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vampirchik [111]
3 years ago
7

Consider the system of equations.

Mathematics
2 answers:
lidiya [134]3 years ago
5 0

Answer:

A. (4, -4)

Step-by-step explanation:

Equation form x = 4, y = −4

Yuri [45]3 years ago
5 0

Answer:

Option A

Step-by-step explanation:

5x + 2 y = 12 -----------(I)

5x - 2y = 28 ------------(II)

Add equation (I) & (II). So, y will be eliminated and we will get the value of x

(I)     5x + 2y = 12

(II)     <u>5x -2y  = 28  </u>  {Now add}

         10x      =  40

                  x = 40/10

x = 4

Plugin x = 4 in equation (I)

5*4 + 2y = 12

20 + 2y = 12

        2y = 12 - 20

        2y = -8

          y = -8/2

y = -4

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7 0
3 years ago
The temperature went from -16°F to 7°F. What was the change in temperature?
worty [1.4K]

Answer:

To find this out, we first need to see the change, is it a positive change or a negative change? Well in this case, as the temperature is increasing, we find that the change is positive. The next step we need to do, id that, how much was the change by, we can find this out by finding the absolute value of the difference of -16°F and 7°F

The absolute value means, the operations answer has to be positive, if not then it will become positive.

|-16°F -7°F|

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4 0
3 years ago
In a study of
o-na [289]
We know that:
Mean = 82 mm and SD = 10 mm ( standard deviation )
82 - 3 * SD = 82 - 3 * 10 = 82 - 30 = 52 mm
82 + 3 * SD = 82 + 3 * 10 = 82 + 30 = 112 mm
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By the 66- 95 - 99.7 % rule it is: 99.7% of the test group.
0.977 * 500 = 498.5
Answer:
99.7 % of the test group have a diastolic pressure between 52 and 112 mm, or 498 men. 
5 0
4 years ago
Someone help me pls, for real
Naily [24]

Answer:

whats the question

Step-by-step explanation:

3 0
3 years ago
Gonna need help answering this <br> Y=1/2x+7<br> Y=x-8
Nata [24]
What is the problem?
3 0
3 years ago
Read 2 more answers
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