² + 4x + 16---------------------------------introduce values in exponential 2 of the table which are 1  2  1

x² × 1 + 2 × 4x + 16 × 1

⇒ x² + 8x + 16

Answer:

  (-2, 2)

Step-by-step explanation:

You can graph the equations and points and see which points fall into the doubly-shaded area. The only one that does is (-2, 2).

___

You can also evaluate the inequalities at the given points to see which might work. The inequality y > x is the simplest to evaluate, and it immediately eliminates the last two choices:

  -3 > -1 . . . not true

  -1 > 0 . . . not true

So, we can check the first two choices in the first inequality:

  -(-3) +1 > 5 . . . not true

  -(-2) +1 > 2 . . . TRUE

The ordered pair (-2, 2) makes both inequalities true.

Answer:

2nd Option is correct.

Step-by-step explanation:

Given Inequalities are,

y < x + 1  .....................(1)

y > x .....................(2)

To find: Ordered pair which makes he inequalities true.

Pair 1:

x = -3 , y = 5

Inequality (1),

LHS = 5

RHS = -(-3) + 1 = 4

⇒ LHS > RHS

Thus, this pair does not satisfy the pair of inequalities.

Pair 2:

x = -2 , y = 2

Inequality (1),

LHS = 2

RHS = -(-2) + 1 = 3

⇒ LHS < RHS

Inequality (2),

LHS = 2

RHS = -2

⇒ LHS > RHS

Thus, this pair satisfies the pair of inequalities.

Pair 3:

x = -1 , y = -3

Inequality (1),

LHS = -3

RHS = -(-1) + 1 = 0

⇒ LHS < RHS

Inequality (2),

LHS = -3

RHS = -1

⇒ LHS < RHS

Thus, this pair does not satisfy the pair of inequalities.

Pair 4:

x = 0 , y = -1

Inequality (1),

LHS = -1

RHS = -(0) + 1 = 1

⇒ LHS < RHS

Inequality (2),

LHS = -1

RHS = 0

⇒ LHS < RHS

Thus, this pair does not satisfy the pair of inequalities.

Therefore, 2nd Option is correct.

Answer: [tex]15.57\°[/tex]

In order to understand better this problem, we can use the figure attached, in which we have a right triangle (with a 90 degree angle), where [tex]c[/tex] is its hypotenuse, [tex]a[/tex] is the adjacent side to the angle of elevation [tex]\theta[/tex] from the boat to the top of the lighthouse and [tex]b[/tex] is the opposite side to [tex]\theta[/tex].

Knowing this, we will use the tangent trigonometric function to find [tex]\theta[/tex]:

[tex]tan\theta=\frac{oppositeside}{adjacentside}=\frac{b}{a}[/tex]   (1)

[tex]tan\theta=\frac{34m}{122m}[/tex]   (2)

[tex]tan\theta=0.278[/tex]   (3)

[tex]\theta={tan}^{-1} (0.278)[/tex]   (4)

Finally:

[tex]\theta=15.572\°[/tex]  

Answer:

16

Step-by-step explanation:

A boat is 122 meters from the base of a lighthouse that is 34 meters above sea level. What is the angle of elevation from the boat to the top of the lighthouse? Round to the nearest degree.