1. Identify the property used below. 7+ (a + b) = (7 + a) + b
Commutative Property
Associative Property
Identity Property
Inverse Property
Property of Zero
Distributive Property
Reflexive Property
Symmetric Property
Transitive Property
Closure Property

answer: 15

step-by-step explanation:

sites:

for a it would be 24 children.

for b i don't understand the question. is it saying for each individual person they pick 5 reds to 7 greens or is it the whole group. clarify and i hope this can you.

step-by-step explanation:

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.