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3 years ago

Solve the inequality for x. –2x – 3 > 13 A) x < –5 B) x < –8 C) x > –5 D) x > –8

Mathematics

1 answer:

s344n2d4d5 [400]3 years ago

5 0

Answer:

B x<-8

Step-by-step explanation:

-2x -3> 13

-2x > 13+3

-2x >16

since you will divide both side by a negative number, the operator will change from > to <

-2x /-2 < 16/-2

x<-8

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It has been observed that, during various forms of social competition, men experience an increase in testosterone levels. A 2018

svetoff [14.1K]

Answer:

= ( -4.725, 6.945) pg/ml

Therefore at 95% confidence interval (a,b) = ( -4.725, 6.945) pg/ml

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 gain x = 1.11 pg/ml

Standard deviation r = 15.18 pg/ml

Number of samples n = 26

Confidence interval = 95%

z(at 95% confidence) = 1.96

Substituting the values we have;

1.11+/-1.96(15.18/√26)

1.11+/-1.96(2.977042931397)

1.11+/-5.835004145539

1.11+/-5.835

= ( -4.725, 6.945) pg/ml

Therefore at 95% confidence interval (a,b) = ( -4.725, 6.945) pg/ml

7 0

3 years ago

The equation of a linear function in point-slope form is y – y1 = m(x – x1). Harold correctly wrote the equation y = 3(x – 7) us

Doss [256]

Answer:

The answer to your question is (7, 0)

Step-by-step explanation:

Data

A (7, 3)

B (0, 7)

C (7, 0)

D (3, 7)

Process

1.- Substitute each point in the equation to find the answer

Point A y - 3 = m(x - 7)

Point B y - 7 = m(x - 0)

Point C y - 0 = m(x - 7)

Point D y - 7 = m(x - 3)

2.- Conclusion

The only possibility is that m = 3 and the answer will be the third point (7,0)

5 0

3 years ago

Read 2 more answers

25 POINTS

Keith_Richards [23]

Answer:

is this like a multiple answer thing or is it 1

Step-by-step explanation:

if it's 1 answer I choose c

3 0

3 years ago

Read 2 more answers

Solve this problem out

Virty [35]

Option C

When $(2x - 3)^2$ is subtracted from $5x^2$ then the result is $x^2 + 12x - 9$

<h3>Solution:</h3>

Given that $(2x - 3)^2$ is subtracted from $5x^2$

We have to find the result

Subtraction is a mathematical operation that tells us the difference between two numbers.

When "a" is subtracted from "b", we write in mathematical expression as "b - a"

So $(2x - 3)^2$ is subtracted from $5x^2$ is written mathematically as:

$\rightarrow 5x^2 - (2x - 3)^2$

Expanding the above expression using algebraic identity:

$(a-b)^2 = a^2 - 2ab + b^2$

$\rightarrow 5x^2 - ((2x)^2 -2(2x)(3) + (3)^2)\\\\\rightarrow 5x^2 - (4x^2 - 12x + 9)$

Multiplying the nnegative sign with terms inside bracket

There are two simple rules to remember:

When you multiply a negative number by a positive number then the product is always negative.

When you multiply two negative numbers or two positive numbers then the product is always positive.

$\rightarrow 5x^2 - (4x^2 - 12x + 9)\\\\\rightarrow 5x^2 - 4x^2 + 12x -9\\\\\rightarrow x^2 + 12x - 9$

Hence the result is: $x^2 + 12x - 9$

3 0

3 years ago

Solve for y: 3y+4y=56

nydimaria [60]

Add 3y and 4y: 7y=56
Divide by 7: y=8

4 0

4 years ago