Answer:
Step-by-step explanation:
To be rational means to be able to express the result as the ratio of two whole numbers.
a) 4/7 + (-1/3) = 12/21 - 7/21 = 5/21 so rational
b) √(4) • 2/5 = ±2 • 2/5 = ±4/5 so both solutions are rational
Answer: D
Step-by-step explanation:
You save the most money with option D. Not in the long run though
Answer: 
<u>Simplify both sides of the equation</u>
<u></u>
<u></u>
<u></u>
<u>Subtract 2 from both sides</u>
<u></u>
<u></u>
<u></u>
<u>Divide both sides by 2</u>
<u></u>
<u></u>
The answer is 32.72 degree.
<span />
we have

Group terms that contain the same variable, and move the constant to the opposite side of the equation

Factor the leading coefficient

Complete the square. Remember to balance the equation by adding the same constants to each side


Rewrite as perfect squares

-----> equation in vertex form
therefore
the answer is the option C
