We can use the general term of the arithmetic series. Look:
Where:
: first term, 15.
: last term, 87.
n: number of terms (what we looking for);
r: reason, which is equal to the difference between two terms, that is, 3.
Let's go to the calculations.
There are 25 terms.
Answer:
s =2
Step-by-step explanation:
you need to multiply to find the answer
6 x 2=12
Then you need to replace the s with 2 and see if it fits correctly in this case it does
6x2 -4 =8
12-4=8
Answer: 257/16
Step-by-step explanation:
You are given the algebraic expression: m^4+ 1/m^4
if m− 1/m = 3
Solve for m by cross multiplying
m - 1 = 3m
Collect the likes terms
3m - m = -1
2m = -1
m = -1/2
Substitutes m into the algebraic expression above.
(- 1/2)^4 + 1/(- 1/2)^4
Open the bracket
1/16 + 1/(1/16)
1/6 + 16
16(1/16) or 257/16
The answer is 112892.0654
Answer:
10 potatoes.
Step-by-step explanation:
Let x be the number of potatoes.
Then by proportion:
30/12 = x/4
12x = 4*30 = 120
x = 10.
