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Allushta [10]
2 years ago
10

Which order pair is not included in the graph of y= 3x+6 the coordinates is (1,9) (10,36) (3,12) (6,18)

Mathematics
2 answers:
Assoli18 [71]2 years ago
8 0

Answer:

The pair is not included in the graph of y= 3x+6 ⇒ <u>(3,12) & (6,18)</u>

Step-by-step explanation:

given ⇒ y = 3x + 6

It is a linear equation, can be graphed easily by supposing two point of x and find the corresponding value of y ⇒ see the table.

See the attached figure.

As shown on the figure, the line passes through all the points except

<u>(3,12) and (6,18)</u>

serious [3.7K]2 years ago
3 0

Answer:

(3,12)

Step-by-step explanation:

you would put the 12 as y then 3×3=9+6=15 and 12 doesn't equal 15

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consider the function f(x) = x2 2x – 15. what are the x-intercepts of the function? left-most x-intercept: ( , 0) right-most x-i
eimsori [14]

we have

f(x)=x^{2} +2x-15

we know that

The x-intercept is the value of x when the value of the function is equal to zero

so

in this problem

Find the roots of the function

equate the function to zero

x^{2} +2x-15=0

Group terms that contain the same variable, and move the constant to the opposite side of the equation

x^{2} +2x=15

Complete the square. Remember to balance the equation by adding the same constants to each side

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Rewrite as perfect squares

(x+1)^{2}=16

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(x+1)=(+/-)\sqrt{16}

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<u>the answer is</u>

the x-intercepts are the points (3,0) and (-5,0)

3 0
3 years ago
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Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. Thi
Dovator [93]

Complete question:

Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby this mention is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect so the probability of a girl is 0.5. Assume that the group consists of 36 couples.

A) Find the mean and standard deviation for the number of girls in groups of 36 births.

B) Use the range rule of thumb to find the values separating results that are significantly low and significantly high.

C) Is the result of 33 girls significantly high? A result of 33 girls would suggest the method is effective or is not effective?

Answer:

a) mean = 18

Standard deviation =3

b) low range = 12

High range = 24

c) The result of 33 girls is significantly high. Yes, the method is effective.

Step-by-step explanation:

Given:

p = 0.5

n = 36

a) The mean is the product of n and p

Mean u = np

u = 36 * 0.5 = 18

The standard deviation is the square root of the product of n and p&q.

S.d ó = \sqrt{npq}

= \sqrt{np(1-p)}

= \sqrt{36(0.5)(1-0.5)} = \sqrt{9} = 3

b) To find the range rule of thumb:

• For low range

Low range = u - 2ó

= 18 - (2 * 3)

= 12

• High range

= u + 2ó

= 18 + (2*3)

= 24

c) The result is significantly high, because 33 is greater than 24 girls.

A result of 33 girls would prove the method as effective.

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