Answer:
(a) The product of the sum of a and b and their difference.
(b) The tripled product of 6a and b².
(c) The difference of the squares of 2m and 7n.
How many 5/8s are in 3?
1 answer:
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The two problems are almost identical: you have to set up a system, and then solve it.
In the first case, let and
be, respectively, the number of girls and boys.
We know that (the number of girls in the Spanish Club is four more than twice the number of boys). Also, we know that
(there are 61 students in total).
So, we have the system
We can use the first equation to substitute in the second
And then solve for :
For the second problem, let and
be the number of pins knocked down by, respectively, Carrie and John. Just like before, we have the system
And you can solve it in the very same way we solved the previous one.