Answer:
thats too much and thats tuff
Step-by-step explanation:
Distribution property
a(b+c) = ab*ac
now, why does this matter
cause
-(9-10n) is equivalent to -1*(9-10n)
applying distribution property
-1*(9-10n) = -1*9 +-1-10n= -9 +10n
Factor the following:
20 b - 16
Factor 4 out of 20 b - 16:
Answer: 4(5 b - 4)
Answer:
p : 3.4
Step-by-step explanation:
2.1-2*p=-4.7
2.1+4.7=2*p
2*p=6.8
p=6.8/2= 3.4
Step-by-step explanation:
Sn= a+[n-1]d
S2= a+[2-1]d
8.5 = a+d _______Equation 1
S5 = a+[5-1]d
13=a+4d ________Equation 2
Subtract Equation 1 from Equation 2
13=a+4d
-
8.5= a+d
________
4.5= 3d
d=1.5
Substituting d=1.5 in equation 1
8.5=a+1.5
a=8.5-1.5
a=7
Sum of terms of an A.P =
Sn= n/2[2a+(n-1)d]
292= n/2[2×7+(n-1)d]
292=n/2[14+(n-1)1.5
292×2=n[14+(n-1)1.5]
584=n[14+1.5n-1.5]
584= 14n+1.5n²-1.5n
584= 1.5n²+12.5n
1.5n²+12.5n-584
1.5n²-24n+36.5n-584
1.5n(n-16)+36.5(n-16)
(1.5n+36.5)(n-16)
**n-16=0
n=16