Please help word problems challenging for me

Since the angles of elevation of the top of two vertical towers is 45° & 60°, the ratio of the height of the towers is 0.58:1

Since the angles of elevation of the top of two vertical towers as seen from the middle point of the lines joining the foot of the towers are 45° & 60°.

The height of the tower, the line of sight and the ground form a right angled trangle

Let

Using trigonometric ratios, we have that

tanФ = h/d

= h/L/2

= 2h/L

So, h = LtanФ/2

= Ltan45°/2

= L/2 × 1

= L/2

Let

Using trigonometric ratios, we have that

tanФ' = h'/d

= h'/L/2

= 2h'/L

So, h' = LtanФ'/2

= Ltan60°/2

= L/2 × √3

= √3L/2

So, the ratio of the height of the towers is n = h/h'

= L/2 ÷ √3L/2

= 1/√3

= 1/1.732

= 0.577

≅ 0.58

So, the ratio of the height of the towers is 0.58:1

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Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

So given the three bits of information you can conclude a couple of things. The end behavior towards the right should be increasing and since there is only two turning points this means it was previously going down but had a turning point and starting going up, and before that it was going up and then started going down, those will be the two turning points. So on the left side it should be decreasing and the right side it should be increasing. The last peace of information tells you that at the second turning point, should be equal to 250k when it turned back up OR the y-intercept is 250k. Given all this information the answer should be the first graph in the first picture

Answer: D

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

i took the test

The resulting function after all transformations have been carried out is; -7log6(-x) - 2.

The transformations which ensued on the function given are as follows;

On this note, it follows that the resulting function upon all the Transformations is; = -7log6(-x) - 2.

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The length of AB wit the coordinate (-6, 5) and (8,5). is 14 units

A rectangle is a quadrilateral with 4 sides and angles

Taking the length of AB.

Since AB is slant line, the length of AB will be determined using the distance formula as shown;

D = √(-6-8)² +(5-5)

D = √(-14)²

D = AB = 14 units

Hence the length of AB wit the coordinate (-6, 5) and (8,5). is 14 units

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By the corresponding angles theorem,

Thus, triangles AFD, BGD, and CHD are similar by AA.

Answer:

If all of these are parralel and all touching a single line(FD), then they must be the same. Also, they are perpendicular. :/

Step-by-step explanation:

The expression for the total number of services the have to choose from is 6x - 1

From the question, we are to determine the expression for the total number of services

From the given information,

Number of types of massages = 4x + 3

Number of types of manicures = -6x + 5

Number of types of pedicures = 8x - 7

Then,

Total number of services = 4x + 3 + (-6x + 5) + 8x - 7

Total number of services = 4x + 3 - 6x + 5 + 8x - 7

Total number of services = 4x - 6x + 8x - 7 + 3 + 5

Total number of services = 6x - 1

Hence, the expression for the total number of services the have to choose from is 6x - 1

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Answer: the answer is actually 6x+1, not 6x-1

The supply equation of the company's total cost is 0.75x

The question implies that we determine the equation of the company production and categorize the equation as demand or supply

The given parameters are:

The total cost of production is calculated as:

Total Cost = Overalls * Cost price

To determine the equation, we set the number of overalls to x.

So, we have:

Total Cost = x * 0.75

Evaluate

Total Cost = 0.75x

Hence, the equation of the company's total cost is 0.75x

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Step-by-step explanation:

Area of sector = (θ/2) × r2

= (1.75/2) × 2×2

= (0.875) ×4

= 3.5 In2

The production quantity of 40,000 units, it is estimated that 38,000 units will be sold and 2,000 units will be salvaged. For the production quantity of 80,000 units, it is estimated that 64,000 units will be sold and 16,000 units will be salvaged.

Based on the information provided, let's analyze the production quantities of 40,000 units and 80,000 units, considering the assumptions for product sales and salvage.

