Question 3 You write 75. 7-9 = 7-4. Keisha challenges you, "Prove it!" Show directly why your answer is
correct without referencing the laws of exponents for integers; in other words, xq .xb = xa+b for
positive numbers x and integers a and b.

its definatley   this on your answer choice?

x is greater than 5

step-by-step explanation:

2x+7 is greater than 17

    -7                           -7

2x is greater than 10

divide by 2 each side

x is greater than 5

where is the graph? need more info

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.