Answer:
1. True
2. False
3. True
4. False
5. True
Step-by-step explanation:
1. For a real number a, a + 0 = a.
This is true, any number plus zero is that number.
2. For a real number a, a + (-a) = 1.
This is false. Adding a negative number is the same as subtracting that number. So a + (-a) = a - a = 0
3. For a real numbers a and b la-bl = |b-al.
This is true. Absolute value represents the distance between two numbers. This number can never be negative, therefore la-bl = |b-al.
4. For real numbers a, b, and c, a +(bº c) = (a + b)(a + c).
False. a + (b * c) = a + bc.
If you foil (a + b)(a + c) you will see its equal to a²+ab+ac+bc, which is definitely different than a + (b*c)
5. For rational numbers a and b when b# o, is always a rational number.
True, a rational number is one that can be written as a fraction with two integers. The quotient of two rational numbers can always be written as a fraction with integers.
Answer:
27
Step-by-step explanation:
4 times 27 is 108
108-44=64
Answer:
Step-by-step explanation:
Area of the Pond A= 
The increase in the area of the pond as it moves outward is: 
Since the area of the circle formed increases at the rate of 100 square feet per minute.
= 100 Square feet per minute
When the radius, r = 5 feet, we want to determine the rate at which the radius is changing, 
.
The increase in altitudes of a
car after driving 4,000 feet along the road to the nearest foot is 695 feet. I
am hoping that this answer has satisfied your query and it will be able to help
you in your endeavor, and if you would like, feel free to ask another question.
Answer:
28 kilowatt hours
Step-by-step explanation:
The total distance = 2 × 42 miles = 84 miles
So the kilowatt hours of electricity would it will take = 
