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Step2247 [10]
3 years ago
6

Y^2-y-42 pls helpppppp i dunno how to do this one??

Mathematics
2 answers:
beks73 [17]3 years ago
6 0
(y-7)(y+6)
Hopefully this is right :)
krek1111 [17]3 years ago
6 0
(y-7) (y+6) is the correct answer for this question
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Given that x=3sin​​θ-2 and y=3cos​​​θ+4.Show that (x+2)²+ (y-4)²=9​​​​​​
asambeis [7]

Answer:

First, plug-in x and y as 3sin​​θ-2 and 3cos​​​θ+4 into the equation, respectively:

((3\sin (\theta)-2)+2)^2 + ((3\cos (\theta)+4)-4)^2 = 9

Then, +2 and -2 cancel out and +4 and -4 cancel out as well, leaving you with:

(3\sin(\theta))^2+(3\cos(\theta))^2=9

We can factor out 3^2 = 9 from both equations:

9(\sin(\theta)^2+cos(\theta)^2) = 9

We know from a trigonometric identity that \sin(\theta)^2+cos(\theta)^2 = 1, meaning we can reduce the equation to:

9(1) = 9

9=9

And therefore, we have shown that (x+2)^2 + (y-4)^2 = 9, if x=3sin​​θ-2 and y=3cos​​​θ+4.

Hope this helped you.

7 0
3 years ago
What expression is equivalent to (x2+3x-4)(x-5)
dlinn [17]
(x²+3x-4)(x-5)
x³-5²+3x²-15x-4x+20
x³-2x²-19x+20
6 0
4 years ago
When 7 is subtracted from 3 times a certain number , the result is 28. What is the number
FrozenT [24]

The number will be equal to 11.67.

<h3>What is an expression?</h3>

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication and division.

The expression will be formed from the given data. Let the number be x so the expression will be:-

3x - 7 = 28

3x = 35

x = 35 / 3

x = 11.67

Therefore the number will be equal to 11.67.

To know more about Expression follow

brainly.com/question/723406

#SPJ1

7 0
2 years ago
Find all the zeros of the equation.<br> -x^3-x^2=11x+11
anyanavicka [17]

Answer:

x= -1 , i(sqrt11) , -i(sqrt11)

Step-by-step explanation:

subtract 11x from both sides

-x^3 - x^2 - 11x = 11

subtract 11 from both sides

-x^3 - x^2 - 11x - 11 = 0

Factor the left side of the equation

- (x - 1)(x^2 + 11) = 0

Set both factors to zero and solve for x

x + 1 = 0 x^2 + 11 = 0

-1 -11

x^2 = -11

x = -1 x = +/- i(sqrt11)

7 0
3 years ago
Can i get my work checked?
Debora [2.8K]

Answer:

you are correct

Step-by-step explanation:

since this was a random sampling, there can be no source of bias.

7 0
4 years ago
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