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Monica [59]
3 years ago
10

What is the x-intercept of this line?

Mathematics
2 answers:
Gnesinka [82]3 years ago
3 0

Answer:

-4

Step-by-step explanation:

jeka57 [31]3 years ago
3 0
To find the intercept of a line you need to make the other variable equal to 0.

3x+4(0)=12
3x=12
x=4

The right answer would be 4.
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1. A sample consists of 75 TV sets purchased several years ago. The replacement times of those TV sets have a mean of 8.2 years.
Greeley [361]

Answer:

8.2+/-0.25

= ( 7.95, 8.45) years

the 95% confidence interval (a,b) = (7.95, 8.45) years

Step-by-step explanation:

Confidence interval can be defined as a range of values so defined that there is a specified probability that the value of a parameter lies within it.

The confidence interval of a statistical data can be written as.

x+/-zr/√n

Given that;

Mean x = 8.2 years

Standard deviation r = 1.1 years

Number of samples n = 75

Confidence interval = 95%

z value(at 95% confidence) = 1.96

Substituting the values we have;

8.2+/-1.96(1.1/√75)

8.2+/-1.96(0.127017059221)

8.2+/-0.248953436074

8.2+/-0.25

= ( 7.95, 8.45)

Therefore the 95% confidence interval (a,b) = (7.95, 8.45) years

3 0
3 years ago
Add the following polynomials (2x + 5) + (-1x -4) Answer options: 3x + 9, 3x + 1, 1x + 1, 1x + 9
Leni [432]

Answer:

1x+1

Step-by-step explanation:

just open the parentheses

3 0
3 years ago
Find the area of the shape shown below.
hichkok12 [17]

Answer:

26.75 units ^2

Step-by-step explanation:

Since the shape is complex, divide it into 3 right angled triangles and one square. Find the area of these individual shapes first, then fin the sum of these area to calculate the ultimate area of e complex shape:

Triangle 1 = 1/2 x 2 x 5 = 5 units ^2

Triangle 2 = 1/2 x 2 x 2 = 2 units ^2

Triangle 3 = 1/2 x 3.5 x 9 = 15.75 units ^2

Square = 2 x 2 = 4 units squared.

Now add all these up 15.75 + 2 + 5 + 4 = 26.75 units squared.

Hope this helps

6 0
3 years ago
Two times the sum of nine and a number is the opposite of 9.
marshall27 [118]
18 that question is confusing so I guessed sorry dude
8 0
3 years ago
Please need help on this
IrinaVladis [17]

The first statement is true.

The second statement is false.

The third statement is true.


4 0
3 years ago
Read 2 more answers
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