All categories

3 years ago

What is the answer 2a+6/a^2-9

Mathematics

1 answer:

ollegr [7]3 years ago

5 0

Answer:

Step-by-step explanation:

2a + 6 / a² -9 = 2(a + 3) / (a² -3²)

= 2(a+3) / (a+3)(a-3) {a²-b² = (a+b)(a-b)

= 2 / (a-3)

You might be interested in

What number is 40% of 720

Pepsi [2]

Answer:

the answer should be 288

8 0

3 years ago

Read 2 more answers

Consider the function below. (If an answer does not exist, enter DNE.) g(x) = 190 + 8x3 + x4 (a) Find the interval of increase.

galben [10]

Answer:

The interval of increase of g(x) is $(-6,+\infty)$ .

Step-by-step explanation:

The interval of increase occurs when first derivative of given function brings positive values. Let be $g(x) = 190 + 8 \cdot x^{3} + x^{4}$ , the first derivative of the function is:

$g'(x) = 24 \cdot x ^{2} + 4\cdot x^{3}$

$g'(x) = 4 \cdot x^{2}\cdot (6+x)$

The following condition must be met to define the interval of increase:

$4\cdot x^{2} \cdot (x+6) > 0$

The first term is always position due to the quadratic form, the second one is a first order polynomial and it is known that positive value is a product of two positive or negative values. Then, the second form must satisfy this:

$x + 6 > 0$

The solution to this inequation is:

$x > - 6$

Now, the solution to this expression in interval notation is: $(-6,+\infty)$

3 0

3 years ago

Why might you need measure a perimeter with a measuring tape instead of a ruler

hammer [34]

The perimeter may not be small enough to measure with just a ruler. For example, if a side of a rectangle was 30 inches, how would you use a 12 inch ruler to accurately measure that side? Also, if you were measuring a shape like a circle or oval, a tape measure is flexible.

3 0

3 years ago

Read 2 more answers

Please help with this (for a test tomorrow), if you could show all working out for the 2 examples, sin(<img src="https://tex.z-d

ELEN [110]

Answer:

[tex][pi]

Step-by-step explanation:

Hope it is helpful

6 0

2 years ago

The same garden shop sells mulch according to the equation y = 20x, where y represents the cost in dollars, and x represents the