find the sum of the first 30 multiples of 7

Answer:the sum of the first 30 multiples of 7 is 3255.Step-by-step explanation:We can use the formula for the sum of an arithmetic series to find the sum of the first 30 multiples of 7:Sn = n/2 * (2a + (n-1)d)where: * Sn is the sum of the first n terms * n is the number of terms * a is the first term * d is the common differenceIn this case, we have: * n = 30 * a = 7 (the first multiple of 7) * d = 7 (the common difference between multiples of 7)Substituting these values into the formula, we get:Sn = 30/2 * (2*7 + (30-1)*7)Sn = 15 * (14 + 29*7)Sn = 15 * (14 + 203)Sn = 15 * 217Sn = 3255Therefore, the sum of the first 30 multiples of 7 is 3255.

Answered by garciakyle6789 | 2024-09-08