Help plz I don’t understand

Answer:

a)ab and yz, ac and xy, bc and xz

b)yz  =   xy  =   xz          30 = 37.5 = 45      3 = 3 = 3      

ab      ac        bc          40     50       60     4    4    4

c)they are similar because all sides break down to ¾  

Step-by-step explanation: this is what i did on my test

Answer:

A) 11.25

Step-by-step explanation:

6x+2x=90

8x=90

x=90÷8

x=11.25

Answer: 9x16

Step-by-step explanation: The correct option is perfect square of 3x4 is 9x16.

Answer:

The 99.5% confidence interval for the mean price for all phones of this type being sold on the Internet in 2013 is between $140.39 and $309.11

Step-by-step explanation:

Sample mean:

Sum of all values divided by the number of values. So

[tex]S_{m} = \frac{249+349+299+249+149+135+199+169}{8} = 224.75[/tex]

Confidence interval:

We have the standard deviation for the population, so the z-distribution is used.

We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:

[tex]\alpha = \frac{1 - 0.995}{2} = 0.0025[/tex]

Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].

That is z with a pvalue of [tex]1 - 0.0025 = 0.9975[/tex], so Z = 2.807.

Now, find the margin of error M as such

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.

[tex]M = 2.807\frac{85}{\sqrt{8}} = 84.36[/tex]

The lower end of the interval is the sample mean subtracted by M. So it is 224.75 - 84.36 = $140.39

The upper end of the interval is the sample mean added to M. So it is 224.75 + 84.36 = $309.11

The 99.5% confidence interval for the mean price for all phones of this type being sold on the Internet in 2013 is between $140.39 and $309.11

Answer:

i dont know have an amazing day

Step-by-step explanation:

be kind ppl

9514 1404 393

Answer:

  see attached

Step-by-step explanation:

12. The first attachment has the rate of change on each interval. (It is listed at the end of the interval.) It is computed by dividing the difference in length by the corresponding difference in months. The units of rate of change are inches per month.

The baby was growing fastest in the first 3 months.

__

13. The first attachment has the rate of change on each interval. It is computed by dividing the difference in height by the corresponding difference in seconds. The units of rate of change are meters per second. A negative number indicates the elevator is going down.

The second attachment shows a graph of the distance versus time.

_____

I find it convenient to let a spreadsheet do repetitive calculations. I can enter the formula once and copy it where needed. I don't have to worry about the accuracy of the arithmetic, and the result can be formatted to suit the problem requirements. (The basics of most spreadsheet programs can be learned in a few minutes.)

Answer:

D. (1,6)

Step-by-step explanation:

Vertical line segment:

A vertical line segment has fixed x coordinate.

In this question:

Vertical line segment that is 4 units long and is connected to (1,2).

The x-coordinate is x = 1.

The y-coordinate can be y = 2 - 4 = -2 or y = 2 + 4 = 6.

(1,6) is one of the options, so the correct answer is given by option D.

Answer:

They're both cool but I personally like the first one better lol

Answer:

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Step-by-step explanation:

a. The interest earned is $307.40.

b. The balance of the account after 4 years is $1982.40.

Simple interest is a type of interest that is calculated only on the principal amount of a loan or investment. It is a fixed percentage of the principal amount that is added to the loan or investment balance over a specified period of time.The formula for simple interest is:

I = P * r * t

In finance, the term "principal" usually refers to the initial amount of money that is borrowed or invested, excluding any interest or other fees that may be added on later.

In the given question,

a. To find the interest earned, we can use the formula:

Interest = Principal x Rate x Time

where Principal is the initial amount of money, Rate is the interest rate, and Time is the duration of the investment. Plugging in the given values, we get:

Interest = $1675 x 0.046 x 4

Interest = $307.40

Therefore, the interest earned is $307.40.

b. To find the balance of the account, we simply add the interest earned to the initial amount:

Balance = Principal + Interest

Balance = $1675 + $307.40

Balance = $1982.40

Therefore, the balance of the account after 4 years is $1982.40.

To know more simple interest, visit:

https://brainly.com/question/30824126

#SPJ1

Answer:

$ 80 xyz

Step-by-step explanation:

..... ......... ..............

