Answer:
present Age of " A " will be (x) = 45 years
present Age of " B " will be (y) = 24 years
Step-by-step explanation:
Age of " A " = x years
Age of " B " = y years
(Three years ago A's age was double of B's age.)
==> (x-3) = 2 * (y-3)
==> x - 2y = -6 + 3
==> x - 2y = -3 -------------(1)
(Seven years hence, the sum of their ages will be 83 years )
==> (x+7)+(y+7) = 83
==> x + y = 83 - 14
==> x + y = 69 ------------(2)
Subtract equ.(1) & equ(2)
==> -2y - y = -3 - 69
==> -3y = -72
==> y = -72/(-3)
==> y = 24
Keep value of y in equ(2)
==> x + 24 = 69
==> x = 69 - 24
==> x = 45
Step-by-step explanation:
By Law of Indices, a^m * a^n = a^(m+n).
Therefore 8³ * 8⁵ = 8^(3+5) = 8⁸.
Answer:
$3.62 per gallon
Step-by-step explanation:
let initial price per gallon be .
Price per gallon is raised by 8%. The new price will therefore be calculated as:
Hence the new price per gallon is $3.62
Answer:
135
Step-by-step explanation:
Greatest value: 90 degrees F
Least value: -45 degrees F
90-(-45)=135
Answer:
4.82
Step-by-step explanation:
Ok so 350 goes into 1687 4 times, leaving you with 287, drop the 0. You now have a decimal and 2870, 350 goes into 2870 8 times leaving you with 70, drop the 0. You now have 700, 350 goes into 700 2 times leaving you with zero. Therefore you have 4.82.
Hopefully this helped you