All categories

2 years ago

Which equation is a linear function? y=2^x -1 y=x/2-5 y=2/x +3 y=x^2 +7

Mathematics

1 answer:

Umnica [9.8K]2 years ago

5 0

Answer:

Second Choice.

Step-by-step explanation:

$y = mx + b$

That is the linear function. Any coefficients with higher degrees won't be considered as a linear function.

So we can cut out the first and last choice.

Then we have only two choices which are

$y = \frac{x}{2} - 5 \\ y = \frac{2}{x} + 3$

The second equation is called Rational Function where a variable is a denominator.

Therefore, the correct answer is second choice.

You might be interested in

If a = 2 and b = 5, then the value of the expression 3a - 2b + 5 is

sweet [91]

Answer:

here is your answer!!!

Step-by-step explanation:

mark as brainliest and drop some thanks!!

8 0

2 years ago

Pls help in a middle of an exam

KIM [24]

Answer:

$\frac{2x^2+4x-9}{(2x-3)(2x+3)(x-1)}$

Step-by-step explanation:

$\frac{2x}{4x^2-9} + \frac{3}{2x^2+x-3}$ can be simplified to:
$\frac{2x}{(2x-3)(2x+3)}+\frac{3}{(2x+3)(x-1)}$

Make them have common denominators so:
$\frac{(2x)(x-1) +3(2x-3)}{(2x-3)(2x+3)(x-1)}$

Simplify:
$\frac{2x^2-2x+6x-9}{(2x-3)(2x+3)(x-1)} = \frac{2x^2+4x-9}{(2x-3)(2x+3)(x-1)}$

I don't think you can simplify that fraction further so that's the answer.

3 0

2 years ago

Math question for 30 points please answer correctly

joja [24]

Answer:

D. The rate of change for function B is greater than the rate of change for function A

Step-by-step explanation:

Function a has a slope (aka rate of change) of 3/3

I know this because we start at (-3, 0) then finish at (0, 3)

We added 3 to both the x value and the y value.

3/3 = 1, so we have a rate of change of 1 for function A

Now that we know this, we can write the equation out into slope intercept form.

We can get y = x + 3

The equation for function B is y = 5x + 5

The slope for function B is greater, therefore the rate of change for function B is greater than the rate of change for function A

4 0

2 years ago

Which is the y-intercept of a line that has a slope of -3 and passes through point (0,-7)

katovenus [111]

Answer:

(0, -7)

Step-by-step explanation:

The y-intercept is the point on the line where x = 0 (AKA where the line crosses the y-axis).

Here, the y-intercept is literally given within the question as (0, -7).

8 0

2 years ago

Read 2 more answers

Can someone explain this to me please will give brainliest

KATRIN_1 [288]

The answer is A. for this, you have to set up a system of equations. the first one will be the area equation. since you know area=length x width, your equation will be LxW=50. the next equation is L=2W, since the length is two times the width. then, plug in 2W for the L in the other equation and you get 2W^2=50. divide by 2 and get W^2=25. square root both sides and you get W=5. plug back into the other equation to find L=10. Then, add the sides of the rectangle for the perimeter. 10+5+10+5=30.

3 0

2 years ago