I need help with this practice problem solving The subject, I believe, is complex numbers and vectors

Answer: [tex]15x + 10[/tex]

Step-by-step explanation:

[tex]7x + 4 + 8x + 6[/tex]

First you have to combine like terms. You combine like terms by adding them so u would add 7x and 8x and get 15x. Then u would add 4 and 6 and get 10.

[tex]15x + 10[/tex]

15x + 10 would be your final answer in simplest form.

Given the triangle DEF.

Angle E = 71.2˚

e = 29.5 cm

f = 30.3 cm

We are to solve for each triangle.

Using laws of sine:

a = b = c

sinA SinB SinC

In this case we will have:

e = f

SinE SinF

29.5 = 30.3

sin 71.2˚ sinF

cross multiply

sinF(29.5) = sin 71.2˚(30.3)

sinF = sin 71.2˚(30.3)

sin 29.5

sinF = 0.9466 * 30.3

0.4924

sinF = 58.2524

Answer:

a) -15 (b)25/2 (c)-31.2 (d)15

Step-by-step explanation:

(a)f(-24)=5/6×24+15

-15

(b)f(9)=5/6×9+15

25/2

(c)f(x)=5/6x+15

5/6x+15=-11

5x+90=-66

5x=-66-90

5x=-156

5x/5=-156/5

x=-31.2

(d)f(0)=5/6×0+15

0+15

15

Answer:

The probability of selecting a small or white marble is 10/13

Step-by-step explanation:

The total number of marbles is 15 + 11 = 26 marbles

The probability that we want to calculate is if the marble selected is small or white.

So we need to find the number of small marbles as well as the number of white marbles

We can construct a table to see the distribution of the marbles. Please check the attachment for this.

From the table , we can see that there are 11 small marbles and a total of 9 white marbles

The probability of selecting a white marble is;

number of white marbles/total number of marbles = 9/26

The probability of selecting a small marble will be ;

number of small marbles/total number of marbles = 11/26

In probability, whenever we have or, we tend to add

So therefore, the probability of selecting a white or small marble = Probability of selecting a white marble + Probability of selecting a small marble

Mathematically, that would be 9/26 + 11/26 = 20/26

So the probability is 10/13

Given -

Equations:

y = -x² - 4x -3 and y = 2x + 5

To Find -

Next step =?

Step-by-Step Explanation -

We know first step:

-x² - 4x - 3= 2x + 5

-x² - 4x - 3 - 2x - 5 = 0

-x² - 6x - 8 = 0

-(x² + 6x + 8) = 0

x² + 6x + 8 = 0

x² + 2x + 4x + 8 = 0

x(x+2) +4(x +2) = 0

(x+4)(x+2) = 0

So,

x = -4 or x = -2

So,

The next step is to combine like terms onto one side of the equation.

Final Answer -

Option (d)

Combine like terms onto one side of the equation

The refrigerator is to be set at 5 degrees celsius for the cheese to keep for 5 days.

Since we are given the relation for the exponential function

H(T) = 130 (1/2) ^(T/43.3), where H(T) is the  number of hours

since we are asked for a cheese to keep for  5 days, so

H(T)=  5 * 24 = 120 hours

so the equation we will have

=>120 =130 (1/2) ^(T/43.3)

we multiply both sides by 120

=> 12/13=  (1/2) ^(T/43.3)

taking logarithms on both sides, we get

=> ln (12/13) = (T/43.3) ln(1/2)

=>43.3 ln (12/13) = T ln (1/2)

dividing both sides by ln (1/2), we get

=> T = 43.3  ln (12/13) / ln (1/2)

=> T=  5.0016

=> T = 5.0 celsius  

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The length of time that a particular type of blue cheese will keep in the refrigerator can be modeled by the exponential function H(T) = 130 (1/2) ^(T/43.3) where H(T) represents the number of hours after the cheese is put in the refrigerator and T represents the temperature of the refrigerator in degrees Celsius. If you want the cheese to keep for 5 days, at what temperature should the refrigerator be set ; round your answer to the nearest tenth of a degree.

Data:

Estimate: E= 475 songs

Actual amount: A=380

To find the percent of error you use the next formula:

Let's use a rule of three to solve this:

This way,

The crew will take 36 hours to repave the road

A hypothesis can be seen as an assumption about something, If the hypothesis is wrong, you have information about that something, and you can be sure that the behavior you assumed is never going to happen. In conclusion, you also learn from the mistakes made

Explanation:

The volume formula is:

We know that the radius is r = 5 and the volume is V = 50pi. We have to replace these values into the formula above and solve for h:

Answer:

h = 2

Answer:

So,

let the amount of each transaction be x.

3x= 115.25+77.73

x= 192.98÷

x= 64.327

each transaction was of 64.327

Step-by-step explanation:

since the amount left is -77.73 then three equal transaction will also include 115.25+77.73= 1 92.98

192.98 was the total amount used

To answer this question we will use the following diagram as a reference:

Notice that the perimeter of the given figure is the sum of 2 times the perimeter of the semicircles and 48m, the perimeter of each semicircle is:

Therefore the perimeter of the given figure is:

Answer: 85.68m.

Answer: -6/5=2/9

Step-by-step explanation:

Answer: 3

Step-by-step explanation:

if x = 1 then 2(1) +1 is 2+1 which is 3

f(1) means that in the place of x you plug in 1 and simplify.

[tex]f(1) = 2(1) + 1 \\ f(1) = 2 + 1 \\ f(1) = 3[/tex]

ATTACHED IS THE SOLUTION

Children's academic success, literacy, numeracy, and scientific knowledge are all directly impacted by their schooling. A child's education in school helps them learn all the fundamentals that will benefit them in the future.

