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ehidna [41]
3 years ago
11

WILL GIVE BRAINLIEST!!!! 50 POINTS!!!

Mathematics
2 answers:
m_a_m_a [10]3 years ago
5 0

Answer:

The answer is C.



Norma-Jean [14]3 years ago
5 0

Hello,

What is the value of the x variable in the solution to the following system of equations?

3x + 2y = 8

2x + 3y = 2


Lets use 4:

3(4) + 2y = 8

12 + 2y = 8

12 + 2(-2) = 8

12 + -4 = 8

--------------------

2x + 3y = 2

2(4) + 3y = 2

8 + 3y = 2

8 + 3(-2) = 2

8 + (-6) = 2

So option A is true! (But remember that there can be more than one solution.)


Lets use -2:

3x + 2y = 8

3(-2) + 2y = 8

-6 + 2y = 8

-6 + 2(7) = 8

-6 + 14 = 8

-------------------

2x + 3y = 2

2(-2) + 3y = 2

-4 + 3y = 2

-4 + 3(2) = 2

-4 + 6 = 2

So option B is also true! (But again there can be more than one solution)


Answer:

So we have proved that there can be more than 1 solution for these set of equations. So the best answer is C: x can be any number as there are infinitely many solutions to this system.

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A gear with a diameter of 12.0 inches makes 35 revolutions every three minutes. Find the linear and angular velocities of a poin
alina1380 [7]

Answer:

Angular velocity: \omega = \frac{7\pi}{18} \,\frac{rad}{s} (1.222\,\frac{rad}{s})

Linear velocity: v = \frac{14\pi}{3}\,\frac{m}{s} (14.661\,\frac{m}{s})

Step-by-step explanation:

The gear experiments a pure rotation with axis passing through its center, the angular (\omega), in radians per second, and linear velocities (v), in inches per second, of a point on the outer edge of the element are, respectively:

\omega = \frac{2\pi}{60}\cdot \dot n (1)

v = R\cdot \omega (2)

Where:

\dot n - Rotation rate, in revolutions per minute.

R - Radius of the gear, in inches.

If we know that \dot n = \frac{35}{3}\,\frac{rev}{min} and R = 12\,in, then the linear and angular velocities of the gear are, respectively:

\omega = \frac{2\pi}{60}\cdot \dot n

\omega = \frac{7\pi}{18} \,\frac{rad}{s} (1.222\,\frac{rad}{s})

v = R\cdot \omega

v = \frac{14\pi}{3}\,\frac{m}{s} (14.661\,\frac{m}{s})

7 0
2 years ago
Find the opposite of each number 3.78
koban [17]
-3.78 the opposite of a positive number will always be the negative version of that same number.
7 0
3 years ago
Levi has a job offer in which he will receive $800 per month plus a commission of 2% of the total price of the cars that he sell
Veseljchak [2.6K]

Answer:

Levi must sell more than 80000 cars per month for the new job to be better than the current job.

Step-by-step explanation:

New Job;

He receives $800 per month plus a commission of 2% or 0.02 of the total price of the cars.

Now, let the total amount he receives in a month be "y" and let the amount of cars sold be x.

Thus;

y = 800 + 0.02x - - - -(eq1)

Current Job:

He receives $1200 per month plus a commission of 1.5% or 0.015 of his total sales.

Thus;

y = 1200 + 0.015x - - - (eq2)

Substituting 800 + 0.02x for y into eq(2) gives;

800 + 0.02x = 1200 + 0.015x

0.02x - 0.015x = 1200 - 800

0.005x = 400

x = 400/0.005

x = 80000

This means Levi must sell more than 80000 cars per month for the new job to be better than the current job.

6 0
3 years ago
Simplify.<br><br> 7−−√50−6−−√24
Pie

7 +  \sqrt{50}  - 6 +  \sqrt{24}  \\ 7 + 5 \sqrt{2}  - 6 + 2 \sqrt{6}  \\ 1 + 5 \sqrt{2}  + 2 \sqrt{6}
7 0
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The temperature on degrees F for the first 2 weeks of June was as follows: 76 F, 74 F, 82 F, 72 F, 89 F, 75 F What is the mean o
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The answer is 175 because I showed my work
5 0
3 years ago
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