Answer:
I think these two are right.
it is a valid sample because money is offered to participants.
it is a valid sample because the first 10 people were selected to participate.
It’s D i just took the test
El valor del número A es 692.31.
<h3>
Percentage</h3>
The percentage is the given definition for a fraction whose denominator is equal to 100. It is represented by %. See the following example:

The percentage is considered a math tool with several applications and areas, for example: medicine, engineering, investments, supermarkets, drugstores,banks etc.
The exercise asks you the value of A and it gives you the value (900) that represents 130%A. Thus, you should write an equality between the division the percentage and the variable A by 100 with the value 900.
You should follow the steps below.

You can check the result : 
Read more about the percentage here:
brainly.com/question/24304697
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The angle of a a triangle is 180 so you do
180 - 44 = 136
136 - 31 = 105
so y = 105
Answer: Solve for
x
x
by simplifying both sides of the equation, then isolating the variable.
Exact Form:
x
=
16
15
x
=
16
15
Decimal Form:
x
=
1.0
¯
6
x
=
Mixed Number Form:
x
=
1
1
15
Step-by-step explanation: