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ICE Princess25 [194]
3 years ago
7

Please help:))))))

Mathematics
1 answer:
Veronika [31]3 years ago
8 0

Answer:

1. 6x^2 + 4x - 4y

2. x - 10y.

3. 6x^5

4.  36 a^6 b^8

5. x^2 - 81

6. 9x^2 - 42x + 49

7. 12x^2 +3x - 42


Step-by-step explanation:

1. 3x^2+4x+3x^2-4y

Add the like terms, we get

6x^2 + 4x - 4y


2. (5x-2y)-(4x+8y)

Now distribute the negative sign, we get

5x - 2y -4x -8y

Simplify the like terms, we get

x - 10y.


3. 3x^3(2x)^2

Multiply the numbers and simplify the variables

6x^(3 +2)

6x^5

4. (-6a^3b^4)^2

Now bring the power 2 inside the parenthesis.

-6^2 a^6 b^8

= 36a^6b^8


5. (x+9) (x-9)

x^2 + 9x -9x - 81

x^2 - 81


6. (3x-7)^2

(3x - 7)(3x - 7)

9x^2 - 21x -21x + 49

9x^2 - 42x + 49


7. (3x+6) (4x-7)

12x^2 + 24x -21x - 42

12x^2 +3x - 42

Thank you.

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Pls help!!!!!!!! Will give brainliest!!!!!!!!!!!
prohojiy [21]
Okay so lets look at the equation given
a ^{2} + {b}^{2} = {c}^{2}
this is the Pythagorean theorem, this equation holds true to all right angle triangles.

for the "a" and "b" terms must be the two shortest lengths and "c" must be the longest length.
why? because "c" represents the hypotenuse in this theorem and the hypotenuse is by definition the longest side of a right triangle.

(side note: always draw a picture, it helps a lot if you doodle a bit to get an idea of what you are working with)

we are given three lengths : 3 , 4, and 5 (im ignoring the measurements for now)

we can look at it two ways with a picture and through algebra

try to draw a right triangle with the given info. you'll see there are only two cases were this is possible the picture above is one case where this is not possible

now we can look at this algebraically
a = 3 \\ b = 4 \\ c = 5
(but "a" and "b" can swap lengths)

now with the Pythagorean theorem we can see how this plays out
{a}^{2} + {b}^{2} = {c}^{2} \\ {3 }^{2} + {4}^{2} = {5 }^{2} \\ 9 + 16 = 25 \\ 25 = 25
and heres with "a" and "b" lengths swapped
{4}^{2} + {3}^{2} = {5}^{2} \\ 16 + 9 = 25 \\ 25 = 25
now here's a case when we let 5 , our longest length , become a leg and let one our shorter lengths take the place of "c"

a = 5 \\ b = 3 \\ c = 4 \\ {5}^{2} + {3}^{2} = {4}^{2} \\ 25 + 9 = 16 \\ 34 = 16 \:
obviously 34 does not equal 16

hope this helped you out

4 0
3 years ago
Hal has a steel barrel with a diameter of 6 feet that can be filled to a depth of 4.6 feet with oil. What is the volume of the b
scoray [572]

Answer:

129.996 cubic feet

Step-by-step explanation:

Assuming that the barrel is a perfect cylinder, we can use the formula to find the volume:

\pi(r)^2(h)

First, we have to find the radius, which is:

D = 2r

So the radius is 3 feet, since it is half of the diameter. Then, we plug in the values.

3.14(3)^2(4.6)

Now, we solve. Exponents are first...

3.14(9)(4.6)

Now multiply left to right.

28.26(4.6)

129.996 cubic feet

Therefore, the barrel can hold 129.996 cubic feet of oil. Hope this helps you!

3 0
3 years ago
(a) Compute two lines of regression from the following data:
Natasha_Volkova [10]

Answer:

can you write this on paper and send me? i have feeling ik this but i don't understand what u need

3 0
3 years ago
what is the equation for A 450-gallon tank full of water is draining at a rate of 20 gallons per minute.
zhuklara [117]

Answer: 150

Step-by-step explanation:

4 0
3 years ago
Please help me!!!!!!!
Helen [10]
First we will find the value of x.

To find the value of x we can add angle Q and angle O and set them equal to 180 and solve for x.

We will be setting them equal to 180 since the opposite angles of an inscribed quadrilateral are supplementary.

angle Q + angle O = 180
6x - 5 + x + 17 = 180
7x +12 = 180
7x = 168
x = 24

Now we can use 24 for x and find the value of angle QRO

angle QRO = 2x + 19
angle QRO = 2(24) + 19
angle QRO = 48 + 19
angle QRO = 67

So the answer choice B is the right answer.

Hope this helps :)<span />
6 0
3 years ago
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