Answer:
a. {(0, 7), (-1, 6)}
Step-by-step explanation:
subtract the equations
for , substitute x = 0
for , substitute x = 0
Answer:
a + b = 16 or -16.
Step-by-step explanation:
a - b = 4
ab = 60 so a = 60/b
Substituting for a in the first equation:
60/b - b = 4
60 - b^2 = 4b
b^2 + 4b - 60 = 0
(b + 10)b - 6) = 0
b = 6, -10.
Therefore, from the first equation:
When b = -10 . a + 10 =4 giving a = -6 or
When b = 6, a - 6 = 4 giving a = 10.
So when a = -6, b = -10 and
when a = 10, b = 6.
So a + b is either 16 or -16.
Positive.
imagine it on a graph, the distance on the x axis and the speed on the y axis. so the higher the speed gets, going up the y axis, the farther distance you go on the x axis
Hope this helps!
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Answer:
the bank contains 30 nickels and 70 dimes.
Step-by-step explanation: