i need help on this. (the middle one)

Answer:

Step-by-step explanation:

|2+8i|=√(2²+8²)=√(4+64)=√68=2√17

Answer:

2[tex]\sqrt{17\\[/tex]

Step-by-step explanation:

Answer:

Multiply 20 x 0.75 = 15

Step-by-step explanation:

Answer:[tex]c=60+0.05d[/tex]

Step-by-step explanation:

Given

Company charges [tex]\$60[/tex]  for  [tex]1\ GB[/tex] data

and charges [tex]\$0.05/MB[/tex]

If c is the total cost and d represent no of additional megabyte then

Cost is given by the sum of fixed price + additional data charge

[tex]c=60+0.05\times d[/tex]

Therefore final charge is given by

[tex]c=60+0.05d[/tex]

Answer:

$22.5

Step-by-step explanation:

Jim gets 9*2.5= $22.5

$50/20=2.5

2.5*4=10

2.5*7=17.5

2.5*9=22.5

Jim gets $22.50

Answer:

both statements are fine

Step-by-step explanation:

To find the price of a product after decreasing it, they can be done in the two ways that the statement tells us,

First, calculate that% that was decreased and then subtract it from the original price or simply multiply that original price by the percentage in which the new price would remain.

For example:

let "x" be the original price

in the first case it would be:

0.2 * x and then subtract from x, i.e .:

x - 0.2 * x

in the second case it is:

1 - 0.2 = 0.8

that is, the new price would be 0.8 * x

Answer:

336

Step-by-step explanation:

To define whether we use permutations or combinations we must define whether or not the order in which we arrange the results matters. If the order matters we use permutations and if the order doesn't matter we use combinations.

In this case, since we are talking about the first places in a competition, order definitely does matter, so we use permutations. Also in permutations it must be indicated if repetition is allowed, in this case not because the same person cannot be in more than one place.

We use the following formula:

[tex]P=\frac{n!}{(n-r)!}[/tex]

where in this case n is the numer of swimmers and r is the number of places we are considering (1st 2nd and 3rd), which is 3 places.

n = 8

and

r = 3

thus the number of permutations is given bt:

[tex]P=\frac{8!}{(8-3)!}\\ \\P=\frac{8!}{5!} \\\\P=\frac{8*7*6*5*4*3*2*1}{5*4*3*2*1}\\ \\P=8*7*6\\P=336[/tex]

the answer is that there are 336 ways in which the swimmers can finish in first second and third place

Answer: The equation that represents the graph is y=4x.

Step-by-step explanation: If you plug in just one coordinate in each equation, you will find that these are the following outcomes no matter which coordinate you pick(but I'm picking (2,8) for your view):

y=x   ,    8=2

y=x   ,    8=2

y=2x    ,     8=4

y=4x   ,   8=8(ONLY CORRECT STATEMENT)

Answer:

y= 4x

Step-by-step explanation:

Answer:

28.44$

Step-by-step explanation:

The original price of a shirt is A.

This shirt is on sale for 25% => the price of that shirt after being sale:

P1 = A - A x 25% = A - A x (25/100) = A - A x (1/4) = A x (3/4)

This shirt is discounted one more time for 25% => the price of that shirt after being discounted second time.

P2 = P1 - P1 x 25% = P1 - P1 x (25/100) = P1 - P1 x (1/4) = P1 x (3/4) = A x (3/4)^2

P2 is given to be equal to 16$, then there is an expression:

P2 = 16

or

A x (3/4)^2 = 16

=> A x (9/16) = 16

=> A = 16 x (16/9) = 28.44$

Hope this helps!

Answer:

1/3 kg.

Step-by-step explanation:

The ratio of the amount of carrots the elephant eats to the amount of carrots the rabbit eats in the same length of time is 365:1.

So if the total they both eat is 122 kg in one day, the rabbit eats 122 * 1/ 366

= 1/3 of a kg,

Answer: 80 cm^3.

Step-by-step explanation: V = Bh  V = 8 cm ⋅ 10 cm  V = 80 cm^3.

Answer:section 1 you choose c)rhombus

And the last one is X

Step-by-step explanation:sorry i can't explain but we literally got the same thing to do and i passed but what i tell you is correct

Answer:

No because it doesn't show the angle?

Step-by-step explanation:

Answer:

20

Step-by-step explanation:

First, let's find how much she spent on the expensive calculators

40 times $16400= $656,000

Now, lets find how much money she had for the cheap calculators.

$774,000- $656,000=$118000

Now that we have her budget (money remaining) for the cheaper calculators, lets divide that by the price for each individual calculator.

$118000/$5900=20

If you like my answer, please mark me as a brainliest! (I am new to this community.)

Answer:

8

Step-by-step explanation:

7 jars will be completely filled with mung beans

and then 7 × 480 = 3.360 g and 3.800 - 3,360 = 440 g will be left so we need another jar

in total we need 8 jars

Answer:

Hope this is correct

Answer:

219362.5

Step-by-step explanation:

219362.5 because 190750÷10=19075

19075÷2= 9537.50

19075+9537.50=28612.50

219362.5+28612.50=219362.5

Answer:D  a circle   because a sphere is a circular figure

Step-by-step explanation:

Answer:

i think its D

Step-by-step explanation:

Answer:

Step-by-step explanation:

1,5,11,19,29

the series of numbers :

A 2-A 1 = 5–1=4

A 3-A 2 = 11–5=6

A 4-A 3 =19–11=8   the third term is 8

A 5-A 4= 29-19= 10  the forth term is 10  

nth term  is 4+(n-1)2.

Answer:

161.28km

Step-by-step explanation:

Total Laps are      61 Laps

Covered laps are 29 Laps

To be covered is 32 Laps

Each Lap is 5.04 km

Total to be covered is 5.04 x 32 = 161.28 km

Therefore, he was 161.28km away from the finish line.

