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Leya [2.2K]
3 years ago
13

Please answer all of these

Mathematics
1 answer:
Nina [5.8K]3 years ago
7 0

Answer:

4 is D, 5 is D, 6 is A, 7 is C

Step-by-step explanation:

just do da math

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-9=3x+6 what is the value of x?
Mkey [24]

Answer:

-5

Step-by-step explanation:

3x + 6 = -9

3x = -15

x = -5

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Use a Double- or Half-Angle Formula to solve the equation in the interval [0, 2π). (Enter your answers as a comma-separated list
lara31 [8.8K]
Sin(2θ)+sin(<span>θ)=0
use double angle formula: sin(2</span>θ)=2sin(θ)cos(<span>θ).
=>
2sin(</span>θ)cos(θ)+sin(<span>θ)=0
factor out sin(</span><span>θ)
sin(</span>θ)(2cos(<span>θ)+1)=0
by the zero product property,
sin(</span>θ)=0 ...........(a) or
(2cos(<span>θ)+1)=0.....(b)
Solution to (a): </span>θ=k(π<span>)
solution to (b): </span>θ=(2k+1)(π)+/-(π<span>)/3
for k=integer

For [0,2</span>π<span>), this translates to:
{0, 2</span>π/3,π,4π/3}
8 0
3 years ago
Solve the given equation. State the number and type of roots. x² + 3x- 4
sesenic [268]

Answer:

x=1, x=-4

Two distinct real roots

Step-by-step explanation:

x² + 3x- 4 = (x - 1)(x + 4)

x=1, x=-4

Two distinct real roots

4 0
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Pls look i math pic i put and answer fast plssss i will mark u as brainliest
Lera25 [3.4K]

Answer:it’s 80ft hope this helps

Step-by-step explanation:

8 0
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