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inna [77]
3 years ago
15

Independent practice question 8=-12+5y

Mathematics
2 answers:
kodGreya [7K]3 years ago
7 0
Y= 4

Have a great day :)
Vladimir [108]3 years ago
3 0

Answer:

y=4

Step-by-step explanation:

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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.

8 0
3 years ago
Which equation represents a line which is parallel to the line 8y-3x=-8
marin [14]

First, we need to make the equation given to be in the form;

y=mx + b

where m is the slope and b is the intercept

8y - 3x = -8

Add 2x to both-side of the equation

8y = 3x - 8

Divide through the equation by 8

y = 3/8 x -1

comparing the above with y =mx + b

m = 3/8

slope of parallel equations are equal

From the options given the only equation with slope 3/8 is;

y= 3/8 x + 8

y=\frac{3}{8}x\text{ + 8}

The above equation of the line is parallel to 8y - 3x = -8

7 0
1 year ago
What is the measure of the missing exterior angle?
larisa86 [58]

Answer:

the missing angle is 148°

Step-by-step explanation:

the sum of all exterior angles of a triangle are 360°

so, 360-138-74 = 148°

3 0
2 years ago
Evaluate the function f(x) = 2x + 2, when x = -1<br> W.4<br> X. 3<br> Y. O <br> Z -4
madreJ [45]

Hello.

Simply plug -1 into 2x+2.

f(x) = 2x +2

f(-1) = 2 (-1) +2

f (-1)= -2+2

f(-1) = 0

Hope this helped.

**************************

Disclaimer:

Always double check your answer with a reliable source, as mistakes can be made.

3 0
3 years ago
An airplane is preparing to land an airport. It is 34,800 feet above the ground and descending at the rate of 3,000 feet per min
sveta [45]

Answer:

6 mins, and the altitude will be 16,800 ft

Step-by-step explanation:

1st: Subtract 3000 from 34800

2nd: Multiply 2 to 2800

Keep doing this until you get the same altitude for each one.

3 0
3 years ago
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