5) A (1,2) B (2,4)
slope. (1-2)=2-4
slope. -1= -2
slope = 2
6) D (-5,1) E ( -2,0)
slope. (-5-(-2))=1-0
slope. (-5+2)=1
slope. -3=1
slope = -1/3
7) C (-3,4) E (-2,0)
slope. (-3-(-2))=4-0
slope. (-3+2)=4
slope. -1=4
slope = -4
8) D (-5,1) B (2,4)
slope. (-5-2)=1-4
slope. (-7)= -3
slope = 3/7
Answer:
A - (2a+0)/2 ; (2b+0)/2 = ( a , b )
B - (-2a+0)/2 ; (2b+0)/2 = ( - a, b )
C - (-2a+0)/2 ; ( -2b+0)/2 = ( - a, - b )
D - (2 a+0)/2 ; (-2b+0)/2 = ( a , - b )
Step-by-step explanation:
10/16 because you multiply 8x2 to get sixteen, the denominator you need. So whatever you do to the denominator, you do to the numerator. So 5x2 is 10. 10/16
Answer:
Step-by-step explanation:
Hope this helped, please give brainliest
Thank you!
Answer:
7.5 L of 10% solution and 22.5 L of 30% solution
Step-by-step explanation:
Volume of 10% solution plus volume of 30% solution = total volume of 25% volume.
x + y = 30
Acid in 10% solution plus acid in 30% solution = total acid in 25% solution.
0.10 x + 0.30 y = 30 × 0.25
0.10 x + 0.30 y = 7.5
Solve the system of equations, using either substitution or elimination. I'll use substitution:
x = 30 − y
0.10 (30 − y) + 0.30 y = 7.5
3 − 0.10 y + 0.30 y = 7.5
0.20 y = 4.5
y = 22.5
x = 30 − y
x = 7.5
Sarah needs 7.5 L of 10% solution and 22.5 L of 30% solution.