Answer:

16.25 mL

Step-by-step explanation:

Since we are mixing from the syrup in the inventory, we can say that the syrup in the inventory must be equal to that in the final solution. Thus, we will use the dilution equation to solve for the Initial volume;

Dilution equation is;

V₁C₁ = V₂C₂

Where;

V₁ is initial volume

C₁ is initial concentration or initial molarity

V₂ is final volume

C₂ is final concentration of final molarity

We are given;

C₁ = 80% = 0.8

C₂ = 60% = 0.6

V₂ = 65 mL

Making V₁ the subject in the dilution equation, we have;

V₁ = (V₂C₂)/C₁

V₁ = (65 × 0.6)/0.8

V₁ = 48.75 mL of inventory syrup

Since we have 48.75 mL of inventory syrup and the dilute solution is 65 ml, then the volume of soda solution required = 65mL - 48.75 mL = 16.25 mL

Answer:

[tex] \displaystyle {9}^{2x - 1} = 2[/tex]

Step-by-step explanation:

we are given a logarithmic equation

[tex] \displaystyle \log_{9}(2) = 2x - 1[/tex]

we want to rewrite it as exponential equation

remember that,

[tex] \displaystyle\log_{a}(b) = c \iff {a}^{c} = b[/tex]

here our a is 9,b is 2 and c is 2x-1

altogether

our exponential equation is

[tex] \displaystyle {9}^{2x - 1} = 2[/tex]

and we're done!

Answer:

the second one

Step-by-step explanation:

the first one has 2 faces maybe 1 long and 1 short

but the 2nd one has 3 faces

looking at it not from the top but sideways

Answer:

(-3,4,-2)

Step-by-step explanation:

Answer:

x=0

Step-by-step explanation:

I'm just borrowing a little amount of points thank you sm

Answer:

y = -3x - 16

Step-by-step explanation:

m = -3 ; (-6 , 2)

Slope point form : y - y1 = m(x -x1)

y - 2 = -3(x - [-6])

y - 2 = -3(x + 6)

y -2 = -3x + 6*(-3)

y - 2 = -3x - 18

    y = -3x - 18 + 2

  y = -3x - 16    

Answer:

(y+1/2  ; y)

Step-by-step explanation:

hello :  all  ordered pair is a solution of the linear equation x=y+1/2;(-5,-2) is :

(y+1/2  ; y)

(-5 ; -2) is not  solution because y = -2  but  -2+1/2 = -3/2 no -5

Answer:

y = 45

Step-by-step explanation:

2y+1+y+112+112=360

3y+225=360

3y=135

y=45

Answer: I put it in my calendar and i got 45 hope this helps

Step-by-step explanation:

pleas make brainly

Answer:

C.

Step-by-step explanation:

Answer:

197 adult tickets and 354 child tickets were sold for the event.

Step-by-step explanation:

Given that the Family Fine Arts Center charges $ 22 per adult and $ 14 per child under 12 years old for its performances, and on a recent weekend evening when 551 people paid admission, the total receipts were $ 9290, to determine how many who paid were children under 12 years old the following calculation must be performed:

22 - 14 = 8

551 x 14 = 7.714

9,290 - 7,714 = 1,576

1,576 / 8 = 197

551 - 197 = 354

197 x 22 + 354 x 14 = X

4.334 + 4.956 = X

Therefore, 197 adult tickets and 354 child tickets were sold for the event.

Answer:

Area of shaded region = 13.07 unit² (Approx.)

Step-by-step explanation:

Given:

Given shaded region is a segment

Radius of circle = 12

Given angle = 60°

Find:

Area of shaded region

Computation:

Area of shaded region = Area of segment

Area of segment = (θ/360)(π)(r²) - (1/2)(sinθ)(r²)

Area of segment = (60/360)(22/7)(12²) - (1/2)(sin60)(12²)

Area of segment = (0.1667)(3.14)(144) - (0.5)(0.866)(144)

Area of segment = (75.42) - (62.35)

Area of segment = 13.07 unit²

Area of shaded region = 13.07 unit² (Approx.)

Answer:

B should be where C is, C is A, and A is B

Answer:

10 and 12

Step-by-step explanation:

the LCM of 10 and 12 is 60

10 and 12 have 2 as the least common factor between them

Answer:

9) 379.94 mm2

10)19.625 ft2

Step-by-step explanation:

a=(pi)r2

a=3.14(11 mm2)

a=3.14(121 mm2)

a=3.14*121 mm2

a=379.94 mm2

a=(pi)r2

a=3.14(2.5 ft2)

a=3.14(6.25 ft2)

a=3.14*6.25ft2

a=19.625 ft2

Answer:

(I don't know where to round the numbers to, so I'll just put the full areas)

The answer to 9. is: 380.132711 mm², and the answer to 10. is: 19.6349541 ft².

Step-by-step explanation:

The formula for the area of a circle is A = πr². (A = area, π = pi, r = radius.) When you substitute the variables in the formula for the values of question #9, you get A = π(11)². (It's 11 because the radius is half of the diameter, which in this case is 22 mm.) And when you substitute the variables for the values of question #10, you get A = π(2.5)². And from there, you just finish the equations. Hope this helps :)

The measure of A is: 78°