3-(-9)=12
answer of this question is 12
Answer:
3
Step-by-step explanation:
The answer is 3 because 3 pounds would equal $23.31.
$46.69 (what she had left) plus $23.31 (the 3 pounds she bought) = $70.
Answer:
Umm here BUT DONT JUDGE I HAD TO DO THIS ON MICROSOFT PAINT WITH A MOUSE AND IT WAS NOT FUN slope= 3/4
Step-by-step explanation:
ok if this is wrong sry :C
Answer:
81
Step-by-step explanation:
The formula for calculating the sum of geometric series varies depending on the value of its common ratio.
Given the common ratio to be 2/3 which is less than 1, the formula to be used is given as;
Sn = a(1-rⁿ)/1-r
n is the number of terms of the series
a is the first term
r is the common ratio.
Sn is the sum of the series
Given n = 3, r = 2/3 and Sn = 171,
a= ?
Substituting this values in the formula we have;
171 = a{1-(2/3)³}/1-2/3
171 = a{1-8/27}/(1/3)
171 = a(19/27)/(1/3)
171 = 19a/27 × 3/1
171 = 57a/27
57a = 171×27
57a = 4,617
a = 4,617/57
a = 81
The first term of the series is 81
