I’m guessing that this is for systems of equations?
n - nickels
d - dimes
These are the equations you start off with.
n = 5d-2
0.95 = 0.10d+0.05n
Substitute the top equation for n into the variable n in the bottom equation.
0.95 = 0.10d+0.05(5d-2)
Solve for d.
0.95 = 0.10d+0.25d-0.10
1.05 = 0.35d
3 = d
Substitute d into the top equation and solve for n.
n = 5(3)-2
n = 15-3
n = 12
There are 3 dimes and 12 nickels in the coin purse! Hope this helped <3
First for 7 we need to find out how many ninths are in a third and there are 3/9 in a third so now we multiply 3/9 by 2 which is 6/9 now we subtract 7/9-6/9 which is 1/9 so 1/9 is left. (Iff I'm wrong sorry I did this is like a minute.)
(2x + 6) ÷ 2 - 3
= 2(x+3) ÷ 2 - 3
= x + 3 - 3
= x
Answer:6/5+6x
Step-by-step explanation:multiply 3 by 2/5 and 15x by 2/5
Answer:
1716 m^3
Step-by-step explanation:
We can find the volume of a triangular prism by thinking about it like this - it's half of a rectangular prism. It's just be cut diagonally. So we can imagine that the measurements of the potential rectangular prism are 6m x 26 m x 22m.
Volume of rectangular prism:
6*26*22 = 3432
Volume of triangular prism:
1/2 of rectangular prism - 3432/2 = 1216