40,000 unit plan:

Sold: 95% of 40,000 units = 0.95 * 40,000 = 38,000 units

Salvaged: 5% of 40,000 units = 0.05 * 40,000 = 2,000 units

80,000 unit plan:

Sold: 80% of 80,000 units = 0.80 * 80,000 = 64,000 units

Salvaged: 20% of 80,000 units = 0.20 * 80,000 = 16,000 units

Therefore, for the production quantity of 40,000 units, it is estimated that 38,000 units will be sold and 2,000 units will be salvaged.

For the production quantity of 80,000 units, it is estimated that 64,000 units will be sold and 16,000 units will be salvaged.

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Answer:

954 passengers

Step-by-step explanation:

We can use ratios to solve

15 buses                   18 buses

--------------             = ---------------

795 passengers      x passengers

Using cross products

15 * x = 18 * 795

15x = 14310

Divide each side by 15

15x/15 = 14310 /15

x =954

18 buses can carry 954 passengers

Using the spread sheet we can easily get the answers:

The statistical section helps find answers by putting the accurate formula or the graphing calculator.

ANOVA      

Source of Variation SS   df     MS         F        P-value      F crit

Between Groups 1471.33    2 735.68 11.59   0.001072834 3.7389

Within Groups 888.55 14 63.4677      

Total              2359.882 16    

The APA style refers to Times New Roman Font 12 pts.

The effect size of the result is 0.6233 medium

Part A

ANOVA      

Source of Variation SS   df     MS F        P-value F crit

Between Groups 1471.33    2 735.68 11.59   0.001072834 3.7389

Within Groups 888.55 14 63.4677      

Total        2359.882 16    

1) The null and alternative hypotheses are

H0: u1=u2=u3

Ha: Not all means are equal

2) The significance level is alpha = 0.05

3) The test statistic F = sb²/sw²

Which if H0 is true has an F distribution with ν1=2 and  v2= 14 degrees of freedom.

The computations are

Anova: Single Factor            

Groups Count Sum Average            Variance  

Column 1      6          373    62.16666667      78.96666667  

Column 2 4 324              81             60.66666667  

Column 3 7 402        57.42857143     51.95238095  

ANOVA      

Source of Variation SS   df     MS F        P-value F crit

Between Groups 1471.33    2 735.68 11.59   0.001072834 3.7389

Within Groups 888.55 14 63.46768707      

Total        2359.882353 16  

5) The critical region is F ≥ F(0.05)(2,14) = 3.74

6) Conclusion:

Since the computed value F= 3.73 does not fall in the critical region F> 3.74 so we accept H0 and conclude that there is no significant difference in the three means.

Part D: The effect size of the result is 0.6233 medium and  calculated by

η²= ss between/ ss between + ss error

η²= 1471/1471+889

η²= 0.6233

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The y-intercept given line equation is 5.9.

Given that, the line of the equation is y-2.1x+5.9.

We need to find the y-intercept of the line.

The standard form of slope-intercept form is y=mx+c.

Where, m=slope and c=y-intercept.

Using the slope-intercept form to find the y-intercept, we get c=5.9.

Hence, the y-intercept given line equation is 5.9.

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Hello :

    3/8 = x/(15 + x)

⇔ 3(15 + x)/8 = x

⇔ (45 + 3x)/8 = x

⇔ 45 + 3x = 8x

⇔ 8x - 3x = 45

⇔ 5x = 45

⇔ x = 45/5

⇔ x = 9

Answer:

Second one i believe

Step-by-step explanation:

Well u know the sides arent given

Answer:

6

Step-by-step explanation:

Answer:

Step-by-step explanation:

Proportional relationship is:

We have the ordered pair (1, 5/4), which represents:

When x = 1, the y- coordinate is equal to the coefficient of proportionality.

In this case it represents a score for one correct answer.

Answer: b. f(x) is an even function for all even values of m.

Step-by-step explanation:

[tex]f(x)=(x^m +9)^2[/tex]

If m is even, then [tex](-x)^m=x^m[/tex].

