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3 years ago

Could someone please help me with this??

Mathematics

2 answers:

Anettt [7]3 years ago

8 0

Answer:

The number of tickets and cost have a proportional relationship.

Step-by-step explanation:

kiruha [24]3 years ago

5 0

Answer:

The number of tickets and cost have a proportional relationship.

Step-by-step explanation:

The points on the graph would be (2,36) , (5,90) , (9,162)

Graph the lines to see if the 'lines' are straight or not.

36/2 = 18

90/5 = 18

162/9 = 18

You can just this to check, as you can see, the rate of change stayed the same, so it is linear and proportional (straight line). Constant of proportionality means that between any 2 points on a line, they will have the same rate of change (aka. slope).

* * *

I don't want to confused anyone so I'll use this chance to explain the difference between linear and proportional.

In simple terms, proportional relationships has the y-intercept at 0. So proportional lines cross the origin (0,0) while linear lines just has to be a straight.

Hope I was able to help! Good Luck!

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Assume that 13% of people are left-handed. If we select 10 people at random, answer the following questions:

Anastasy [175]

Answer:

0.099, 0.969,0.87,8.3.1.063

Step-by-step explanation:

Let X be the left handed people in the sample of 10 people selected.

X is binomial with n=10 and p = 0.13

a) the probability that there are exactly 3 lefties in the group

= $P(x=3) = 10C3 (0.13)^3 (0.87)^7\\= 0.09945\\=0.099$

b) the probability that there are at least 3 lefties in the group

= $P(X\geq 3) =0.9687\\=0.969$

Now Y number of right handers is binomial with n =10 and p = 0.87

c) the expected number of right-handers in the group.

$=E(Y) = np\\= 10(0.83)\\=8.3$

d) the standard deviation of the number of right-handers in the group

= $\sigma Y = \sqrt{npq} \\=1.063485\\=1.063$

5 0

3 years ago

(-9) + (+3)= in adding integers

Umnica [9.8K]

Answer:

The answer is -6

hope this helps

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Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Quadrilateral ABCD has coordinates A(3,-5), B(5,-2), C(10,-4), D(8,-7). Quadrilateral is a

densk [106]

Answer:

Quadrilateral is another word for a shape with four sides.

Step-by-step explanation:

8 0

3 years ago

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What does communitive property mean

madreJ [45]

What you meant was the "commutative" property.

So we can say that when adding:

"Commutative means that the order does not make any difference in the result."

Example:

5 + 6 = 6 + 5

a + b = b + a

The commutative property does not hold for subtraction.

Example:

4 - 1 ≠ 1 - 4

a - b ≠ b - a

Ok, now does the commutative property hold true for multiplication?

2 x 3 = 3 x 2

2 x 3 x 4 = 4 x 3 x 2

Yes.

What about division?

12 ÷ 4 ≠ 4 ÷ 12

The commutative property does not hold for division.

4 0

4 years ago

There are 20 marbles in a bag. Each marble has a different design or color. How many ways can you draw 8 marbles from the jar? I

Digiron [165]

Answer:

The number of ways of selecting a combination of 8 marbles from a bag containing 20 marbles is 125970

Step-by-step explanation:

The number of selecting 8 marbles from a bag of 20 marbles

A combination gives the number of possible order or arrangement in a collection of k items selected from a set of n items

$C_{n,k} = \dbinom{n}{k}= \dfrac{n!}{k!\cdot \left ( n - k \right )!}$

In the question, k = 8, and n = 20

Substituting the values of n and k in the above equation gives;

$C_{20,8} = \dbinom{20}{8}= \dfrac{20!}{8!\times\left ( 20 - 8 \right )!} = 125,970$

Therefore, the number of ways of selecting 8 marbles from a bag containing 20 marbles is given by the combination C₂₀, ₈ = 125970.

8 0

3 years ago