find the values of a and b (special right triangles)

Answer:

2 hours

Step-by-step explanation:

Mary=x

Sam=2x

Mary+Sam=3x=6hours

x=2hours

Answer:

[tex]2(\frac{1}{2} *20*50)+2(\frac{1}{2} *20*10)[/tex]

Step-by-step explanation:

The formula for the area of a triangle is [tex]\frac{1}{2} *b*h[/tex]

The triangles that can be made is the triangle that has legs 20 and 50 and the triangle that has legs 20 and 10.

Since there are 2 of each triangles, we get:

[tex]2(\frac{1}{2} *20*50)+2(\frac{1}{2} *20*10)[/tex]

The answer that fits is the first option.

Answer:

The table shows the heights of the winners and runner-ups of 8 presidential elections. Find the line of regression that predicts the runner-up's height given the winner's height. Determine if the regression line is a good predictor of heights for the winners and runner-ups of presidential elections.

Winner: 69.5; 73; 73; 74; 74.5; 74.5; 71; 71

Runner-Up: 72; 69.5; 70; 68; 74; 74; 73; 76

a. y = 95.4 - 0.321x; no, because the r-value is low.***

b. y = -0.321 + 95.4x; no, because the r-value is low.

The regression line is NOT a good predictor of heights for the winners and runner-ups of presidential elections because the r-value is low

Given that:

The data given for the winners are:

69.5; 73; 73; 74; 74.5; 74.5; 71; 71

The runners up are:

72; 69.5; 70; 68; 74; 74; 73; 76

With this, we can see that a. y = 95.4 - 0.321x; no, because the r-value is low.

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Answer:

a. The probability that a customer purchase none of these items is 0.49

b. The probability that a customer purchase exactly 1 of these items would be of 0.28

Step-by-step explanation:

a. In order to calculate the probability that a customer purchase none of these items we would have to make the following:

let A represents suit

B represents shirt

C represents tie

P(A) = 0.22

P(B) = 0.30

P(C) = 0.28

P(A∩B) = 0.11

P(C∩B) = 0.10

P(A∩C) = 0.14

P(A∩B∩C) = 0.06

Therefore, the probability that a customer purchase none of these items we would have to calculate the following:

1 - P(A∪B∪C)

P(A∪B∪C) =P(A) + P(B) + P(C) − P(A ∩ B) − P(A ∩ C) − P(B ∩ C) + P(A ∩ B ∩ C)

= 0.22+0.28+0.30-0.11-0.10-0.14+0.06

= 0.51

Hence, 1 - P(A∪B∪C) = 1-0.51 = 0.49

The probability that a customer purchase none of these items is 0.49

b.To calculate the probability that a customer purchase exactly 1 of these items we would have to make the following calculation:

= P(A∪B∪C) - ( P(A∩B) +P(C∩B) +P(A∩C) - 2  P(A ∩ B ∩ C))

=0.51 -0.23 = 0.28

The probability that a customer purchase exactly 1 of these items would be of 0.28

Answer:

Step-by-step explanation:

In this problem, we have the following linear equations:

y=3x+5

y=ax+b

We know that a linear equation is an equation for a line. In a system of linear equations, two or more equations work together.

1.  What values for a and b make the system inconsistent?

A system is inconsistent if and only if the lines are parallel in which case the system has no solution. This is illustrated in the first Figure bellow. Two lines are parallel if they share the same slope. So, the system is inconsistent for:

a=3

for any value of b

2. What values for a and b make the system consistent and dependent?

A system is consistent if and only if the lines are the same in which case the system has infinitely many solutions. This is illustrated in the second Figure bellow. So, the system is consistent and dependent for:

a=3 and b=5

Answer:

When a = 3 and b ≠ 5, the system will be inconsistent because the lines will be parallel. When a = 3 and b = 5, the system will be consistent and dependent because they represent the same line.

Step-by-step explanation:

Answer:

y = 4x+ 3

Step-by-step explanation:

The slope intercept form of a line is

y = mx+b  where m is the slope and b is the y intercept

y = 4x+ 3

Answer:

~9071

Step-by-step explanation:

A culture started with 5,000 bacteria.

After 7  hours, it grew to 6,500 bacteria.

=> The number of bacteria that grew after 7 hours: 6500 - 5000 = 1500

=> The number of bacteria that will grow after 19 hours: 1500 x 19/7 = ~4071

=> The number of bacteria that will present after 19 hours:

N  = 5000 + 4071 = ~9071

Hope this helps!

Answer:

10,200

Step-by-step explanation:

Answer:

9 is the correct answer to the given question .

Step-by-step explanation:

AS mention  in the question the random variable x is the number of vehicles that passing through the intersection in the 30-minute .So we concluded that it is normal distribution because in the normal distribution the variable values are divided .

In the Normal distribution  

[tex]Mean \ number\ =\ Expected\ value\ \\Here Mean number\ =\ 9[/tex]

Therefore the Expected value =9.

Answer:

b

Step-by-step explanation:

In a parralel graph, the slopes would always be the same. The intercept in the answer is 2, showing that the coordinate points are (0,2)

Hope this helps!:)

Answer:

B) y = 2x + 2

Step-by-step explanation:

Firstly, you have to know that parallel lines have congruent slopes. That means that the slope of this line will be 2.

Next, make a point slope form of the equation:

y - y1 = m(x - x1)

y - 2 = 2(x - 0)

y - 2 = 2x - 0

Now, we can make it into slope intercept form.

y - 2 = 2x

y = 2x + 2

Hope this helps :)

Answer:

a= [tex]\frac{14}{3}[/tex]

a≈4.6

Step-by-step explanation:

a+5- [tex]\frac{2}{3}[/tex] =9

a+ [tex]\frac{15}{3} -\frac{2}{3}[/tex] =9

a+ [tex]\frac{13}{3}[/tex] =9

Subtract [tex]\frac{13}{3}[/tex] from both sides

a=[tex]\frac{14}{3}[/tex]

a≈4.6

Answer:

a

Step-by-step explanation:

Answer:

Asda offers a better value

Step-by-step explanation:

1.14 / 2 = 0.57

2.80 / 5 = 0.56

Answer:

96

Step-by-step explanation:

Exterior angles add up to 360

360 - 134-130 = 96

x = 96

answer: 15

----------------

Answer:

15

Step-by-step explanation:

60 divide by4

Answer:

Hope this helps mark as brainliest if helpd thanks!

Step-by-step explanation:

Possible outcomes will be:

chicken, pineapple

chicken, olives

chicken, mushrooms

chicken, beef

pineapple, olives

pineapple, mushrooms

pineapple, beef

olives, mushrooms

olives, beef

mushrooms, beef

Answer:

Tip: do not repeat the same possbility again

Step-by-step explanation:

CP, CO, CM, CB, PO, PM, PB, OM, OB, MB

Answer:

the answer is 64 .

Step-by-step explanation:

basically i just divided 48 by 2.4 and got 20 .. so that means that 20 has to be the multiplied factor so i just multiplied 3.2 by 20 and got 64.

Answer:

The limit is [tex]\lim_{x \to 5} \frac{250}{0} = \infty[/tex]

Step-by-step explanation:

The  equation given are

     [tex]f(x) \to 250[/tex]

and   [tex]g(x) \to 0[/tex]

with [tex]g(x) > 0 \ as\ x ---> 5[/tex]

The objective is to obtain

      [tex]\lim_{x \to 5} \frac{f(x)}{g(x)}[/tex]

This mathematically evaluated as

        [tex]\lim_{x \to 5} \frac{250}{0}[/tex]

      [tex]= \lim_{x \to 5} \frac{250}{0} = \infty[/tex]

Answer:

400

Step-by-step explanation:

Answer: 148 is 37% of What Number? 37% of 400 is 148. 100% of 400 is 400, therefore 37 percent of 400 equals 148.

Brainlest would be appreciated.

Answer:

Lucy's percentage profit = 33.33% based on Sales Value

and 50% based on Cost.

Step-by-step explanation:

a) Calculations:

7kg = 7,000g of nuts

Cost of 7,000g = £10

350g = 20 bags (7,000/350)

Sales value = £15 (20 x 75p)

Profit = Sales value minus Cost

Profit = £5 (£15 - £10)

Profit percentage based on sales = Profit/Sales x 100 = 5/15 x 100 = 33.33%

Profit percentage based on cost = Profit/Cost x 100 = 5/10 x 100 = 50%

b) Profit is the excess of sales over cost.  There are two ways to express it in percentages.  Profit can be expressed as a percentage of the cost (Markup).  It can also be expressed as the percentage of the sales value (Margin).

Answer:

The 5 ounce bottle is $0.98 per ounce

The 15 ounce bottle is $0.69 per ounce

The 15 ounce bottle is a better deal because the cost per ounce is lower

Step-by-step explanation:

To find the cost per ounce for each bottle, divide the cost by how many ounces are in the bottle.

4.89 ÷ 5 = 0.978

10.29 ÷ 15 = 0.686

So, the 5 ounce bottle is $0.98 per ounce, while the 15 ounce bottle is $0.69 per ounce.

The 15 ounce bottle is a better deal because the price is lower per ounce.

Buying a 15 ounces bottle for $10.29 is the better deal because it's cheaper.

Since one can buy shampoo in a 5 ounce bottle for $4.89, the cost per ounce bottle will be:

= $4.89/5

= $0.978

Since one can buy a 15 ounces bottle for $10.29, the cost per ounce bottle will be:

= $10.29/15

= $0.686

Read related link on:

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Answer:

Triangle Q R P is shown. The length of Q R is 5 and the length of R P is 6. Angle Q R P is 40 degrees.

Step-by-step explanation:

The trigonometric formula refers the two sides length of the triangle and it also consists of included angle to find out the area

A = [tex]\frac{1}{2}[/tex] ab sin C

QPR contains two sides and the included angle

XYZ has one side and the two angles

DEF has only three sides

And, the ABC contains two sides but does not have the included angle

Based on the explanation above, the correct option is B

Answer: the second option aka B

Step-by-step explanation: The other person explained it and I'm just here to tell you they gave the correct and answer for edge 2020.

Answer:

The percentage of employees with 8 or more years at the company that reported that email is their preferred method of communication is 30.48%. I suppose there was a small typing mistake in option B.

Step-by-step explanation:

The proportion is the number of desired outcomes divided by the number of total outcomes.

The percentage is the proportion multiplied by 100.

In this question:

210 employees with 8 of more year.

Of those, 64 have the email as their preferred method of communication.

64/210 = 0.3048

0.3048*100 = 30.48%

The percentage of employees with 8 or more years at the company that reported that email is their preferred method of communication is 30.48%. I suppose there was a small typing mistake in option B.

In this exercise we have to use the percentage knowledge to calculate the number of employees of the company over the years, in this way we find that this corresponds to:

The percentage of employees with 8 or more years at the company that reported that email is their preferred method of communication is 67,9%. Is D.

They are using the data informed in the text, we have:

So doing the percentage calculation we have that;

[tex]210-64=146\\(146*100)/210=67,19\%[/tex]

See more about Percentage at brainly.com/question/8011401

Answer:

Any equation in the form ax 2 + bx + c = 0 is said to be in quadratic form. This equation then can be solved by using the quadratic formula, by completing the square, or by factoring if it is factorable.

Step-by-step explanation:

Hope it helps

Answer:

a. 1/3 or about 33.33%

b. 5/6 or about 83.33%

Step-by-step explanation:

Answer:

the possibility of a red one is 33.4%

The possibility of a non yellow one is 83.3

Step-by-step explanation:

Answer: Option 3.

Step-by-step explanation:

A rotation around the side AB, means that the side AB remains fixed in the place, and we rotate the vertex C creating in this way a solid figure.

Now, this figure will Create a cone with height AB, and where the radius of the base will be BC. (Where AB is the length of the side AB in the original triangle, and BC is the length of the side BC on the original triangle)

The correct option is option 3.

Answer:

  y = 2x +9

Step-by-step explanation:

The slope-intercept form of the equation of a line is ...

  y = mx +b

where m is the slope and b is the y-intercept.

The problem statement tells you m=2 and y=9. Putting these values into the equation form gives ...

  y = 2x +9

Answer:

When we expand we get -9 - 33i + 30i². Since i² = -1 we can write this as -9 - 33i + 30 * (-1) = -9 - 33i - 30 = -33i - 39.

Answer:

-21-33i

Step-by-step explanation:

(-3+6i)(-3+5i)=9-15i-18i+30i²=9-33i+30(-1)=-21-33i

Answer:

99,7 % of all values will be in the interval ( -2 ; 34)

Step-by-step explanation:

Empirical Rule for the normal distribution with mean X,  implies that the intervals :

X ± σ             will contain  68 % of all values

X ± 2σ           will contain  95 % of all values

X ± 3σ           will contain  99,7 % of all values

Therefore in the interval    X  - 3σ   ;   X + 3σ

X - 3*6    =  X  -18  =  16 - 18 = -2

And

X + 3*6  = X + 18   = 16 + 18 = 34

99,7 % of all values will be in the interval ( -2 ; 34)

Answer:

21.98 is the circumference because is it 7 pi 7 times 3.14. For the area though it is 38.48 because you need to get the radius of the circle and you divided 7 by 2 which is 3.5 and here is the work A=πr2=π·3.52≈38.48451

Step-by-step explanation:

Hope this helped and you understood if you want it would help a lot if you put it brainliest.

Answer: choice D 1/2

Step-by-step explanation:

Events A and B are independent if the equation P(A∩B) = P(A) · P(B) holds true.

so

1/6=1/3*p(A)

p(A)=1/2