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3 years ago

(9y+5x) (9y-5x) Simplify your answer.

Mathematics

1 answer:

Alex777 [14]3 years ago

6 0

Answer:

$81 {y}^{2} - 25 {x}^{2}$

Step-by-step explanation:

$(9y+5x) (9y-5x) \\ \\ = {(9y)}^{2} - {(5x)}^{2} \\ \\ = 81 {y}^{2} - 25 {x}^{2}$

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Solve for w what is w/125=5

Thepotemich [5.8K]

W/125=5
125x5=W
625=W

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3 years ago

Change equation to slope intercept form 2x-3y=15

meriva

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3 years ago

I cant find out the answer for the life of me

Kaylis [27]

Answer:

A. h = (S/2πr) - r

Step-by-step explanation:

Solve the given for h:

S = 2πrh + 2πr²

Isolate h:

2πrh = S - 2πr²

Divide all terms by 2πr:

h = (S/2πr) - r

Correct choice is A

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2 years ago

The lengths of two sides of a right triangle are 12 inches and 15 inches. What is the difference between the two possible length

Lena [83]

In the problem, two legs measurement were given such as:
Leg 1 = 12 inches
Leg 2 = 15 inches

We need to solve for the third leg. Since it is a right triangle, we can use Pythagorean theorem in solving the missing leg:
c²=b²+a²

When we assume that the third leg is the "c", we can for the value such as:
c² = 12²+15²
c=19.21

When we assume that the third is either "a" or "b":
15² =a² + 12²
a=9

Then, the possible measurement of the third leg is 9 or 19.21.
The difference between the two possible answer is shown below:
Difference = 19.21 -9 = 10.21
Difference =10.21

6 0

3 years ago

Determine what the solution is to the following system? Y=3/4x-1 & y=4/3x-1

vichka [17]

Answer:

(0, -1)

Step-by-step explanation:

There are multiple ways of solving this however- since both equations are already in Y-Intercept form, we will use the "Equal Values Method"

First, since both equations are equal to Y, we can set them equal to each other and solve for X

$\frac{3 }{4} x - 1 = \frac{4}{3} x - 1$

To start, you must eliminate the fraction using a "fraction buster" multiply EVERYTHING by 4 then simplify.

$3x - 4 = 5 \frac{1}{3}x - 4$

Since we still have a fraction, we shall do it one more time. This time we multiply by 3

$9x - 12 = 6 x - 12$

Now, solve how you normally would.

9x = 6x

-6x

3x = 0

X = 0

Now, since we know what X would equal in the solution, we are able to plug in X as 0 in one of our equations. We can choose the first one!

$y = \frac{3}{4} (0) - 1$

Now solve which would lead to y = -1

You have your solution as

(X,Y)

(0,-1)

Hope this helps!

4 0

3 years ago