Answer:
97,655
Step-by-step explanation:
5(5)^(n-1) = 78,125
5^n = 78,125
n = 7
=> S7 = 5(5^7 -1) / (5-1)
= 5/4 (78, 125 -1)
= 5/4 (78 124) = 97,655
Answer:
60 mph
Step-by-step explanation:
Answer:
5
Step-by-step explanation:
Y = 5x + 3 please mark me brainliest and comment if you want an explanation.
Answer:
x = 8, y = 2
Step-by-step explanation:
2x - 7y = 2 (1)
4x + 5y = 42 (2)
2x = 2 + 7y (1)
2(2 + 7y) + 5y = 42 (2)
4 + 14y + 5y = 42
19y = 38
y = 2
2x = 2 + 7(2) = 16
x = 8