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Given:

Area of base of the prism, B = 96 square centimeters

Height of prism, H = 9 centimeters

Let's find the volume of the prism.

To find the volume of the prism, apply the formula below:

Where:

V is the volume in cubic units

B is the area of the base = 96 square centimeters

H is the height = 9 centimeters

Hence, we have:

Therefore, the volume of the prism is 864 cubic centimeters

ANSWER:

Answer:99cm.l

Step-by-step explanation:100-1

100-1=99

So then the answer is 99, because 99+1 is also equal to 100.

And if you subtract 1 from 100, you get 99.

Answer: 99cm

Step-by-step explanation:

1cm + x = 100cm

100cm - 1cm = x
Which means,

99cm is the correct answer.

x² + 3 / (x-1)(x-3) is simplest form of the given expression

Given: x-3/x-1 + 6/x-3

First, find the LCM of x-1 and x-3. The LCM is c

(x-3)(x-3) + 6(x-1) / (x-1)(x-3)            

Remove the bracket of the numerator

x² - 6x + 9 + 6x - 6 / (x-1)(x-3)        

Add and subtract like terms

x² + 3 / (x-1)(x-3)

Therefore, the expression has the simplest form of x² + 3 / (x-1)(x-3). This shows the concept of expression.

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The average rate of change of the function from x = 4 to x = 7 is: -1/3.

The formula used to estimate the average rate of change of a function is given as:

f(b) - f(a) / b - a.

Given the function as shown in the diagram below, we are required to find the average rate of change of the function within the interval, x = 4 to x = 7, therefore:

a = 4

b = 7

f(a) = f(4) = 4

f(b) = f(7) = 3

To find the average rate of change of the given function for the interval of x = 4 to 7, substitute the above stated values into the formula for the average rate of change, f(b) - f(a) / b - a:

Average rate of change = 3 - 4 / 7 - 4

Average rate of change = -1/3

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Let x = volume of 20% solution=0.2

Let y = volume of 30% solution=0.3

Equation of total volume:

x + y = 90

Equation of amount of acid:

Substitute into the second equation

Therefore 45 liters of 20% solution and 45 liters of 30% solution

Hence the volume of 20% acid = 45 litres

the volume of 30% acid = 45 litres

Answer:

Step-by-step explanation:

Comment

Well my response is, I know how it is done and most of the time I get it right, but mistakes make me give myself about a 3.4.

I hope this answers your question. It will likely be taken down.

Answer:

43

Step-by-step explanation:

The value of y varies directly with x. When y = 21, x = 3. What is the value of y when x is 14.

when y = 21 and x = 3 the ratio of y to x is 21 to 3 or (reduced) 3 y to 1 x

This means y is three times the size of x.

When x = 14 then y = 14 × 3 = 42

Answer:

(-1,-6) --> (1,-6) --> (1,6)

(1,6) is E''

The three methods that are generally used to solve f(x) =g(x) are Graphing technology, Tables of values, and Successive approximation.

Determine the exact value of x by replacing the values of x with f(x) and g(x).

The hit-and-trial technique is used in f(x) = g(x) to compute the exact value of x by selecting an interval and then substituting the value of x in that interval.

This is a bit longer and takes more time.

Graph Technique: Create a graph that contains both f(x) and g(x). The values of x given by these two functions are the same.  Some features are difficult to plot, but once plotting is done, the right solution is obtained. The graphics technique is prioritised in determining f(x) = g(x) and x.

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ANSWER:

The ramp does meet federal standards

STEP-BY-STEP EXPLANATION:

The first thing we must do is sketch the situation of the statement in order to better understand it.

Now, we need to convert feet to inches, so they are the same units. We know that 1 foot is equal to 12 inches, so:

1 ft = 12 in

20 ft = 20 ft *12 in/ft = 240 in

Now, we calculate the angle of the ramp by means of the trigonometric sine function that relates the side opposite the angle to the hypotenuse.

Therefore:

The value of the angle is 3.58°, which is less than 5°, which means that it meets federal standards.

Answer:

20 hyenas

Step-by-step explanation:

locate number of lions 28 on the horizontal axis , then go up vertically to meet the line, then cross horizontally to meet the vertical axis at 20

that is 20 hyenas are contained

Given:

The equation above is written in slope intercept form:

y = mx + b

To rewrite in standard form, use the standard form of linear equations below:

Ax + By = C

Thus, we have:

Multiply through by 9 to eliminate the fraction:

Add 2x to both sides:

Therefore, the equation in standard form is:

2x + 9y = 27

ANSWER:

D. 2x + 9y = 27

The profit for te corporation is 235,00 million.

The revenue for the corporation is 6700e million.

To determine th fractio in lowest terms for thr e profit and revenue is

Answer:

136 m

Step-by-step explanation:

Let w = the width of the rectangular field.

Let l = the length of the rectangular field.

The formula for the perimeter P of the rectangular field is:

P = 2w + 2l

Since the length l is 7 m less than 4 times the width w, then we can write the following equation that relates l and w:

l = 4w - 7 m

Since l = 4w - 7 and it's given that perimeter P = 136 m, then we can substitute this information into the perimeter formula as follows:

P = 2w + 2l

136 m = 2w + 2(4w - 7 m)

136 m = 2w + 2(4w) - 2(7 m)

136 m = 2w + 8w - 14 m

136 m + 14m = 10w - 14 m + 14 m

150 m = 10w + 0

10w = 150 m

(10w)/10 = 150 m/10

(10/10)w = 150 m/10

(1)w = 15 m

w = 15 m

Therefore, l = 4w - 7 m

l = 4(15 m) - 7 m

l = 60 m - 7m

l = 53 m

CHECK:

P = 2w + 2l

136 m = 2(15 m) + 2(53 m)

136 m = 30 m + 106 m

136 m = 136 m