If n = 7, then 5n + 4 = 5 x 7 + 4 = 39.
5n + 2 = 5 x n + 2 So, when n = 6, that is 5 x 6 + 2 = 30 + 2 = 32.
5n + 7 = -41 5n = -48 n = -48/5 n = -9.6
5n+15 = 25 5n = 25-15 5n = 10 n = 2
Firstly to get 5n you times by 5!Next n3 (n cubed) is n x n x nTherefore you are timesing n by 5 and then by n and nSo 5n3 = times n by 5 x n x n or simplifyed n x 5n2
5n if n = 7 is 5 x 7, or 35.
If n = 7, then 5n + 4 = 5 x 7 + 4 = 39.
5n + 2 = 5 x n + 2 So, when n = 6, that is 5 x 6 + 2 = 30 + 2 = 32.
Can be written as 5 x N or 5N
5n-25 = 10 5n = 10+25 5n = 35 n = 7
5n + 7 = -41 5n = -48 n = -48/5 n = -9.6
If 5n + 8 = 43, then n = 7
5n+15 = 25 5n = 25-15 5n = 10 n = 2
Could be anything! We'd have to know the final sum to figure out what "N" would be, like 5N +N = 24.
The GCF is n.
D + N = 15, so D = 15 - N; 10D + 5N = 135. Substitute: 10(15 - N) + 5N = 135 ie 150 - 10N + 5N = 135 ie 5N = 15 So she has 3 nickels and 12 dimes (3 x 5) + (12 x 10) = 15 + 120 = 135 QED
30