This is an arithmetic sequence with the common difference being 1
and if u have 1 cent on day 1 and 2 cents on day 2....then on day 40, u would have 40 cents....but we need the sum of all the days..
the sum of an arithmetic sequence can be found using the formula :
sn = n(a1 + an) / 2
n = number of terms = 40
a1 = first term = 1
an = last term = 40
now we sub
s(40) = 40(1 + 40) / 2
s(40) = 40(41)/2
s(40) = 1640/2
s(40) = 820.....820 cents = $ 8.20 <== the sum
Answer:
7x -14=35 add 14 on both sides
7x= 49 then, divide 7 on the whole equation
<u>x=7</u>
Answer:
m=7
Step-by-step explanation:
12m=84
Divide each side by 12
12m/12 =84/12
m =7
Answer:
15. 122.49 16.13.17
Step-by-step explanation:
f(x) = y, when the graph touches the y-axis, x = 0.
