Answer:
z = 42
Step-by-step explanation:
z - 12 = 30
Add 12 to each side
z - 12+12 = 30+12
z = 42
Check
42 - 12 = 30
30 = 30
Answer:5/15 equals 1/3
Step-by-step explanation: i just simplified
Use the substitution method
-x+4x when x=-2
-(-2)+4(-2) Positive number * ( multiplying)Negative number=Negative number
2-8
=-6
Answer is -6
Answer:
150x + 280y = 1310
Step-by-step explanation:
S = √2+√8+√18+√32+……………… n terms.
or, S = √2 + 2√2 +3√2 +4√2.+………………….+ n terms.
This is an A.P. in which a = √2. , d = √2.
Sn = n/2.[2.a +(n-1).d].
or, Sn = n/2.[ 2√2 +(n-1).√2].
or, Sn = (n/2).√2.[ 2 +n-1].
or, Sn = n.(n+1)/√2. Answer.