Answer: -3/2
Step-by-step explanation:
m= y2-y2 over x2-x1
4-7 over 2-0 is m= -3/2
Hope this helps! :)
Answer:
3.1
Step-by-step explanation:
Answer:
(x+2)(x+8)=0
Step-by-step explanation:
the first term x² can only be factored by (x) times(x), and the last term 16 has factors of 16&1, 4&4 or 8&2. only 8 &2 have a sum of 10x (the middle term) so
(x+2)(x+8)=0
Answer:
some of her songs are fine, but I think her brother deserves way more credit than he gets.
Answer:
12 liters
Step-by-step explanation:
Let the solution with 30% acid solution be x litres
And the solution of with 70% alcohol to be y liters
X = Volume of 30% solution in liters
Y = Volume of 70% solution in liters
For acid solution,
30/100 × x = 0.3x
For alcohol solution,
70/100 × y = 0.7y
Since we need 54% of the combination of the 2 solutions: 54/100 = 0.54
The combination of the 2 solutions must give us 54 solutions combination and that is:
0.3x + 0.7y = 0.54(x+y)___ equation 2
X+y = 20_____ equation 1
solve the system of equations and we have:
From equation 2, x +y = 20
Therefore x = 20 -y
Replace the above in equation 2
0.3(20 - y) + 0.7y = 0.54(20)
6 - 0.3y + 0.7y = 10.8
Collect like terms
0.4y = 4.8
Y = 12 liters and that means 12 liters of 70% alcohol solution