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EleoNora [17]
3 years ago
7

What is the solution of the following system? -3x-2y=-12 9x+6y=-9

Mathematics
1 answer:
Alisiya [41]3 years ago
7 0
The answer is : no solution
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8.7/2=q/4 what is Q and give me work plez
ZanzabumX [31]
8.7/2=q/4
multiply both sides by 4: q=8.7/2*4
multiply both sides by 2: 2q=8.7 times 4
refine the equation: 2q=34.8
multiply both sides by 10: 20q=348
Divide both sides by 20: 20q/20=348/20
refine the equation for the final answer: q=87/5
8 0
2 years ago
Simplify twelve and one fourth
joja [24]

Answer:49/4

Step-by-step explanation:

Improper fraction

7 0
3 years ago
prove that sin theta cos theta = cot theta is not a trigonometric identity by producing a counterexample
Zolol [24]

Answer:

To prove that ( sin θ cos θ = cot θ ) is not a trigonometric identity.

Begin with the right hand side:

R.H.S = cot θ = \frac{cos \ \theta}{sin \ \theta}

L.H.S = sin θ cos θ

so, sin θ cos θ ≠ \frac{cos \ \theta}{sin \ \theta}

So, the equation is not a trigonometric identity.

=========================================================

<u>Anther solution:</u>

To prove that ( sin θ cos θ = cot θ ) is not a trigonometric identity.

Assume θ with a value and substitute with it.

Let θ = 45°

So, L.H.S = sin θ cos θ = sin 45° cos 45° = (1/√2) * (1/√2) = 1/2

R.H.S = cot θ = cot 45 = 1

So, L.H.S ≠ R.H.S

So, sin θ cos θ = cot θ is not a trigonometric identity.

5 0
3 years ago
Change the following decimal numbers to percents. .25 .278 2.9 3.0 0.67
umka2103 [35]
25=2,500, 278= 27800%, 2.9=290, 3.0=300, 0.67= 67
3 0
3 years ago
Read 2 more answers
what equation is used to represent "three minus the difference of a number and one equals one-half of the difference of three ti
sesenic [268]
(n-1)-3=1/2(3n-4)
hope it hrlps
8 0
3 years ago
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