By three times the number variable
Answer:
5 years
Step-by-step explanation:
The formula for the amount of simple interest (I) at rate r on principal P for t years is ...
I = Prt
Filling in the given numbers and solving for t, we have ...
3150 = 7000·0.09·t
3150/630 = t = 5 . . . . . divide by the coefficient of t
The loan was for 5 years.
Answer:
7.5d
Step-by-step explanation:
The n th term of an arithmetic sequence is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = d, thus
= d + 7d = 7 d = 7.5d
Answer:
7x+21 = 7x + 21
Step-by-step explanation:
7(x+3)=6-(-7x - 15)
L.H.S
=7(x+3)
=7x+21 (multiply 7 by (x+3))
R.H.S:
=6-(-7x - 15)
= 6+7x+15 (multiply the -ive sign in the bracket)
= 7x + 21 ( adding 15 and 6)
now compare the two sides
7x+21 = 7x + 21 hence we prove that L.H.S= R.H.S