This means that [tex]f(-x)=(x^m+9)^2 \implies f(-x)=f(x)[/tex]

Thus, b is the correct answer.

Answer:

Your answer is 2x³ + 7x²y + y²- x²

Step-by-step explanation:

(a) ( 2x³ + 4x²y + 5xy² - 3y² ) - ( x² - 3x²y +5xy² - 2y² ) ​

= 2x³  + 4x²y  +  5xy² - 3y² - x² + 3x²y  - 5xy² + 2y²

= 2x³ + 4x²y + 3x²y + 5xy² - 5xy² + 3y² + 2y² -  x²

= 2x³ + 7x²y + y²- x²  ans.

Hope its helpful!

Please mark me as brainlist.

Step-by-step explanation:

(a) ( 2x³ + 4x²y + 5xy² - 3y² ) - ( x² - 3x²y +5xy² - 2y² ) ​

= 2x³  + 4x²y  +  5xy² - 3y² - x² + 3x²y  - 5xy² + 2y²

= 2x³ + 4x²y + 3x²y + 5xy² - 5xy² + 3y² + 2y² -  x²

= 2x³ + 7x²y + y²- x²  ans.

Step-by-step explanation:

Evalate the expression when m=4 and m=6

Step-by-step Expression;

- Given; The function f(x) on the interval [ 5,15]

- To find the average rate of change of the function f(x)=?

x = 5 , y = 15,

I can't solve it anymore,please can you solving?

The intervals of the function on the graph are:

The function is given as:

f(x) = -2(x-3)² + 2

See attachment for the graph.

From the graph, we have;

Domain = (-∝, ∝)

Because it takes all real values as its input

Range = (-∝, 2]

Because it has a vertex of (3, 2) and the vertex is a maximum

Also, it increases on the interval (-∝, 3] and decreases on the interval [3, ∝)

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Answer:

1, 1.5

Step-by-step explanation:

Use the rational roots theorem. Factor out until you get the maximum simplification.

0.375(x−1)(2x−3)(19x2+15x+9)

However, if you wanted to solve this equation for r, you will get 1, 1.5 using the quartic formula.

Answer:

3200

Step-by-step explanation:

0.13x    + 0.04*(6100-x) = 532    dollars.

  0.13x + 0.04*6100 - 0.04x = 532

 (0.13 - 0.04)x = 532 - 0.04*6100

 x = 532 - 0.04 - 6100/0.13-0.04 = 3200

The couple invested:

to earn $477 as the total interest for the first year.

The interest over an investment is the additional amount that a person receives on investing his/her money in the cause.

In the question, we are informed that in investing $6,150 of a couple's money, a financial planner put some of it into a savings account paying 6% annual simple interest. The rest was invested in a riskier mini-mall development plan paying 9% annual simple interest. The combined interest earned for the first year was $477.

We are asked to find the amount invested in each rate.

We assume the amount invested in savings account to be $x.

Therefore, the amount invested in development plan is $(6150 - x).

Simple interest on a sum of money (P), at a rate (r) over a time period (t), is given as S.I. = (Prt)/100.

We calculate the interest earned in both investments:-

Investment in savings account:

Amount invested (P) = $x.

Rate of interest (r) = 6%.

Time for investment (t) = 1 year.

Therefore, interest received = (Prt)/100 = $(x*6*1)/100 = $ (6x)/100

Investment in development plan:

Amount invested (P) = $(6150 - x).

Rate of interest (r) = 9%.

Time for investment (t) = 1 year.

Therefore, interest received = (Prt)/100 = $((6150 - x)*9*1)/100 = $ {9(6150 - x)}/100.

We know that the total interest received is $477.

Thus on adding Interests from both the investments, we can write an equation:

(6x)/100 + {9(6150 - x)}/100 = 477

or, 6x + 55350 - 9x = 47700,

or, 55350 - 47700 = 3x,

or, 3x = 7650,

or x = 7650/3 = 2550.

