I assume you are asking to solve:
-2x^2 + 3x - 9 = 0
So first, this equation does not have real roots.
It only has 2 complex roots.
The roots are:
3/4 * (1-i√7) and 3/4 * (1+i√7)
Answer:
3. (-3,4) x=-3, y=4
Step-by-step explanation:
1. 3x-y=-13
-y=-13-3x
y=13+3x
2. 4x+2y=-4
4x+2(13+3x)=-4
4x+26+6x=-4
10x+26=-4
10x=-4-26
10x=-30
x=-30/10
x=-3
3. y=13+3x
y=13+3(-3)
y=13-9
y=4
<u>Given:</u>
Ratio of white and blue paint is 2:3
Total quantity of paint is 20 litres
<u>To find:</u>
Quantity of blue paint to be mixed so that the ratio of white paint to blue paint becomes 1:7
<u>Solution:</u>
The ratio 2:3 totals 20 that is 
So, the quantity of white paint in the mixture is 
and the quantity of blue paint in the mixture is 
Now, to get the final ratio as 1:7, Mary should have 
of blue paint. So, she need to add 
.
Therefore, Mary has to add 44 litres of blue paint to the mixture to make the ratio as 1:7.
Step-by-step explanation:
your welcome
....................
Answer:
The computer's initial price was $500.
Step-by-step explanation:
If you notice, at the top left of the graph, the y is 500 and the x is 0. The x-axis is also the timeline while the y-axis is the price line.
I hope this helped! :)
