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Alex17521 [72]
2 years ago
9

What is the solution to the following system of equations?

Mathematics
1 answer:
Lilit [14]2 years ago
8 0
I pretty sure it’s C. if it’s not i’m sorry
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(−2)⋅(8)−(4)⋅(−3)<br> A. -17<br> B. -3<br> C. -4
Gwar [14]
The Answer To This Problem is: C.-4
8 0
3 years ago
Please help me with this question!! I also need the steps
e-lub [12.9K]

Hi there!

\large\boxed{x = \frac{\pi}{3} \text{ and } \pi}

We are given:

cos(7x)cos(4x) = -1 - sin(7x)sin(4x)

Begin by moving all terms with variables to one side:

cos(7x)cos(4x) + sin(7x)sin(4x) = -1

The corresponding trig identity is cos(A - B). Thus:

cos(7x - 4x) = cos(7x)cos(4x) + sin(7x)sin(4x) = -1

cos(3x) = -1

cos = -1 at  π, so:

3x = π

x = π/3

We can also find another solution. Let 3π = -1:

3x = 3π

x = π

Thus, solutions on [0, 2π) are π/3 and π.

8 0
3 years ago
Find the approximate difference in the area of the two circles shown below. Use 3.14 for pi.
Kobotan [32]

Answer:

b answer

Step-by-step explanation:

8 0
2 years ago
The population of medfield is 7000 Capitol City's population is 8/25 of Medfields what is capitol city's population
Dmitry_Shevchenko [17]
8/25 of medfield....." of " means multiply

8/25(7000) = 56,000/25 = 2240 <== capital city's population
5 0
3 years ago
4x + 1 = 2x - 5<br> show all steps
konstantin123 [22]

How to solve your question

Your question is

4

+

1

=

2

−

5

4x+1=2x-5

4x+1=2x−5

Solve

1

Subtract  

1

1

1

from both sides of the equation

2

Simplify

3

Subtract  

2

2x

2x

from both sides of the equation

4

Simplify

5

Divide both sides of the equation by the same term

6

Simplify

Solution

=

−

3

3 0
3 years ago
Read 2 more answers
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