Answer: y1 is y coordinate
m is the slope
x1 is the x coordinate
A. y = 3x -5
B. y = 7x + 2
Step-by-step explanation:
This is a mixture problem.
mass1 * karat1 + mass2*karat = total mass * total carat
Total mass = 200g.
Total karat = 14.
Let the 9 karat gold to be mixed be x. The 18 karat would weight (200 - x). Since the total = 200g.
9*x + 18*(200 -x) = 14*200
9x + 18*200 - 18*x = 14*200
18*200 + 9x - 18x = 14*200
3600 - 9x = 2800
3600 - 2800 = 9x
800 = 9x
9x = 800
x = 800/9
x ≈ 88.89
Therefore 88.89 grams of 9 karat gold must be mixed.
Answer:
B 24
Step-by-step explanation:
+=
7^2+b^2=25^2
49+b^2=625
b^2=576
=
b=24
The answer to this question is 20/3