Answer:
The sum of the first 20 terms is 2450
Step-by-step explanation:
Sum of nth terms of an arithmetic sequence is
Sn = n/2 [2a+ (n -1)d]
Therefore, the sum of the first 20 terms
where first term = a = 18 and common difference = d = 11 is
S_20 = 20/2 [2(18) + (20 -1)11]
S_20 = 10 [36 + (19)11]
S_20 = 10 [36 + 209]
S_20 = 10 [245]
S_20 = 2450
Answer:
There should be 40 stones in the bucket
Step-by-step explanation:
4:3 = x:30
3*10 = 30
4*10 = 40
x = 40
Hopefully that helped.
<span>Equality in line segment means that the two (or more) segments being compared are exactly the same length. Congruence means that the two line segments are exactly the same. Two segments do not have to be congruent because they are equal; one could be vertical and the other could be diagonal.</span>
Answer: 11 pounds
Step-by-step explanation:
x : # of pounds an electronic is
9.98 + 0.75x : total cost of shipping an electronic that is "x" pounds
9.98 + 0.75x = 18.23
0.75x = 8.25
x = 11 pounds