21 = 3(3n - 5)
21 = 3(3n) - 3(5)
21 = 9n - 15
<u>+15 +15</u>
<u>36 </u>= <u>9n</u>
9 9
4 = n
Answer:
8 in, 8 in and 20 in
Step-by-step explanation:
Let the equal sides of the isosceles triangle be x, then
The base = 2.5x
Sum the 3 sides and equate to the perimeter of 36
x + x + 2.5x = 36
4.5x = 36 ( divide both sides by 4.5 )
x = 8
Thus the 2 equal legs = 8 in
base = 2.5x = 2.5 × 8 = 20 in
Answer:
240km
Step-by-step explanation:
400km/5hrs = xkm/3hrs
cross multiply to get
1200=5x
divide both sides by 5
240=x
Answer/Step-by-step explanation:
÷ 2 ÷ 4
- -4 x -4 x -4 = -64
- -64 ÷ 2 = -32
- -32 ÷ 4 = -8
Answer:
Your account is going to be worst $405,142.92
Step-by-step explanation:
This is a compound interest problem.
The compound interest formula is given by:
Where A is the amount of money, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per unit t and t is the time the money is invested or borrowed for.
So, for this problem:
We want to find A
Your account is going to be worst $405,142.92