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loris [4]
3 years ago
8

Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.

Mathematics
1 answer:
tangare [24]3 years ago
5 0

Answer:

-1 -3

Step-by-step explanation:

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What is the solution of 3x + y = 9 and 3x − 5y = 15?
Marianna [84]
So there are two ways.
First you could solve for y and plug it into the calculator. one equation for y1 and another for y2. Then go 2nd trace and press 5 and then press enter 3 times  to find the intersection. 
the second way is to solve by hand. I would suggest solve the first equation for y and plug the equation solved for y into the other equation. so y = -3x + 9 and 3x-5y=15. Then you could do 3x - 5(-3x+9) = 15. Finally solve for x and plug in x into both equations to see if you get the same y value. 
The answer should be (10/3, -1) 
3 0
3 years ago
Read 2 more answers
Find the MAD for this set of data.
Nostrana [21]

Answer:

Hence MAD=0.8

Step-by-step explanation:

<u>MAD-</u>

MAD is also known as Mean Absolute Deviation.

We find MAD by the following steps:

  • Firstly we find the mean of the data
  • Then we subtract each entry from the mean to obtain the deviation
  • Then find the absolute value of the deviation which is also known as absolute deviation.
  • Finally we find the mean of the absolute deviation.

Now we are given a table of the absolute deviation we just need to calculate the mean of the absolute deviation.

The absolute deviation is given as:

1    3    1    0    0    1    0    0    1    1

The mean of this is calculated as:

\dfrac{1+3+1+0+0+1+0+0+1+1}{10}=\dfrac{8}{10}=0.8

Hence, MAD=0.8




7 0
4 years ago
Read 2 more answers
What is the perimeter of this right triangle?<br>23 <br>18<br>32.5<br>30​
IceJOKER [234]

Answer: 30

Step-by-step explanation:

Just did it

5 0
3 years ago
a recipe call 2 1/2 cups of flour and 3/4 cup of sugar and two eggs . you need to double the recipe to feed your family .how man
leonid [27]

Answer:

5 cups of flour, 1 1/2 cups of sugar, 4 eggs

I'm pretty sure ab this one

Step-by-step explanation:

3 0
3 years ago
In a quadratic function, the axis of symmetry and the vertex
cricket20 [7]
Always. The axis of symmetry will always have the same x value as the vertex in a up or down opening parabola.
3 0
3 years ago
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