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pochemuha
3 years ago
7

Solve the system using elimination.

Mathematics
2 answers:
olya-2409 [2.1K]3 years ago
7 0

Answer:

B. (-3,-8)

Step-by-step explanation:

I have aced tests on these. You can trust this is correct - plus it's verified by a calculator.

Gelneren [198K]3 years ago
4 0

Answer:

B

Step-by-step explanation:

x - 4y = 4 → (1)

3x - 4y = - 12 → (2)

Multiplying (1) by - 1 and adding to (2) will eliminate the y- term

- x + 4y = - 4 → (3)

Add (2) and (3) term by term to eliminate y

2x + 0 = - 16

2x = - 16 ( divide both sides by 2 )

x = - 8

Substitute x = - 8 into either of the 2 equations and solve for y

Substituting into (1)

- 8 - 4y = 4 ( add 8 to both sides )

- 4y = 12 ( divide both sides by - 4 )

y = - 3

solution is (- 8, - 3 ) → B

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How much is a 6% commission on a sale of $24,000?
WINSTONCH [101]

Answer:

$1440

Step-by-step explanation:

You just find 6% of $24,000.

24000 x 0.06 = 1440

$1440

3 0
3 years ago
Read 2 more answers
Suppose medical records indicate that the length of newborn babies (in inches) is normally distributed with a mean of 20 and a s
andreyandreev [35.5K]

Step-by-step answer:

The normal probability curve is symmetrical about the mean.  

This means that for an event that is normally distributed, there is a 50% probability that it falls below the mean, and a 50% probability that it falls above.

From the given information, the mean is 20" and we need the probability that a given infant is longer than 20", namely the mean.

Therefore by the definition of the normal probability curve, there is a 50% probability that the length falls above 20".

This can be verified by referencing a normal probability table with Z=0, meaning at the mean, the probability is equal to 0.5 for Z<0, and therefore 0.5 for Z>0.

Z=(X-mean) / Standard deviation

When Z>0, X (measurement) is greater than the mean

When Z<0, X is less than the mean.

8 0
3 years ago
Can someone pls help me??? ​
Sidana [21]

a) Two angles are said to be complementary if their sum is equal to 90°

Given : 2x and 4x are complementary angles

⇒   2x + 4x = 90°

⇒   6x = 90°

⇒   x = 15°

<u>Answer</u>: The two angles are : 30° and 60°

b) Two angles are said to be supplementary if their sum is equal to 180°

Given : x and 5x are supplementary angles

⇒   x + 5x = 180°

⇒   6x = 180°

⇒   x = 30°

<u>Answer: </u>The two angles are : 30° and 150°

c) Two angles are said to be complementary if their sum is equal to 90°

Given : x and x + 50° are complementary angles

⇒   x + x + 50° = 90°

⇒   2x = 40°

⇒   x = 20°

<u>Answer:</u> The two angles are : 20° and 70°

d) If two angles form a linear pair, then the sum of the angles should be equal to 180°

Given : 2x + 10° and 3x + 10° form a linear pair

⇒   2x + 10° + 3x + 10° = 180°

⇒   5x = 160°

⇒   x = 32°

⇒  2x + 10° = 2(32) + 10° = 74°

⇒  3x + 10° = 3(32) + 10° = 106°

<u>Answer:</u> The two angles are 74° and 106°

7 0
3 years ago
Round 846 to the nearest hundred___________ and 3756 to the nearest thousand ________
zaharov [31]
846 rounds to 800, and 3756 rounds to 4000.
8 0
3 years ago
ANSWERRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR PLEASEEEEEEEEEEEEEEEEE
Alexeev081 [22]

<u><em>Its 41....VERY EASY</em></u>



Let me show you:

4*4= 16 because of the exponent (2)

4 times 4 =16

Then add by 25..

Which gives u 41..


Hope this helps....


5 0
3 years ago
Read 2 more answers
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