Answer:

x =8.34654305

Step-by-step explanation:

Since this is a right triangle, we can use trig functions

cos theta = adjacent / hypotenuse

cos 33 = 7/x

Switching places with the x and the 33

x = 7/ cos 33

x =8.34654305

Answer:

↓ Look below ↓

Step-by-step explanation:

You are given the adjacent side and need to find the hypotenuse. You can use cos to figure this out.

[tex]cos33 = \frac{7}{x}[/tex]

→To get rid of the x in the denominator, multiply everything by x:

[tex]x(cos33 = \frac{7}{x})[/tex]

[tex]xcos33 = 7[/tex]

→Divide both sides by cos33:

x = 8.346

→If it is round to nearest tenth:

x = 8.3

→If it is round to nearest hundredth:

x = 8.35

Answer:

5600 dollars

Step-by-step explanation:

The first thing we must do is calculate the area of the rectangle since the value is given per unit area.

They give it per square centimeter, therefore we must pass the measurements from meters to centimeters, knowing that 1 meter is 100 centimeters:

4m * 100cm / 1m = 400cm

5m * 100cm / 1m = 500cm

Now the area would be:

A = 400 * 500 = 20000

20000 cm ^ 2 would be the area of the rectangular wall, we calculate the value like this:

20000 * 0.28 = 5600

In other words, it has a value of 5600 dollars.

Answer:

A) 26°

Step-by-step explanation:

In quad ABCD

C = 90°

B = 2y

A = 180 - 68

D= 180 - (y+48)

In a quad sum of all angles = 360°

therefore,

A + B + C + D = 360°

90 + 2y + 360 - 68 - y - 48 = 360

90-116+y = 0

y = 26°

Answer:

The question is asking to complete the passage about the sum of angle of the exterior angles of an n-gon, one at each vertex, and i would say that it should be 360 degree.

Step-by-step explanation:

Answer: 135983 pages

Step-by-step explanation:

1 book = 421 pages

323 books = 135983 ( 421 x 323)

Mark me as the brainiest answer

Answer:

79,213,229 ft3

Step-by-step explanation:

The volume of a pyramid is given by the following formula:

Volume = (1/3) * B * h

Where B is the base area and h is the height.

The side of the base is 754 feet, so the base area is:

B = 754^2 = 568516 ft2

Then, the volume of the pyramid is:

Volume = (1/3) * 568516 * 418 = 79213229.33 ft3

Rounding to the nearest cubic foot, we have:

Volume = 79,213,229 ft3

Answer:

Step-by-step explanation:

First of all, you have a typo. But that's ok, we can work around it. The equation NOT yet in standard form for an ellipse should be:

[tex]2x^2+8y^2=16[/tex]

Putting it into standard form requires that the right side of the equation equals 1. That means that we need to divide everything by 16 to accomplish that. When we do that, we will get the standard form:

[tex]\frac{x^2}{8}+\frac{y^2}{2}=1[/tex]

The general form is either

[tex]\frac{(x-h)^2}{a^2}+\frac{(y-k)^2}{b^2}=1[/tex] or

[tex]\frac{(x-h)^2}{b^2}+\frac{(y-k)^2}{a^2}=1[/tex]

where a is ALWAYS bigger than b. So if the bigger denominator is under the x numerator, this is an ellipse that is elongated horizontally. If the larger denominator is under the y numerator, then this is an ellipse that is elongated vertically. As you can see from our standard ellipse equation, the 8 is under the x numerator, so this is a horizontally elongated ellipse.

If [tex]a^2=8,[/tex] then [tex]a=\sqrt{8}[/tex] which is approximately 2.83 units.

If [tex]b^2=2,[/tex] then [tex]b=\sqrt{2}[/tex] which is approximately 1.41 units.

Since the ellipse is elongated horizontally, the a value starts at the center of the ellipse and goes 2.83 units to the right and left of the center; the b value starts at the center of the ellipse and goes 1.41 units both up and down from the center. But what's the center?

In the standard form above involving the h and the k in the numerators, the h and k indicate the coordinates of the center. h is like the x coordinate and k is like the y coordinate. Since our ellipse does not have [tex]c^2=8-2[/tex]a constant in a set of parenthesis for either the x or the y term, the center is at (0, 0). From the center then, we go go both right and left to (2.83, 0) and (-2.83, 0) for the vertices of the ellipse. The co-vertices would be (0, 1.41) and (0, -1.41).

The foci have the formula (h + c, k) for the focal point to the right of the center and (h - c, k) for the focal point to the left of the center. But how do we find c?

[tex]c^2=a^2-b^2[/tex]

We already know that [tex]a^2=8[/tex] and [tex]b^2=2,[/tex] so

[tex]c^2=8-2[/tex] and

[tex]c=\sqrt{6}[/tex]

That means that the foci have the coordinates [tex](\sqrt{6},0)[/tex] and [tex](-\sqrt{6},0)[/tex]

and you're done!!

Answer:

c) Equation of the circle

  [tex]\sqrt{(x+7)^2+(y-2)^2}=5[/tex]

Step-by-step explanation:

Given center of the circle C(-7,2) and containing the Point P(-3,5)

C P = r

C P  = [tex]\sqrt{(x_{2} -x_{1})^2+(y_{2} -y_{1} })^2 }[/tex]

C P  = [tex]\sqrt{(-3 -(-7))^2+(5 -2})^2 }[/tex]

C P = [tex]\sqrt{16+9} = 5[/tex]

The radius r = 5

The equation of the circle C(-7,2) and radius =5

[tex](x-h)^2+(y-k)^2 = (r)^2[/tex]

[tex](x-(-7))^2+(y-2)^2 = 25[/tex]