Even numbers end with 0,2,4,6,8
7 in hundreds place
odd in thousands place, odd numbers are 1,3,5,7,9
multiplue of 10 end with 0
so therfor the number has 7 in hundreds place and ends with 0 with odd in thousands and undefined hundreds place
50 options
some examples are
1730
9790
any number, x7y0 such that x is odd and y can be any number
It is called an equation.
64 dollars is the tax, the total cost would be $864.
Use this for percentages.
https://percentagecalculator.net/
C. The first is a solution, but the second is not.
5x - y/3 = 13 ; (2,-9)
substitute the letters:
5(2) - (-9/3) = 13
10 - (-3) = 13 : note that deducting a number with a negative sign turns both sign as positive.
10 + 3 = 13 ;
13 = 13
5x - y/3 = 13 ; (3,-6)
5(3) - (-6/3) = 13
15 - (-2) = 13
15 + 2 = 13
17 = 13 not equal. not a solution
hope i could help
