Answer:
1. rational number
2. a positive rational number
Step-by-step explanation:
A rational number is a number that can be expressed as a simple fraction. When two rational numbers are multiplied together, the only logical answer would be for the outcome/product to also be rational.
The reciprocal of a positive rational number is also a positive rational number because if the original number was negative, the reciprocal would also be negative since the signs wouldn't change (in this case, the original number is positive). Since the original number is already a rational number, just by flipping it (the reciprocal), it would not change to an irrational, but instead stay the same.
X^2+4x+4+y^2-10y+25=-13+25+4
(x+2)^2 + (y-5)^2= 16
Third option
Answer: 
Step-by-step explanation:
We are told the wind turbine makes 76 revolutions in 1 minute. This means the angular speed 
of the object in revolutions per minute (rpm) is:
(1)
However, we have to convert this to 
, since this is the unit used in the International Systme of Units for angular speed.
So, we can do this knowing that:
(2)
Where:
is the value of one revolution
is the period of rotation
With this information in mind, let's make the conversion:
(3)
(4) This is the wind turbine angular speed
Answer:
Potato
Step-by-step explanation:
1 kg = 1000 g
Assuming the potatoes have the same mass, and the pears have the same mass, then the mass of each potato is:
1000 g / 5 = 200 g
And the mass of each pear is:
1200 g / 8 = 150 g
So a potato has more mass than a pear.
Answer:
A is correct
Step-by-step explanation:
