What does it mean when a set is closed under addition?

Answer:

This is your answer

2)

Okay so because the right side is two times the length and width of the left side, we need to divide 20 and 14 by 2 which gives us 10 and 7. That means x+2 = 10 so we need to subtract 2 from each side which gives you 8. Therefore, x = 8.

20/2 = 10

10 - 2 = 8

x = 8

Answer:

5

Step-by-step explanation:

x - 10 = -5

+ 10. +10

x = 5

hope this helps

Answer:

1 is 136, 2 is 44, annd 4 is 44

Step-by-step explanation:

Answer:

257169554605/657 or about 391430068

Answer:

1844540.13242 or 1844540 R 87

Step-by-step explanation:

(393874112 ) - (1605736979) = -1211862867 ÷ 657 = 1844540.13242

The long division work is in the image.

Answer:

He would pay $62.10

Step-by-step explanation:

   $42.50

+  $25.00

   $67.50

-          8%

   $62.10

Answer:

If you put the equation into go__ogle you will get an explanation on how to solve

Step-by-step explanation:

Answer:

(x-1) (5x+7)

Step-by-step explanation:

I factored using the berry method

Answer:

B)

4.5 cm

Step-by-step explanation:

The formula for arc length when our central angle is in degrees =

2πr(θ/360)

θ = 86°

Diameter = 6cm Radius = Diameter /2

Radius = 6cm/2 = 3cm

Hence,

Intercepted arc length = 2 × π × 3 (86/360)

= 2 × π × 3 × 0.2388888889

= 4.5029494701 cm

Approximately = 4.5 cm

Option B is the correct answer

Answer:

answer is 156753.03

Step-by-step explanation:

Answer:4

Step-by-step explanation:ts is = ed

Answer:

[tex] \frac{10}{53 \times 46 \times 26} [/tex]

Step-by-step explanation:

The probability of matching the number drawn on the gold ball is

[tex] \frac{1}{46} [/tex]

The number of possible pairs of numbers from 1 to 53 is

[tex] \binom{53}{2} = \frac{53 \times 52}{2} = 53 \times 26[/tex]

Choosing 5 numbers, you are choosing 10 different pairs:

[tex] \binom{5}{2} = \frac{5 \times 4}{2} = 10[/tex]

Therefore the probability of correctly matching the drawn pair is

[tex] \frac{10}{53 \times 26} [/tex]

Thus, the probability of winning (matching the pair AND the gold ball) is

[tex] \frac{10}{53 \times 46 \times 26} [/tex]

Answer:

497.39 FEET

Step-by-step explanation:

Please check the attached image for a diagram of the bearings

This question can be solved using Pythagoras theorem

The Pythagoras theorem : a² + b² = c²

we want to determine the value of c

250² + 430² = 247400

c = √247400 = 497.39 feet

Answer: I’m pretty sure it’s 15 cm

Step-by-step explanation:

Answer:

The probability is 0.022

Step-by-step explanation:

Firstly, we need to get the total number of balls in the urn

mathematically, we have this as ;

8 + 9 = 17

now, the probability of selecting a white ball will be the number of white balls divided by the total number of balls

Mathematically, we have this as 9/17

Now, since the event is carried out with replacement, the probability for the six times is the same

So, we have the probability as;

(9/17)^6 = 0.022

Answer:

0.5

Step-by-step explanation:

rate of change is just a synonym for slope and the equation for slope is y=mx +b where m is the slope so 0.5=m and if m= slope then 0.5=slope=rate of change :)

Answer:

first question

AB=CD=15cm

BD=AC=8cm

The distance driven in 1 hour is 80 km. Therefore, option B is the correct answer.

The given time graph shows the proportional relationship between the distance driven and the amount of time driving.

If an object moves along a straight line, the distance travelled can be represented by a distance-time graph. In a distance-time graph, the gradient of the line is equal to the speed of the object. The greater the gradient (and the steeper the line) the faster the object is moving.

From the graph, we can see that object A moved 400 km in 5 hours time.

So, in 1 hour the distance travelled by object =400/5=80 km

Therefore, option B is the correct answer.

To learn more about the distance-time graph visit:

https://brainly.com/question/1378025.

#SPJ5

Answer:

6

Step-by-step explanation:

If she wants to go from 18, to 9, which is 1/2, then she’d have to cut the time in half as well. 12 divided by 2 is 6!

Hope this helped you!

Answer:

The balance of the savings account in 15 years will be $1,750.24.

Answer:

if $0.25 for each mile, then $1.00 =1 mile.

so the first day would be = $1=1mile

$n=11 miles

= 1n= 11×1=$ 11

Step-by-step explanation:

and the 2nd day is = 14×1= $14.

So the answer is 14+11=$25.00

Answer:

20.93

Step-by-step explanation:

20.00 > 2.00

Answer:

30.6688

Step-by-step explanation:

We usually use the formula SOHCAHTOA meaning Sine = opposite side/hypotenuse Cosine = opposite side /hypotenuse then Tangent = Opposite side/Adjacent side. We then say Tan61°= x/17 to get the height as 30.6688 PS/ Hypotenuse is the slanting side of the triangle

Answer:

the slope should represent the fee of each class

.

the vertical intercept is the membership fee

Answer:

the y-inyetcept means the starting fee to join

and the slope means fee per class paid by the customers.

Step-by-step explanation:

Answer:

3.74-a

7

2.64

4.58

Step-by-step explanation:

hope it helps please mark me as brainlist

Answer:

185

Step-by-step explanation:

Population size = 800

Sample size = 160

Number of blue-eyed rabbit in sample = 37

The proportion of blue-eyed rabbit in the sample is :

p = number of blue eyed rabbit / sample size

p = 37 / 160 = 0.23125

Estimated number of blue eyed rabbit in population :

p * population size

0.23125 * 800

= 185