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Sonja [21]
3 years ago
6

Solve x +2y = -2, 4x + 2y = -17

Mathematics
1 answer:
Alina [70]3 years ago
3 0

Answer:

x = -5

y = 3/2

Step-by-step explanation:

x+2y = -2

4x + 2y = -17

_______________

-4(x+2y = -2)

4x+ 2y = -17

_______________

-4x - 8y = 8

4x + 2y = -17

_______________

-6y = -9

y = 3/2

plug this value back into 1 of the 2 equations in the original problem to solve for x

x+2y=-2

x + 2(3/2) = -2

x + 3 = -2

x = -5

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in Mr.Kleins class, 40% of the students are boys. What decimal represent the portion of the students that are girls
Anna71 [15]

Answer:

well there is 60% girls

Step-by-step explanation:

40% are boys out of 100%

So what you have to do is find out what added by 40 is 100 which is 60 so it's

40% boys to 60% girls

4 0
3 years ago
Evaluate g(x) = 0.023x3 + 0.4x2 − 2.1x + 8.3 for x = 2 and x = 4.
vivado [14]

Plug in 2 and 4 for every instance of x in the function g(x).

g(x) = 0.023x³ + 0.4x² − 2.1x + 8.3

g(2) = 0.023(2)³ + 0.4(2)² − 2.1(2) + 8.3 = 5.884

g(4) = 0.023(4)³ + 0.4(4)² − 2.1(4) + 8.3 = 7.772

answer: 5.884 and 7.772

6 0
3 years ago
Mr.Cooper has 3pails with golf balls in them.The first pail has 87ball.The second has 105golf balls and the third has 113golf ba
qwelly [4]

The total number of golf balls that Mr.Cooper has in the 3 pails is 305

<h3><u>Solution:</u></h3>

It is given that Mr. Cooper has 3 pails with golf balls in them.

The first pail has 87 ball

The second has 105 golf balls and the third has 113 golf balls.  

We need to find the total number of golf balls that Mr. Cooper has in the 3 pails.

To find the total number of golf balls we need to add the number of balls in each pail.

<em>Total number of golf balls in 3 pails = number of balls in first pail + number of balls in second pail + number of balls in third pail</em>

Total number of golf balls = 87+105+113

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Therefore, the total number of golf balls in all 3 pails combined it 305

3 0
3 years ago
What is the name of the rat that is opposite NP?
nignag [31]
<h3>Answer: D) Ray NM</h3>

Ray NP starts at point N as the fixed endpoint and goes off forever in the direction of point P.

The opposite would be to turn 180 degrees and go the other way. So we start at N and instead go off forever toward point M. In either case, the starting point is still the same (point N).

When naming rays, the order is important. Ray NM is different from ray MN. This is because the first letter is the fixed end point (that doesn't go off forever in one direction).

6 0
3 years ago
Tricia is looking to buy speakers that cost $349 plus the sales tax rate, which is 2.7%. What is the total amount she will pay a
m_a_m_a [10]

Answer:

The total amount she will pay after taxes is $339.58

Step-by-step explanation:

The Total cost of the speaker plus tax = $349

The tax rate applied = 2.7%

Tax payable = $349 * 2.7% = $9.423

The tax amount on the speaker is Tricia = $9.423

Thus, the total amount she will pay after taxes (i.e. paying $9.423) for purchase of the Speaker will be = $349 - $9.423 = $339.58.

The original price of the speaker excluding tax is $339.58.

5 0
4 years ago
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