Thus, the investments in:

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The balance, in dollars, (future value) when the pension plan earns 6% compounded monthly is $372,134.19.

The future value refers to the compounded future value of an asset, for example, a pension plan, based on a growth rate of interest for a future period.

The future value can be determined with the FV formula, table, or using an online finance calculator as follows:

N (# of periods) = 528 months (68 - 24 x 12 months)

I/Y (Interest per year) = 6%

PV (Present Value) = $0

PMT (Periodic Payment) = $144

Results:

FV = $372,134.19

Sum of all periodic payments = $76,032 ($144 x 528)

Total Interest = $296,102.19

Thus, the balance, in dollars, (future value) when the pension plan earns 6% compounded monthly is $372,134.19.

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Answer:

X and Y intercept

Step-by-step explanation:

X and Y intercept is much easier as the equation is linear it is easy to find the intercepts

Answer: a = 2√3

First method (Pythagoras theorem):

a² + b² = c²

a² + 2² = 4²

a² = 16 - 4

a = √12

a = 2√3

Second method (sine rule):

opposite/hypotenuse = sin(x)

a/4 = sin(60)

a = 4sin(60)

a = 2√3

Third method (tan rule):

opposite/adjacent = tan(x)

a/2 = tan(60)

a = 2tan(60)

a = 2√3

Answer:

2√3

Step-by-step explanation:

From inspection of the given triangle:

As we cannot be sure that ΔABC is a right triangle since it is not marked as such, use the cosine rule to find the exact length of side a.

Cosine Rule

[tex]a^2=b^2+c^2-2bc \cos A[/tex]

where a, b and c are the sides and A is the angle opposite side a

Given:

Substitute the given values into the formula and solve for a:

[tex]\implies a^2=2^2+4^2-2(2)(4) \cos 60^{\circ}[/tex]

[tex]\implies a^2=4+16-16\left(\dfrac{1}{2}\right)[/tex]

[tex]\implies a^2=20-8[/tex]

[tex]\implies a^2=12[/tex]

[tex]\implies a=\sqrt{12}[/tex]

[tex]\implies a=\sqrt{4 \cdot 3}[/tex]

[tex]\implies a=\sqrt{4}{\sqrt{3}[/tex]

[tex]\implies a=2\sqrt{3}[/tex]

Therefore, the exact length of side a is 2√3.

To find out if ΔABC is a right triangle, use Pythagoras Theorem to solve for side a:

[tex]\implies a^2+b^2=c^2[/tex]

[tex]\implies a^2+2^2=4^2[/tex]

[tex]\implies a^2+4=16[/tex]

[tex]\implies a^2=12[/tex]

[tex]\implies a=\sqrt{12}[/tex]

[tex]\implies a=2\sqrt{3}[/tex]

As the measure of side a is the same as the solution found when using the cosine rule, we can conclude that ΔABC is a right triangle.

The trigonometric identity 4cos(-5B) sin3B is equivalent to 2[sin(8B) - sin(2B)]

Since we have 4cos(-5B) sin3B

Using the trigonometric identity

sin(x + y) - sin(x - y) = 2cosxsiny

So, cosxsiny = [sin(x + y) - sin(x - y)]/2

Since we have 4cos(-5B) sin3B, comparing cos(-5B) sin3B with cosxsiny, we have

x = -5B and y = 3B

So, we have cos(-5B)sin3B = [sin(-5B + 3B) - sin(-5B - 3B)]/2

= [sin(-2B) - sin(-8B)]/2

=  [-sin(2B) - {-sin(8B)}]/2 [since sin(-2B) = -sin(2B)]

=  [-sin(2B) + sin(8B)]/2

= [sin(8B) - sin(2B)]/2

So, 4cos(-5B)sin3B = 4 × [sin(8B) - sin(2B)]/2

= 2[sin(8B) - sin(2B)]

So, the trigonometric identity 4cos(-5B) sin3B is equivalent to 2[sin(8B) - sin(2B)]

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