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erma4kov [3.2K]
4 years ago
14

HELP PLEASE 100 POINTS WILL MARK BRAINLIEST

Mathematics
2 answers:
Sedbober [7]4 years ago
6 0

Answer:

the answer is C.

~batmans wife dun dun dun.....

sweet-ann [11.9K]4 years ago
3 0
Substitution is where you solve for one of the variables and then plug that in for the same variable in the other equation. Here, there is already an equation that is solved for a variable, \sf y=4x-11. So we can plug in '4x - 11' for 'y' in the other equation:

\sf 3x+5y=-9

\sf 3x+5(4x-11)=-9

Distribute 5 into the parenthesis(multiply it to every term in the parenthesis):

\boxed{\sf 3x+20x-55=-9}

Your answer is C.
You might be interested in
2 lines are not parallel, how many solutions are there
garri49 [273]

Answer:

Either one: the two line have a point in common, or infinite: they are the same line.

5 0
2 years ago
How do I solve this?​
aev [14]
I need more information in order to solve it
3 0
3 years ago
Simplify using trigonometric identities<br> 2sinθ - sin2θ cosθ
Anit [1.1K]

Double angle identity for sine:

\sin(2x) = 2 \sin(x) \cos(x)

\implies 2 \sin(\theta) - \sin(2\theta) \cos(\theta) = 2 \sin(\theta) - 2 \sin(\theta) \cos^2(\theta)

Factorize the left side.

2 \sin(\theta) - 2 \sin(\theta) \cos^2(\theta) = 2 \sin(\theta) \left(1 - \cos^2(\theta)\right)

Pythagorean identity:

\cos^2(x) + \sin^2(x) = 1

\implies 2 \sin(\theta) \left(1 - \cos^2(\theta)\right) = 2 \sin^3(\theta)

so that

\boxed{2 \sin(\theta) - \sin(2\theta) \cos(\theta) = 2 \sin^3(\theta)}

8 0
2 years ago
If 3/4 of a certain number is equal to 9 find the number <br>​
NeTakaya

write the equation.

3/4n=9

now solve.

3/4n=9

/3/4  /3/4

n=12

---

hope it helps

4 0
3 years ago
Read 2 more answers
If T(x, y) = (x + 5, y + 6) and Pris the image of P, what is the rule for the translation in which P is the image of P'? T(x, y)
xxTIMURxx [149]

Answer:

The translation is;

T(x,y)=(x-5,y-6)

Explanation:

Given the translation rule;

T(x,y)=(x+5,y+6)

when P' is the image of P.

For the inverse, when P is the image of P', the Translation rule would become;

\begin{gathered} x=x^{\prime}+5 \\ x^{\prime}=x-5 \\ y=y^{\prime}+6 \\ y^{\prime}=y-6 \\ So,\text{ the translation rule becomes;} \\ T(x,y)=(x-5,y-6) \end{gathered}

The translation is;

T(x,y)=(x-5,y-6)

3 0
1 year ago
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