Mimi has 16 more bouncy balls than leah.
2 answers:
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Answer:
6 Nickels
42 Dimes
Step-by-step explanation:
There are 48 coins in total (nickels and dimes). Let the number of nickels be "n" and the number of dimes be "d". So we can write:
n + d = 48
or
n = 48 - d
In dollars, we know nickels are worth 0.05 and dimes are worth 0.10. In total there is $4.50, so we can write:
0.05n + 0.10d = 4.50
Now replacing first equation [n = 48 - d] into 2nd, we get and equation in "d" and solve for d first:
So, there are 42 dimes.
We know from before, n = 48 - d, so
n = 48 - 42 = 6
There are 6 nickels
<h2>Given↷</h2>
A system of equations
- y= x-1
- y= -2x+5
- The solution to the system of equations
- (2,1)
y = x -1 _ _ _ _ _ _(1)
y=-2x+5_ _ _ _ _ _(2)
- subtracting equation 2 from equation 1,
we get,
x -1 = y
-(-2x +5 = y)
__________
3x -6 = 0
3x = 6
x = 6/3
x = 2
___________
- Plugging the value of x in equation 1,
y= 2-1
y= 1
- hence, the solution of this system of equation is (2,1)