Answer:
1. 7
2. 35
3 & 4. 7x = 70
5. 10
Step-by-step explanation:
Hello :
the sum is arithmetic secquence of common -diff is :
(-7)-(-5) =(-5)-(-3) = (-3)-(-1) =-2 = d
the first term is : a1 = -1
<span>the formula of the sum : S= (n/2)(a1 +an)
n is number of term an = a1+(n-1)d</span>
Answer:
picture ?
Step-by-step explanation:
An irrational number is a number that can't be written as a simple fraction such as pi because you can't turn pi into a fraction.