First step find a common multiple, e.g. 45 and subtract
9x + 5y = 28 * 5
5x + 9y = 56 * 9
45x + 25y = 140
-(45x + 81y = 504)
-56y = -364
56y = 364
y = 6.5
Substitute into any equation
9x + 5(6.5) = 28
9x + 32.5 = 28
9x = -4.5
x = -0.5
x = -0.5 , y = 6.5
Answer:
20/56 or 5/14
Step-by-step explanation:
Prob of red = 5/8
Second red prob = 4/7
multiply those = 20/56
simplify if needed = 5/14
B. There are many factors at work to control the population.
Answer:
(1,9.7) and (4,38.8)
The unit rate is 9.7 feet per second
Answer:
D. $40
Step-by-step explanation:
To find how much he saved, divide the price of the MP3 player by 3:
124/3
= 41.33
This is closest to answer choice D, $40
