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melomori [17]
2 years ago
5

The difference between two positive numbers , 12/(x + 1) and 12/x , 1. () Form an equation in x and show that it reduces to x ^

2 + x - 12 = 0 . (ii) Solve the equation x ^ 2 + x - 12 = 0 . () Hence , find the two numbers .
Mathematics
1 answer:
stiks02 [169]2 years ago
4 0

Answer:

Step-by-step explanation:

12

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Lines m and n are parallel. Line m is described by y=4x+2. Line n contains the point (1, -3). Which of the following is an equat
Semmy [17]

The equation of <em>line m</em>, in point-slope form is: y + 3 = 4(x - 1)

<em><u>Recall:</u></em>

  • The slopes of parallel lines are equal to each other.
  • Slope-intercept form equation is: y = mx + b, where m is slope and b is y-intercept.
  • Point-slope form equation is: y - y_1 = m(x - x_1) where, (x_1, y_1) is a point and m is the slope.

Equation of line m is y = 4x + 2

Slope of line m is 4

Since line m and line n are parallel, both lines will have the same slope. Therefore, the slope of line n is 4.

To write the equation for line if it contains the point (1, -3), substitute (x_1, y_1) = (1, -3) and m = 4 into y - y_1 = m(x - x_1):

y - (-3) = 4(x - 1)\\\\\mathbf{y + 3 = 4(x - 1)}

Therefore, the equation of <em>line n</em>, in point-slope form is: y + 3 = 4(x - 1)

Learn more about point-slope equation on:

brainly.com/question/24907633

4 0
3 years ago
Consider random samples of size 58 drawn from population A with proportion 0.77 and random samples of size 70 drawn from populat
fredd [130]

Answer:

Step-by-step explanation:

a) The formula for determining the standard error of the distribution of differences in sample proportions is expressed as

Standard error = √{(p1 - p2)/[(p1(1 - p1)/n1) + p2(1 - p2)/n2}

where

p1 = sample proportion of population 1

p2 = sample proportion of population 2

n1 = number of samples in population 1,

n2 = number of samples in population 2,

From the information given

p1 = 0.77

1 - p1 = 1 - 0.77 = 0.23

n1 = 58

p2 = 0.67

1 - p2 = 1 - 0.67 = 0.33

n2 = 70

Standard error = √{(0.77 - 0.67)/[(0.77)(0.23)/58) + (0.67)(0.33)/70}

= √0.1/(0.0031 + 0.0032)

= √1/0.0063

= 12.6

the standard error of the distribution of differences in sample proportions is 12.6

b) the sample sizes are large enough for the Central Limit Theorem to apply because it is greater than 30

8 0
3 years ago
I BET NO ONE KNOWS THIS What is the number of moles of Ba(NO3)2 in 135 g Ba(NO3)2? _____ mol Ba(NO3)2
yaroslaw [1]

Answer:

261.3368

Step-by-step explanation:

4 0
3 years ago
a snowboarder descends a 1200-foot hill in 3 minutes. what is the mean change in elevation per minute
Vilka [71]
If you would like to know the mean change in elevation per minute, you can calculate this using the following steps:

1200-foot ... 3 minutes
x-foot = ? ... 1 minute

1200 * 1 = 3 * x
1200 = 3 * x
x = 1200 / 3
x = 400-foot

The correct result would be 400-foot per minute.
7 0
4 years ago
I'm confused on how to solve this!!
irina [24]
The first answer is [7, (infinity symbol) )
the second one is (1, (infinity symbol) )
8 0
4 years ago
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